karo-tx-linux.git
2 years agoLinux 4.12 v4.12
Linus Torvalds [Sun, 2 Jul 2017 23:07:02 +0000 (16:07 -0700)]
Linux 4.12

2 years agomoduleparam: fix doc: hwparam_irq configures an IRQ
Sylvain 'ythier' Hitier [Sun, 2 Jul 2017 13:21:56 +0000 (15:21 +0200)]
moduleparam: fix doc: hwparam_irq configures an IRQ

Signed-off-by: Sylvain 'ythier' Hitier <sylvain.hitier@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Linus Torvalds [Sun, 2 Jul 2017 18:53:44 +0000 (11:53 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull MIPS fixes from Ralf Baechle:
 "Here's a final round of fixes for 4.12:

   - Fix misordered instructions in assembly code making kenel startup
     via UHB unreliable.

   - Fix special case of MADDF and MADDF emulation.

   - Fix alignment issue in address calculation in pm-cps on 64 bit.

   - Fix IRQ tracing & lockdep when rescheduling

   - Systems with MAARs require post-DMA cache flushes.

  The reordering fix and the MADDF/MSUBF fix have sat in linux-next for
  a number of days. The others haven't propagated from my pull tree to
  linux-next yet but all have survived manual testing and Imagination's
  automated test system and there are no pending bug reports"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Avoid accidental raw backtrace
  MIPS: Perform post-DMA cache flushes on systems with MAARs
  MIPS: Fix IRQ tracing & lockdep when rescheduling
  MIPS: pm-cps: Drop manual cache-line alignment of ready_count
  MIPS: math-emu: Handle zero accumulator case in MADDF and MSUBF separately
  MIPS: head: Reorder instructions missing a delay slot

2 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 2 Jul 2017 17:09:40 +0000 (10:09 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fix from Russell King:
 "One final fix for 4.12 - Doug found a boot failure case triggered by
  requesting a non-even MB vmalloc size"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8685/1: ensure memblock-limit is pmd-aligned

2 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 1 Jul 2017 16:10:17 +0000 (09:10 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Thomas Gleixner:
 "Fixlets for x86:

   - Prevent kexec crash when KASLR is enabled, which was caused by an
     address calculation bug

   - Restore the freeing of PUDs on memory hot remove

   - Correct a negated pointer check in the intel uncore performance
     monitoring driver

   - Plug a memory leak in an error exit path in the RDT code"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/intel_rdt: Fix memory leak on mount failure
  x86/boot/KASLR: Fix kexec crash due to 'virt_addr' calculation bug
  x86/boot/KASLR: Add checking for the offset of kernel virtual address randomization
  perf/x86/intel/uncore: Fix wrong box pointer check
  x86/mm/hotplug: Fix BUG_ON() after hot-remove by not freeing PUD

2 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 1 Jul 2017 15:46:52 +0000 (08:46 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fix from Thomas Gleixner:
 "The last fix for perf for this cycles:

   - Prevent a segfault when kernel.kptr_restrict=2 is set by avoiding a
     null pointer dereference"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf machine: Fix segfault for kernel.kptr_restrict=2

2 years agoMerge tag 'pinctrl-v4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Sat, 1 Jul 2017 15:39:13 +0000 (08:39 -0700)]
Merge tag 'pinctrl-v4.12-4' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pinctrl fix from Linus Walleij:
 "Brian noticed that this regression has not got a proper fix for the
  entire merge window and consequently we need to revert the offending
  commit.

  It's part of the RT-mainstream work, the dance goes like this, two
  steps forward, one step back.

  Summary:

   - A last fix for v4.12, an IRQ problem reported early in the merge
     window appears not to have been properly fixed, so the offending
     commit will be reverted and we will find the proper fix for v4.13.
     Hopefully"

* tag 'pinctrl-v4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  Revert "pinctrl: rockchip: avoid hardirq-unsafe functions in irq_chip"

2 years agoMerge tag 'gpio-v4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Sat, 1 Jul 2017 15:24:54 +0000 (08:24 -0700)]
Merge tag 'gpio-v4.12-4' of git://git./linux/kernel/git/linusw/linux-gpio

Pull last minute fixes for GPIO from Linus Walleij:

 - Fix another ACPI problem with broken BIOSes.

 - Filter out the right GPIO events, making a very user-visible bug go
   away.

* tag 'gpio-v4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: acpi: Skip _AEI entries without a handler rather then aborting the scan
  gpiolib: fix filtering out unwanted events

2 years agoMerge tag 'trace-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Sat, 1 Jul 2017 00:18:57 +0000 (17:18 -0700)]
Merge tag 'trace-v4.12-rc5' of git://git./linux/kernel/git/rostedt/linux-trace

Pull last-minute tracing fixes from Steven Rostedt:
 "Two fixes:

  One is for a crash when using the :mod: trace probe command into
  stack_trace_filter. This bug was introduced during the last merge
  window.

  The other was there forever. It's a small bug that makes it impossible
  to name a module function for kprobes when the module starts with a
  digit"

* tag 'trace-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/kprobes: Allow to create probe with a module name starting with a digit
  ftrace: Fix regression with module command in stack_trace_filter

2 years agouapi/linux/a.out.h: don't use deprecated system-specific predefines.
Zack Weinberg [Wed, 14 Jun 2017 15:14:28 +0000 (08:14 -0700)]
uapi/linux/a.out.h: don't use deprecated system-specific predefines.

uapi/linux/a.out.h uses a number of predefined macros that are
deprecated because they're in the application namespace
(e.g. '#ifdef linux' instead of '#ifdef __linux__').
This patch either corrects or just removes them if they are not
applicable to Linux.

The primary reason this is worth bothering to fix, considering how
obsolete a.out binary support is, is that the GCC build process
considers this such a severe error that it will copy the header into a
private directory and change the macro names, which causes future
updates to the header to be masked.  This header probably doesn't get
updated very often anymore, but it is the _only_ uapi header that gets
this treatment, so IMHO it is worth patching just to drive that number
all the way to zero.

Signed-off-by: Zack Weinberg <zackw@panix.com>
[hch: removed dead conditionals]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agohashtable: remove repeated phrase from a comment
Jakub Kicinski [Thu, 29 Jun 2017 04:25:48 +0000 (21:25 -0700)]
hashtable: remove repeated phrase from a comment

"in a rcu enabled hashtable" is repeated twice in a comment.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agox86/intel_rdt: Fix memory leak on mount failure
Vikas Shivappa [Mon, 26 Jun 2017 18:55:49 +0000 (11:55 -0700)]
x86/intel_rdt: Fix memory leak on mount failure

If mount fails, the kn_info directory is not freed causing memory leak.

Add the missing error handling path.

Fixes: 4e978d06dedb ("x86/intel_rdt: Add "info" files to resctrl file system")
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ravi.v.shankar@intel.com
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
Cc: peterz@infradead.org
Cc: vikas.shivappa@intel.com
Cc: andi.kleen@intel.com
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1498503368-20173-3-git-send-email-vikas.shivappa@linux.intel.com
2 years agoMerge tag 'powerpc-4.12-8' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 30 Jun 2017 17:55:34 +0000 (10:55 -0700)]
Merge tag 'powerpc-4.12-8' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Hopefully the last two powerpc fixes for 4.12.

  The CXL one is larger than I'd usually send at rc7, but it fixes new
  code this cycle, so better to have it working for the release. It was
  actually sent a few weeks back but got blocked in testing behind
  another fix that was causing issues.

  We are still tracking one crash in v4.12-rc7, but only one person has
  reproduced it and the commit identified by bisect doesn't touch any of
  the relevant code, so I think it's 50/50 whether that commit is
  actually the problem or it's some code layout / toolchain issue.

  Two fixes for code we merged this cycle:

   - cxl: Fixes for Coherent Accelerator Interface Architecture 2.0

   - Avoid miscompilation w/GCC 4.6.3 on 32-bit - don't inline
     copy_to/from_user()

  Thanks to Al Viro, Larry Finger, Christophe Lombard"

* tag 'powerpc-4.12-8' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/32: Avoid miscompilation w/GCC 4.6.3 - don't inline copy_to/from_user()
  cxl: Fixes for Coherent Accelerator Interface Architecture 2.0

2 years agoMerge tag 'iommu-fixes-v4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 30 Jun 2017 17:37:48 +0000 (10:37 -0700)]
Merge tag 'iommu-fixes-v4.12-rc7' of git://git./linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:
 "Two fixes:

   - A fix for AMD IOMMU interrupt remapping code when IRQs are
     forwarded directly to KVM guests

   - Fixed check in the recently merged code to allow tboot with
     Intel VT-d disabled"

* tag 'iommu-fixes-v4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix interrupt remapping when disable guest_mode
  iommu/vt-d: Correctly disable Intel IOMMU force on

2 years agoMerge tag 'sound-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Fri, 30 Jun 2017 17:30:26 +0000 (10:30 -0700)]
Merge tag 'sound-4.12' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Two last-minute HD-audio fixes"

* tag 'sound-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Fix endless loop of codec configure
  ALSA: hda - set input_path bitmap to zero after moving it to new place

2 years agoMerge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...
Linus Torvalds [Fri, 30 Jun 2017 17:22:59 +0000 (10:22 -0700)]
Merge branch 'overlayfs-linus' of git://git./linux/kernel/git/mszeredi/vfs

Pull overlayfs fixes from Miklos Szeredi:
 "Fix two bugs in copy-up code. One introduced in 4.11 and one in
  4.12-rc"

* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: don't set origin on broken lower hardlink
  ovl: copy-up: don't unlock between lookup and link

2 years agox86/boot/KASLR: Fix kexec crash due to 'virt_addr' calculation bug
Baoquan He [Tue, 27 Jun 2017 12:39:06 +0000 (20:39 +0800)]
x86/boot/KASLR: Fix kexec crash due to 'virt_addr' calculation bug

Kernel text KASLR is separated into physical address and virtual
address randomization. And for virtual address randomization, we
only randomiza to get an offset between 16M and KERNEL_IMAGE_SIZE.
So the initial value of 'virt_addr' should be LOAD_PHYSICAL_ADDR,
but not the original kernel loading address 'output'.

The bug will cause kernel boot failure if kernel is loaded at a different
position than the address, 16M, which is decided at compiled time.
Kexec/kdump is such practical case.

To fix it, just assign LOAD_PHYSICAL_ADDR to virt_addr as initial
value.

Tested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 8391c73 ("x86/KASLR: Randomize virtual address separately")
Link: http://lkml.kernel.org/r/1498567146-11990-3-git-send-email-bhe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agox86/boot/KASLR: Add checking for the offset of kernel virtual address randomization
Baoquan He [Tue, 27 Jun 2017 12:39:05 +0000 (20:39 +0800)]
x86/boot/KASLR: Add checking for the offset of kernel virtual address randomization

For kernel text KASLR, the virtual address is confined to area of 1G,
[0xffffffff80000000, 0xffffffffc0000000). For the implemenataion of
virtual address randomization, we only randomize to get an offset
between 16M and 1G, then add this offset to the starting address,
0xffffffff80000000. Here 16M is the offset which is decided at linking
stage. So the amount of the local variable 'virt_addr' which respresents
the offset plus the kernel output size can not exceed KERNEL_IMAGE_SIZE.

Add a debug check for the offset. If out of bounds, print error
message and hang there.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1498567146-11990-2-git-send-email-bhe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agotracing/kprobes: Allow to create probe with a module name starting with a digit
Sabrina Dubroca [Thu, 22 Jun 2017 09:24:42 +0000 (11:24 +0200)]
tracing/kprobes: Allow to create probe with a module name starting with a digit

Always try to parse an address, since kstrtoul() will safely fail when
given a symbol as input. If that fails (which will be the case for a
symbol), try to parse a symbol instead.

This allows creating a probe such as:

    p:probe/vlan_gro_receive 8021q:vlan_gro_receive+0

Which is necessary for this command to work:

    perf probe -m 8021q -a vlan_gro_receive

Link: http://lkml.kernel.org/r/fd72d666f45b114e2c5b9cf7e27b91de1ec966f1.1498122881.git.sd@queasysnail.net
Cc: stable@vger.kernel.org
Fixes: 413d37d1e ("tracing: Add kprobe-based event tracer")
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2 years agoMIPS: Avoid accidental raw backtrace
James Hogan [Thu, 29 Jun 2017 14:05:04 +0000 (15:05 +0100)]
MIPS: Avoid accidental raw backtrace

Since commit 81a76d7119f6 ("MIPS: Avoid using unwind_stack() with
usermode") show_backtrace() invokes the raw backtracer when
cp0_status & ST0_KSU indicates user mode to fix issues on EVA kernels
where user and kernel address spaces overlap.

However this is used by show_stack() which creates its own pt_regs on
the stack and leaves cp0_status uninitialised in most of the code paths.
This results in the non deterministic use of the raw back tracer
depending on the previous stack content.

show_stack() deals exclusively with kernel mode stacks anyway, so
explicitly initialise regs.cp0_status to KSU_KERNEL (i.e. 0) to ensure
we get a useful backtrace.

Fixes: 81a76d7119f6 ("MIPS: Avoid using unwind_stack() with usermode")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.15+
Patchwork: https://patchwork.linux-mips.org/patch/16656/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2 years agoMIPS: Perform post-DMA cache flushes on systems with MAARs
Paul Burton [Tue, 13 Jun 2017 17:01:08 +0000 (10:01 -0700)]
MIPS: Perform post-DMA cache flushes on systems with MAARs

Recent CPUs from Imagination Technologies such as the I6400 or P6600 are
able to speculatively fetch data from memory into caches. This means
that if used in a system with non-coherent DMA they require that caches
be invalidated after a device performs DMA, and before the CPU reads the
DMA'd data, in order to ensure that stale values weren't speculatively
prefetched.

Such CPUs also introduced Memory Accessibility Attribute Registers
(MAARs) in order to control the regions in which they are allowed to
speculate. Thus we can use the presence of MAARs as a good indication
that the CPU requires the above cache maintenance. Use the presence of
MAARs to determine the result of cpu_needs_post_dma_flush() in the
default case, in order to handle these recent CPUs correctly.

Note that the return type of cpu_needs_post_dma_flush() is changed to
bool, such that it's clearer what's happening when cpu_has_maar is cast
to bool for the return value. If this patch were backported to a
pre-v4.7 kernel then MIPS_CPU_MAAR was 1ull<<34, so when cast to an int
we would incorrectly return 0. It so happens that MIPS_CPU_MAAR is
currently 1ull<<30, so when truncated to an int gives a non-zero value
anyway, but even so the implicit conversion from long long int to bool
makes it clearer to understand what will happen than the implicit
conversion from long long int to int would. The bool return type also
fits this usage better semantically, so seems like an all-round win.

Thanks to Ed for spotting the issue for pre-v4.7 kernels & suggesting
the return type change.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Tested-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Cc: Ed Blake <ed.blake@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16363/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2 years agoMIPS: Fix IRQ tracing & lockdep when rescheduling
Paul Burton [Fri, 3 Mar 2017 23:26:05 +0000 (15:26 -0800)]
MIPS: Fix IRQ tracing & lockdep when rescheduling

When the scheduler sets TIF_NEED_RESCHED & we call into the scheduler
from arch/mips/kernel/entry.S we disable interrupts. This is true
regardless of whether we reach work_resched from syscall_exit_work,
resume_userspace or by looping after calling schedule(). Although we
disable interrupts in these paths we don't call trace_hardirqs_off()
before calling into C code which may acquire locks, and we therefore
leave lockdep with an inconsistent view of whether interrupts are
disabled or not when CONFIG_PROVE_LOCKING & CONFIG_DEBUG_LOCKDEP are
both enabled.

Without tracing this interrupt state lockdep will print warnings such
as the following once a task returns from a syscall via
syscall_exit_partial with TIF_NEED_RESCHED set:

[   49.927678] ------------[ cut here ]------------
[   49.934445] WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3687 check_flags.part.41+0x1dc/0x1e8
[   49.946031] DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
[   49.946355] CPU: 0 PID: 1 Comm: init Not tainted 4.10.0-00439-gc9fd5d362289-dirty #197
[   49.963505] Stack : 0000000000000000 ffffffff81bb5d6a 0000000000000006 ffffffff801ce9c4
[   49.974431]         0000000000000000 0000000000000000 0000000000000000 000000000000004a
[   49.985300]         ffffffff80b7e487 ffffffff80a24498 a8000000ff160000 ffffffff80ede8b8
[   49.996194]         0000000000000001 0000000000000000 0000000000000000 0000000077c8030c
[   50.007063]         000000007fd8a510 ffffffff801cd45c 0000000000000000 a8000000ff127c88
[   50.017945]         0000000000000000 ffffffff801cf928 0000000000000001 ffffffff80a24498
[   50.028827]         0000000000000000 0000000000000001 0000000000000000 0000000000000000
[   50.039688]         0000000000000000 a8000000ff127bd0 0000000000000000 ffffffff805509bc
[   50.050575]         00000000140084e0 0000000000000000 0000000000000000 0000000000040a00
[   50.061448]         0000000000000000 ffffffff8010e1b0 0000000000000000 ffffffff805509bc
[   50.072327]         ...
[   50.076087] Call Trace:
[   50.079869] [<ffffffff8010e1b0>] show_stack+0x80/0xa8
[   50.086577] [<ffffffff805509bc>] dump_stack+0x10c/0x190
[   50.093498] [<ffffffff8015dde0>] __warn+0xf0/0x108
[   50.099889] [<ffffffff8015de34>] warn_slowpath_fmt+0x3c/0x48
[   50.107241] [<ffffffff801c15b4>] check_flags.part.41+0x1dc/0x1e8
[   50.114961] [<ffffffff801c239c>] lock_is_held_type+0x8c/0xb0
[   50.122291] [<ffffffff809461b8>] __schedule+0x8c0/0x10f8
[   50.129221] [<ffffffff80946a60>] schedule+0x30/0x98
[   50.135659] [<ffffffff80106278>] work_resched+0x8/0x34
[   50.142397] ---[ end trace 0cb4f6ef5b99fe21 ]---
[   50.148405] possible reason: unannotated irqs-off.
[   50.154600] irq event stamp: 400463
[   50.159566] hardirqs last  enabled at (400463): [<ffffffff8094edc8>] _raw_spin_unlock_irqrestore+0x40/0xa8
[   50.171981] hardirqs last disabled at (400462): [<ffffffff8094eb98>] _raw_spin_lock_irqsave+0x30/0xb0
[   50.183897] softirqs last  enabled at (400450): [<ffffffff8016580c>] __do_softirq+0x4ac/0x6a8
[   50.195015] softirqs last disabled at (400425): [<ffffffff80165e78>] irq_exit+0x110/0x128

Fix this by using the TRACE_IRQS_OFF macro to call trace_hardirqs_off()
when CONFIG_TRACE_IRQFLAGS is enabled. This is done before invoking
schedule() following the work_resched label because:

 1) Interrupts are disabled regardless of the path we take to reach
    work_resched() & schedule().

 2) Performing the tracing here avoids the need to do it in paths which
    disable interrupts but don't call out to C code before hitting a
    path which uses the RESTORE_SOME macro that will call
    trace_hardirqs_on() or trace_hardirqs_off() as appropriate.

We call trace_hardirqs_on() using the TRACE_IRQS_ON macro before calling
syscall_trace_leave() for similar reasons, ensuring that lockdep has a
consistent view of state after we re-enable interrupts.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: linux-mips@linux-mips.org
Cc: stable <stable@vger.kernel.org>
Patchwork: https://patchwork.linux-mips.org/patch/15385/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2 years agoMIPS: pm-cps: Drop manual cache-line alignment of ready_count
Paul Burton [Thu, 2 Mar 2017 22:02:40 +0000 (14:02 -0800)]
MIPS: pm-cps: Drop manual cache-line alignment of ready_count

We allocate memory for a ready_count variable per-CPU, which is accessed
via a cached non-coherent TLB mapping to perform synchronisation between
threads within the core using LL/SC instructions. In order to ensure
that the variable is contained within its own data cache line we
allocate 2 lines worth of memory & align the resulting pointer to a line
boundary. This is however unnecessary, since kmalloc is guaranteed to
return memory which is at least cache-line aligned (see
ARCH_DMA_MINALIGN). Stop the redundant manual alignment.

Besides cleaning up the code & avoiding needless work, this has the side
effect of avoiding an arithmetic error found by Bryan on 64 bit systems
due to the 32 bit size of the former dlinesz. This led the ready_count
variable to have its upper 32b cleared erroneously for MIPS64 kernels,
causing problems when ready_count was later used on MIPS64 via cpuidle.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: 3179d37ee1ed ("MIPS: pm-cps: add PM state entry code for CPS systems")
Reported-by: Bryan O'Donoghue <bryan.odonoghue@imgtec.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@imgtec.com>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: stable <stable@vger.kernel.org> # v3.16+
Patchwork: https://patchwork.linux-mips.org/patch/15383/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2 years agoARM: 8685/1: ensure memblock-limit is pmd-aligned
Doug Berger [Thu, 29 Jun 2017 17:41:36 +0000 (18:41 +0100)]
ARM: 8685/1: ensure memblock-limit is pmd-aligned

The pmd containing memblock_limit is cleared by prepare_page_table()
which creates the opportunity for early_alloc() to allocate unmapped
memory if memblock_limit is not pmd aligned causing a boot-time hang.

Commit 965278dcb8ab ("ARM: 8356/1: mm: handle non-pmd-aligned end of RAM")
attempted to resolve this problem, but there is a path through the
adjust_lowmem_bounds() routine where if all memory regions start and
end on pmd-aligned addresses the memblock_limit will be set to
arm_lowmem_limit.

Since arm_lowmem_limit can be affected by the vmalloc early parameter,
the value of arm_lowmem_limit may not be pmd-aligned. This commit
corrects this oversight such that memblock_limit is always rounded
down to pmd-alignment.

Fixes: 965278dcb8ab ("ARM: 8356/1: mm: handle non-pmd-aligned end of RAM")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 29 Jun 2017 21:30:07 +0000 (14:30 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Need to access netdev->num_rx_queues behind an accessor in netvsc
    driver otherwise the build breaks with some configs, from Arnd
    Bergmann.

 2) Add dummy xfrm_dev_event() so that build doesn't fail when
    CONFIG_XFRM_OFFLOAD is not set. From Hangbin Liu.

 3) Don't OOPS when pfkey_msg2xfrm_state() signals an erros, from Dan
    Carpenter.

 4) Fix MCDI command size for filter operations in sfc driver, from
    Martin Habets.

 5) Fix UFO segmenting so that we don't calculate incorrect checksums,
    from Michal Kubecek.

 6) When ipv6 datagram connects fail, reset destination address and
    port. From Wei Wang.

 7) TCP disconnect must reset the cached receive DST, from WANG Cong.

 8) Fix sign extension bug on 32-bit in dev_get_stats(), from Eric
    Dumazet.

 9) fman driver has to depend on HAS_DMA, from Madalin Bucur.

10) Fix bpf pointer leak with xadd in verifier, from Daniel Borkmann.

11) Fix negative page counts with GFO, from Michal Kubecek.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits)
  sfc: fix attempt to translate invalid filter ID
  net: handle NAPI_GRO_FREE_STOLEN_HEAD case also in napi_frags_finish()
  bpf: prevent leaking pointer via xadd on unpriviledged
  arcnet: com20020-pci: add missing pdev setup in netdev structure
  arcnet: com20020-pci: fix dev_id calculation
  arcnet: com20020: remove needless base_addr assignment
  Trivial fix to spelling mistake in arc_printk message
  arcnet: change irq handler to lock irqsave
  rocker: move dereference before free
  mlxsw: spectrum_router: Fix NULL pointer dereference
  net: sched: Fix one possible panic when no destroy callback
  virtio-net: serialize tx routine during reset
  net: usb: asix88179_178a: Add support for the Belkin B2B128
  fsl/fman: add dependency on HAS_DMA
  net: prevent sign extension in dev_get_stats()
  tcp: reset sk_rx_dst in tcp_disconnect()
  net: ipv6: reset daddr and dport in sk if connect() fails
  bnx2x: Don't log mc removal needlessly
  bnxt_en: Fix netpoll handling.
  bnxt_en: Add missing logic to handle TPA end error conditions.
  ...

2 years agoMerge tag 'for-4.12/dm-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 29 Jun 2017 21:23:02 +0000 (14:23 -0700)]
Merge tag 'for-4.12/dm-fixes-5' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - dm thinp fix for crash that will occur when metadata device failure
   races with discard passdown to the underlying data device.

 - dm raid fix to not access the superblock's >= 1.9.0 'sectors' member
   unconditionally.

* tag 'for-4.12/dm-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm thin: do not queue freed thin mapping for next stage processing
  dm raid: fix oops on upgrading to extended superblock format

2 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Thu, 29 Jun 2017 21:10:37 +0000 (14:10 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Two fixes that should go into this release.

  One is an nvme regression fix from Keith, fixing a missing queue
  freeze if the controller is being reset. This causes the reset to
  hang.

  The other is a fix for a leak of the bio protection info, if smaller
  sized O_DIRECT is used. This fix should be more involved as we have
  other problematic paths in the kernel, but given as this isn't a
  regression in this series, we'll tackle those for 4.13"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: provide bio_uninit() free freeing integrity/task associations
  nvme/pci: Fix stuck nvme reset

2 years agosfc: fix attempt to translate invalid filter ID
Edward Cree [Thu, 29 Jun 2017 15:50:06 +0000 (16:50 +0100)]
sfc: fix attempt to translate invalid filter ID

When filter insertion fails with no rollback, we were trying to convert
 EFX_EF10_FILTER_ID_INVALID to an id to store in 'ids' (which is either
 vlan->uc or vlan->mc).  This would WARN_ON_ONCE and then record a bogus
 filter ID of 0x1fff, neither of which is a good thing.

Fixes: 0ccb998bf46d ("sfc: fix filter_id misinterpretation in edge case")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: handle NAPI_GRO_FREE_STOLEN_HEAD case also in napi_frags_finish()
Michal Kubeček [Thu, 29 Jun 2017 09:13:36 +0000 (11:13 +0200)]
net: handle NAPI_GRO_FREE_STOLEN_HEAD case also in napi_frags_finish()

Recently I started seeing warnings about pages with refcount -1. The
problem was traced to packets being reused after their head was merged into
a GRO packet by skb_gro_receive(). While bisecting the issue pointed to
commit c21b48cc1bbf ("net: adjust skb->truesize in ___pskb_trim()") and
I have never seen it on a kernel with it reverted, I believe the real
problem appeared earlier when the option to merge head frag in GRO was
implemented.

Handling NAPI_GRO_FREE_STOLEN_HEAD state was only added to GRO_MERGED_FREE
branch of napi_skb_finish() so that if the driver uses napi_gro_frags()
and head is merged (which in my case happens after the skb_condense()
call added by the commit mentioned above), the skb is reused including the
head that has been merged. As a result, we release the page reference
twice and eventually end up with negative page refcount.

To fix the problem, handle NAPI_GRO_FREE_STOLEN_HEAD in napi_frags_finish()
the same way it's done in napi_skb_finish().

Fixes: d7e8883cfcf4 ("net: make GRO aware of skb->head_frag")
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobpf: prevent leaking pointer via xadd on unpriviledged
Daniel Borkmann [Thu, 29 Jun 2017 01:04:59 +0000 (03:04 +0200)]
bpf: prevent leaking pointer via xadd on unpriviledged

Leaking kernel addresses on unpriviledged is generally disallowed,
for example, verifier rejects the following:

  0: (b7) r0 = 0
  1: (18) r2 = 0xffff897e82304400
  3: (7b) *(u64 *)(r1 +48) = r2
  R2 leaks addr into ctx

Doing pointer arithmetic on them is also forbidden, so that they
don't turn into unknown value and then get leaked out. However,
there's xadd as a special case, where we don't check the src reg
for being a pointer register, e.g. the following will pass:

  0: (b7) r0 = 0
  1: (7b) *(u64 *)(r1 +48) = r0
  2: (18) r2 = 0xffff897e82304400 ; map
  4: (db) lock *(u64 *)(r1 +48) += r2
  5: (95) exit

We could store the pointer into skb->cb, loose the type context,
and then read it out from there again to leak it eventually out
of a map value. Or more easily in a different variant, too:

   0: (bf) r6 = r1
   1: (7a) *(u64 *)(r10 -8) = 0
   2: (bf) r2 = r10
   3: (07) r2 += -8
   4: (18) r1 = 0x0
   6: (85) call bpf_map_lookup_elem#1
   7: (15) if r0 == 0x0 goto pc+3
   R0=map_value(ks=8,vs=8,id=0),min_value=0,max_value=0 R6=ctx R10=fp
   8: (b7) r3 = 0
   9: (7b) *(u64 *)(r0 +0) = r3
  10: (db) lock *(u64 *)(r0 +0) += r6
  11: (b7) r0 = 0
  12: (95) exit

  from 7 to 11: R0=inv,min_value=0,max_value=0 R6=ctx R10=fp
  11: (b7) r0 = 0
  12: (95) exit

Prevent this by checking xadd src reg for pointer types. Also
add a couple of test cases related to this.

Fixes: 1be7f75d1668 ("bpf: enable non-root eBPF programs")
Fixes: 17a5267067f3 ("bpf: verifier (add verifier core)")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoperf/x86/intel/uncore: Fix wrong box pointer check
Kan Liang [Thu, 29 Jun 2017 19:09:26 +0000 (12:09 -0700)]
perf/x86/intel/uncore: Fix wrong box pointer check

Should not init a NULL box. It will cause system crash.
The issue looks like caused by a typo.

This was not noticed because there is no NULL box. Also, for most
boxes, they are enabled by default. The init code is not critical.

Fixes: fff4b87e594a ("perf/x86/intel/uncore: Make package handling more robust")
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170629190926.2456-1-kan.liang@intel.com
2 years agoMerge branch 'arcnet-fixes'
David S. Miller [Thu, 29 Jun 2017 19:18:38 +0000 (15:18 -0400)]
Merge branch 'arcnet-fixes'

Michael Grzeschik says:

====================
arcnet: Collection of latest fixes

Here we sum up the recent fixes I collected on the way to use and
stabilise the framework. Part of it is an possible deadlock that we
prevent as well to fix the calculation of the dev_id that can be setup
by an rotary encoder. Beside that we added an trivial spelling patch and
fix some wrong and missing assignments that improves the code footprint.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoarcnet: com20020-pci: add missing pdev setup in netdev structure
Michael Grzeschik [Wed, 28 Jun 2017 16:28:37 +0000 (18:28 +0200)]
arcnet: com20020-pci: add missing pdev setup in netdev structure

We add the pdev data to the pci devices netdev structure. This way
the interface get consistent device names in the userspace (udev).

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoarcnet: com20020-pci: fix dev_id calculation
Michael Grzeschik [Wed, 28 Jun 2017 16:28:36 +0000 (18:28 +0200)]
arcnet: com20020-pci: fix dev_id calculation

The dev_id was miscalculated. Only the two bits 4-5 are relevant for the
MA1 card. PCIARC1 and PCIFB2 use the four bits 4-7 for id selection.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoarcnet: com20020: remove needless base_addr assignment
Michael Grzeschik [Wed, 28 Jun 2017 16:28:35 +0000 (18:28 +0200)]
arcnet: com20020: remove needless base_addr assignment

The assignment is superfluous.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoTrivial fix to spelling mistake in arc_printk message
Colin Ian King [Wed, 28 Jun 2017 16:28:34 +0000 (18:28 +0200)]
Trivial fix to spelling mistake in arc_printk message

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoarcnet: change irq handler to lock irqsave
Michael Grzeschik [Wed, 28 Jun 2017 16:28:33 +0000 (18:28 +0200)]
arcnet: change irq handler to lock irqsave

This patch prevents the arcnet driver from the following deadlock.

[   41.273910] ======================================================
[   41.280397] [ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ]
[   41.287433] 4.4.0-00034-gc0ae784 #536 Not tainted
[   41.292366] ------------------------------------------------------
[   41.298863] arcecho/233 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire:
[   41.305628]  (&(&lp->lock)->rlock){+.+...}, at: [<bf083bc8>] arcnet_send_packet+0x60/0x1c0 [arcnet]
[   41.315199]
[   41.315199] and this task is already holding:
[   41.321324]  (_xmit_ARCNET#2){+.-...}, at: [<c06b934c>] packet_direct_xmit+0xfc/0x1c8
[   41.329593] which would create a new lock dependency:
[   41.334893]  (_xmit_ARCNET#2){+.-...} -> (&(&lp->lock)->rlock){+.+...}
[   41.341801]
[   41.341801] but this new dependency connects a SOFTIRQ-irq-safe lock:
[   41.350108]  (_xmit_ARCNET#2){+.-...}
... which became SOFTIRQ-irq-safe at:
[   41.357539]   [<c06f8fc8>] _raw_spin_lock+0x30/0x40
[   41.362677]   [<c063ab8c>] dev_watchdog+0x5c/0x264
[   41.367723]   [<c0094edc>] call_timer_fn+0x6c/0xf4
[   41.372759]   [<c00950b8>] run_timer_softirq+0x154/0x210
[   41.378340]   [<c0036b30>] __do_softirq+0x144/0x298
[   41.383469]   [<c0036fb4>] irq_exit+0xcc/0x130
[   41.388138]   [<c0085c50>] __handle_domain_irq+0x60/0xb4
[   41.393728]   [<c0014578>] __irq_svc+0x58/0x78
[   41.398402]   [<c0010274>] arch_cpu_idle+0x24/0x3c
[   41.403443]   [<c007127c>] cpu_startup_entry+0x1f8/0x25c
[   41.409029]   [<c09adc90>] start_kernel+0x3c0/0x3cc
[   41.414170]
[   41.414170] to a SOFTIRQ-irq-unsafe lock:
[   41.419931]  (&(&lp->lock)->rlock){+.+...}
... which became SOFTIRQ-irq-unsafe at:
[   41.427996] ...  [<c06f8fc8>] _raw_spin_lock+0x30/0x40
[   41.433409]   [<bf083d54>] arcnet_interrupt+0x2c/0x800 [arcnet]
[   41.439646]   [<c0089120>] handle_nested_irq+0x8c/0xec
[   41.445063]   [<c03c1170>] regmap_irq_thread+0x190/0x314
[   41.450661]   [<c0087244>] irq_thread_fn+0x1c/0x34
[   41.455700]   [<c0087548>] irq_thread+0x13c/0x1dc
[   41.460649]   [<c0050f10>] kthread+0xe4/0xf8
[   41.465158]   [<c000f810>] ret_from_fork+0x14/0x24
[   41.470207]
[   41.470207] other info that might help us debug this:
[   41.470207]
[   41.478627]  Possible interrupt unsafe locking scenario:
[   41.478627]
[   41.485763]        CPU0                    CPU1
[   41.490521]        ----                    ----
[   41.495279]   lock(&(&lp->lock)->rlock);
[   41.499414]                                local_irq_disable();
[   41.505636]                                lock(_xmit_ARCNET#2);
[   41.511967]                                lock(&(&lp->lock)->rlock);
[   41.518741]   <Interrupt>
[   41.521490]     lock(_xmit_ARCNET#2);
[   41.525356]
[   41.525356]  *** DEADLOCK ***
[   41.525356]
[   41.531587] 1 lock held by arcecho/233:
[   41.535617]  #0:  (_xmit_ARCNET#2){+.-...}, at: [<c06b934c>] packet_direct_xmit+0xfc/0x1c8
[   41.544355]
the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
[   41.552362] -> (_xmit_ARCNET#2){+.-...} ops: 27 {
[   41.557357]    HARDIRQ-ON-W at:
[   41.560664]                     [<c06f8fc8>] _raw_spin_lock+0x30/0x40
[   41.567445]                     [<c063ba28>] dev_deactivate_many+0x114/0x304
[   41.574866]                     [<c063bc3c>] dev_deactivate+0x24/0x38
[   41.581646]                     [<c0630374>] linkwatch_do_dev+0x40/0x74
[   41.588613]                     [<c06305d8>] __linkwatch_run_queue+0xec/0x140
[   41.596120]                     [<c0630658>] linkwatch_event+0x2c/0x34
[   41.602991]                     [<c004af30>] process_one_work+0x188/0x40c
[   41.610131]                     [<c004b200>] worker_thread+0x4c/0x480
[   41.616912]                     [<c0050f10>] kthread+0xe4/0xf8
[   41.623048]                     [<c000f810>] ret_from_fork+0x14/0x24
[   41.629735]    IN-SOFTIRQ-W at:
[   41.633039]                     [<c06f8fc8>] _raw_spin_lock+0x30/0x40
[   41.639820]                     [<c063ab8c>] dev_watchdog+0x5c/0x264
[   41.646508]                     [<c0094edc>] call_timer_fn+0x6c/0xf4
[   41.653190]                     [<c00950b8>] run_timer_softirq+0x154/0x210
[   41.660425]                     [<c0036b30>] __do_softirq+0x144/0x298
[   41.667201]                     [<c0036fb4>] irq_exit+0xcc/0x130
[   41.673518]                     [<c0085c50>] __handle_domain_irq+0x60/0xb4
[   41.680754]                     [<c0014578>] __irq_svc+0x58/0x78
[   41.687077]                     [<c0010274>] arch_cpu_idle+0x24/0x3c
[   41.693769]                     [<c007127c>] cpu_startup_entry+0x1f8/0x25c
[   41.701006]                     [<c09adc90>] start_kernel+0x3c0/0x3cc
[   41.707791]    INITIAL USE at:
[   41.711003]                    [<c06f8fc8>] _raw_spin_lock+0x30/0x40
[   41.717696]                    [<c063ba28>] dev_deactivate_many+0x114/0x304
[   41.725026]                    [<c063bc3c>] dev_deactivate+0x24/0x38
[   41.731718]                    [<c0630374>] linkwatch_do_dev+0x40/0x74
[   41.738593]                    [<c06305d8>] __linkwatch_run_queue+0xec/0x140
[   41.746011]                    [<c0630658>] linkwatch_event+0x2c/0x34
[   41.752789]                    [<c004af30>] process_one_work+0x188/0x40c
[   41.759847]                    [<c004b200>] worker_thread+0x4c/0x480
[   41.766541]                    [<c0050f10>] kthread+0xe4/0xf8
[   41.772596]                    [<c000f810>] ret_from_fork+0x14/0x24
[   41.779198]  }
[   41.780945]  ... key      at: [<c124d620>] netdev_xmit_lock_key+0x38/0x1c8
[   41.788192]  ... acquired at:
[   41.791309]    [<c007bed8>] lock_acquire+0x70/0x90
[   41.796361]    [<c06f9140>] _raw_spin_lock_irqsave+0x40/0x54
[   41.802324]    [<bf083bc8>] arcnet_send_packet+0x60/0x1c0 [arcnet]
[   41.808844]    [<c06b9380>] packet_direct_xmit+0x130/0x1c8
[   41.814622]    [<c06bc7e4>] packet_sendmsg+0x3b8/0x680
[   41.820034]    [<c05fe8b0>] sock_sendmsg+0x14/0x24
[   41.825091]    [<c05ffd68>] SyS_sendto+0xb8/0xe0
[   41.829956]    [<c05ffda8>] SyS_send+0x18/0x20
[   41.834638]    [<c000f780>] ret_fast_syscall+0x0/0x1c
[   41.839954]
[   41.841514]
the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock:
[   41.850302] -> (&(&lp->lock)->rlock){+.+...} ops: 5 {
[   41.855644]    HARDIRQ-ON-W at:
[   41.858945]                     [<c06f8fc8>] _raw_spin_lock+0x30/0x40
[   41.865726]                     [<bf083d54>] arcnet_interrupt+0x2c/0x800 [arcnet]
[   41.873607]                     [<c0089120>] handle_nested_irq+0x8c/0xec
[   41.880666]                     [<c03c1170>] regmap_irq_thread+0x190/0x314
[   41.887901]                     [<c0087244>] irq_thread_fn+0x1c/0x34
[   41.894593]                     [<c0087548>] irq_thread+0x13c/0x1dc
[   41.901195]                     [<c0050f10>] kthread+0xe4/0xf8
[   41.907338]                     [<c000f810>] ret_from_fork+0x14/0x24
[   41.914025]    SOFTIRQ-ON-W at:
[   41.917328]                     [<c06f8fc8>] _raw_spin_lock+0x30/0x40
[   41.924106]                     [<bf083d54>] arcnet_interrupt+0x2c/0x800 [arcnet]
[   41.931981]                     [<c0089120>] handle_nested_irq+0x8c/0xec
[   41.939028]                     [<c03c1170>] regmap_irq_thread+0x190/0x314
[   41.946264]                     [<c0087244>] irq_thread_fn+0x1c/0x34
[   41.952954]                     [<c0087548>] irq_thread+0x13c/0x1dc
[   41.959548]                     [<c0050f10>] kthread+0xe4/0xf8
[   41.965689]                     [<c000f810>] ret_from_fork+0x14/0x24
[   41.972379]    INITIAL USE at:
[   41.975595]                    [<c06f8fc8>] _raw_spin_lock+0x30/0x40
[   41.982283]                    [<bf083d54>] arcnet_interrupt+0x2c/0x800 [arcnet]
[   41.990063]                    [<c0089120>] handle_nested_irq+0x8c/0xec
[   41.997027]                    [<c03c1170>] regmap_irq_thread+0x190/0x314
[   42.004172]                    [<c0087244>] irq_thread_fn+0x1c/0x34
[   42.010766]                    [<c0087548>] irq_thread+0x13c/0x1dc
[   42.017267]                    [<c0050f10>] kthread+0xe4/0xf8
[   42.023314]                    [<c000f810>] ret_from_fork+0x14/0x24
[   42.029903]  }
[   42.031648]  ... key      at: [<bf0854cc>] __key.42091+0x0/0xfffff0f8 [arcnet]
[   42.039255]  ... acquired at:
[   42.042372]    [<c007bed8>] lock_acquire+0x70/0x90
[   42.047413]    [<c06f9140>] _raw_spin_lock_irqsave+0x40/0x54
[   42.053364]    [<bf083bc8>] arcnet_send_packet+0x60/0x1c0 [arcnet]
[   42.059872]    [<c06b9380>] packet_direct_xmit+0x130/0x1c8
[   42.065634]    [<c06bc7e4>] packet_sendmsg+0x3b8/0x680
[   42.071030]    [<c05fe8b0>] sock_sendmsg+0x14/0x24
[   42.076069]    [<c05ffd68>] SyS_sendto+0xb8/0xe0
[   42.080926]    [<c05ffda8>] SyS_send+0x18/0x20
[   42.085601]    [<c000f780>] ret_fast_syscall+0x0/0x1c
[   42.090918]
[   42.092481]
[   42.092481] stack backtrace:
[   42.097065] CPU: 0 PID: 233 Comm: arcecho Not tainted 4.4.0-00034-gc0ae784 #536
[   42.104751] Hardware name: Generic AM33XX (Flattened Device Tree)
[   42.111183] [<c0017ec8>] (unwind_backtrace) from [<c00139d0>] (show_stack+0x10/0x14)
[   42.119337] [<c00139d0>] (show_stack) from [<c02a82c4>] (dump_stack+0x8c/0x9c)
[   42.126937] [<c02a82c4>] (dump_stack) from [<c0078260>] (check_usage+0x4bc/0x63c)
[   42.134815] [<c0078260>] (check_usage) from [<c0078438>] (check_irq_usage+0x58/0xb0)
[   42.142964] [<c0078438>] (check_irq_usage) from [<c007aaa0>] (__lock_acquire+0x1524/0x20b0)
[   42.151740] [<c007aaa0>] (__lock_acquire) from [<c007bed8>] (lock_acquire+0x70/0x90)
[   42.159886] [<c007bed8>] (lock_acquire) from [<c06f9140>] (_raw_spin_lock_irqsave+0x40/0x54)
[   42.168768] [<c06f9140>] (_raw_spin_lock_irqsave) from [<bf083bc8>] (arcnet_send_packet+0x60/0x1c0 [arcnet])
[   42.179115] [<bf083bc8>] (arcnet_send_packet [arcnet]) from [<c06b9380>] (packet_direct_xmit+0x130/0x1c8)
[   42.189182] [<c06b9380>] (packet_direct_xmit) from [<c06bc7e4>] (packet_sendmsg+0x3b8/0x680)
[   42.198059] [<c06bc7e4>] (packet_sendmsg) from [<c05fe8b0>] (sock_sendmsg+0x14/0x24)
[   42.206199] [<c05fe8b0>] (sock_sendmsg) from [<c05ffd68>] (SyS_sendto+0xb8/0xe0)
[   42.213978] [<c05ffd68>] (SyS_sendto) from [<c05ffda8>] (SyS_send+0x18/0x20)
[   42.221388] [<c05ffda8>] (SyS_send) from [<c000f780>] (ret_fast_syscall+0x0/0x1c)

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
   ---
   v1 -> v2: removed unneeded zero assignment of flags
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agorocker: move dereference before free
Dan Carpenter [Wed, 28 Jun 2017 11:44:21 +0000 (14:44 +0300)]
rocker: move dereference before free

My static checker complains that ofdpa_neigh_del() can sometimes free
"found".   It just makes sense to use it first before deleting it.

Fixes: ecf244f753e0 ("rocker: fix maybe-uninitialized warning")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: spectrum_router: Fix NULL pointer dereference
Ido Schimmel [Wed, 28 Jun 2017 06:03:12 +0000 (09:03 +0300)]
mlxsw: spectrum_router: Fix NULL pointer dereference

In case a VLAN device is enslaved to a bridge we shouldn't create a
router interface (RIF) for it when it's configured with an IP address.
This is already handled by the driver for other types of netdevs, such
as physical ports and LAG devices.

If this IP address is then removed and the interface is subsequently
unlinked from the bridge, a NULL pointer dereference can happen, as the
original 802.1d FID was replaced with an rFID which was then deleted.

To reproduce:
$ ip link set dev enp3s0np9 up
$ ip link add name enp3s0np9.111 link enp3s0np9 type vlan id 111
$ ip link set dev enp3s0np9.111 up
$ ip link add name br0 type bridge
$ ip link set dev br0 up
$ ip link set enp3s0np9.111 master br0
$ ip address add dev enp3s0np9.111 192.168.0.1/24
$ ip address del dev enp3s0np9.111 192.168.0.1/24
$ ip link set dev enp3s0np9.111 nomaster

Fixes: 99724c18fc66 ("mlxsw: spectrum: Introduce support for router interfaces")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: Petr Machata <petrm@mellanox.com>
Tested-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: sched: Fix one possible panic when no destroy callback
Gao Feng [Wed, 28 Jun 2017 04:53:54 +0000 (12:53 +0800)]
net: sched: Fix one possible panic when no destroy callback

When qdisc fail to init, qdisc_create would invoke the destroy callback
to cleanup. But there is no check if the callback exists really. So it
would cause the panic if there is no real destroy callback like the qdisc
codel, fq, and so on.

Take codel as an example following:
When a malicious user constructs one invalid netlink msg, it would cause
codel_init->codel_change->nla_parse_nested failed.
Then kernel would invoke the destroy callback directly but qdisc codel
doesn't define one. It causes one panic as a result.

Now add one the check for destroy to avoid the possible panic.

Fixes: 87b60cfacf9f ("net_sched: fix error recovery at qdisc creation")
Signed-off-by: Gao Feng <gfree.wind@vip.163.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agovirtio-net: serialize tx routine during reset
Jason Wang [Wed, 28 Jun 2017 01:51:03 +0000 (09:51 +0800)]
virtio-net: serialize tx routine during reset

We don't hold any tx lock when trying to disable TX during reset, this
would lead a use after free since ndo_start_xmit() tries to access
the virtqueue which has already been freed. Fix this by using
netif_tx_disable() before freeing the vqs, this could make sure no tx
after vq freeing.

Reported-by: Jean-Philippe Menil <jpmenil@gmail.com>
Tested-by: Jean-Philippe Menil <jpmenil@gmail.com>
Fixes commit f600b6905015 ("virtio_net: Add XDP support")
Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Robert McCabe <robert.mccabe@rockwellcollins.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoftrace: Fix regression with module command in stack_trace_filter
Steven Rostedt (VMware) [Thu, 29 Jun 2017 14:05:45 +0000 (10:05 -0400)]
ftrace: Fix regression with module command in stack_trace_filter

When doing the following command:

 # echo ":mod:kvm_intel" > /sys/kernel/tracing/stack_trace_filter

it triggered a crash.

This happened with the clean up of probes. It required all callers to the
regex function (doing ftrace filtering) to have ops->private be a pointer to
a trace_array. But for the stack tracer, that is not the case.

Allow for the ops->private to be NULL, and change the function command
callbacks to handle the trace_array pointer being NULL as well.

Fixes: d2afd57a4b96 ("tracing/ftrace: Allow instances to have their own function probes")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2 years agoRevert "pinctrl: rockchip: avoid hardirq-unsafe functions in irq_chip"
Brian Norris [Fri, 23 Jun 2017 20:59:11 +0000 (13:59 -0700)]
Revert "pinctrl: rockchip: avoid hardirq-unsafe functions in irq_chip"

This reverts commit 88bb94216f59e10802aaf78c858a4146085faf18.

It introduced a new CONFIG_DEBUG_ATOMIC_SLEEP warning in v4.12-rc1:

[ 7226.716713] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:238
[ 7226.716716] in_atomic(): 0, irqs_disabled(): 0, pid: 1708, name: bash
[ 7226.716722] CPU: 1 PID: 1708 Comm: bash Not tainted 4.12.0-rc6+ #1213
[ 7226.716724] Hardware name: Google Kevin (DT)
[ 7226.716726] Call trace:
[ 7226.716738] [<ffffff8008089928>] dump_backtrace+0x0/0x24c
[ 7226.716743] [<ffffff8008089b94>] show_stack+0x20/0x28
[ 7226.716749] [<ffffff8008371370>] dump_stack+0x90/0xb0
[ 7226.716755] [<ffffff80080cd2a0>] ___might_sleep+0x10c/0x124
[ 7226.716760] [<ffffff80080cd330>] __might_sleep+0x78/0x88
[ 7226.716765] [<ffffff800879e210>] mutex_lock+0x2c/0x64
[ 7226.716771] [<ffffff80083ad678>] rockchip_irq_bus_lock+0x30/0x3c
[ 7226.716777] [<ffffff80080f6d40>] __irq_get_desc_lock+0x78/0x98
[ 7226.716782] [<ffffff80080f7e6c>] irq_set_irq_wake+0x44/0x12c
[ 7226.716787] [<ffffff8008486e18>] dev_pm_arm_wake_irq+0x4c/0x58
[ 7226.716792] [<ffffff800848b80c>] device_wakeup_arm_wake_irqs+0x3c/0x58
[ 7226.716796] [<ffffff80084896fc>] dpm_suspend_noirq+0xf8/0x3a0
[ 7226.716800] [<ffffff80080f1384>] suspend_devices_and_enter+0x1a4/0x9a8
[ 7226.716803] [<ffffff80080f21ec>] pm_suspend+0x664/0x6a4
[ 7226.716807] [<ffffff80080f04d8>] state_store+0xd4/0xf8
...

It was reported on -rc1, and it's still not fixed in -rc6, so it should
just be reverted.

Cc: John Keeping <john@metanate.com>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2 years agogpio: acpi: Skip _AEI entries without a handler rather then aborting the scan
Hans de Goede [Fri, 23 Jun 2017 07:26:13 +0000 (09:26 +0200)]
gpio: acpi: Skip _AEI entries without a handler rather then aborting the scan

acpi_walk_resources will stop as soon as the callback passed in returns
an error status. On a x86 tablet I have the first GpioInt in the _AEI
resource list has no handler defined in the DSDT, causing
acpi_walk_resources to abort scanning the rest of the resource list,
which does define valid ACPI GPIO events.

This commit changes the return for not finding a handler from
AE_BAD_PARAMETER to AE_OK so that the rest of the resource list will
get scanned normally in case of missing event handlers.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2 years agogpiolib: fix filtering out unwanted events
Bartosz Golaszewski [Fri, 23 Jun 2017 11:45:16 +0000 (13:45 +0200)]
gpiolib: fix filtering out unwanted events

GPIOEVENT_REQUEST_BOTH_EDGES is not a single flag, but a binary OR of
GPIOEVENT_REQUEST_RISING_EDGE and GPIOEVENT_REQUEST_FALLING_EDGE.

The expression 'le->eflags & GPIOEVENT_REQUEST_BOTH_EDGES' we'll get
evaluated to true even if only one event type was requested.

Fix it by checking both RISING & FALLING flags explicitly.

Cc: stable@vger.kernel.org
Fixes: 61f922db7221 ("gpio: userspace ABI for reading GPIO line events")
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2 years agoarch: remove unused macro/function thread_saved_pc()
Tobias Klauser [Wed, 28 Jun 2017 13:30:02 +0000 (15:30 +0200)]
arch: remove unused macro/function thread_saved_pc()

The only user of thread_saved_pc() in non-arch-specific code was removed
in commit 8243d5597793 ("sched/core: Remove pointless printout in
sched_show_task()").  Remove the implementations as well.

Some architectures use thread_saved_pc() in their arch-specific code.
Leave their thread_saved_pc() intact.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoblock: provide bio_uninit() free freeing integrity/task associations
Jens Axboe [Wed, 28 Jun 2017 21:30:13 +0000 (15:30 -0600)]
block: provide bio_uninit() free freeing integrity/task associations

Wen reports significant memory leaks with DIF and O_DIRECT:

"With nvme devive + T10 enabled, On a system it has 256GB and started
logging /proc/meminfo & /proc/slabinfo for every minute and in an hour
it increased by 15968128 kB or ~15+GB.. Approximately 256 MB / minute
leaking.

/proc/meminfo | grep SUnreclaim...

SUnreclaim:      6752128 kB
SUnreclaim:      6874880 kB
SUnreclaim:      7238080 kB
....
SUnreclaim:     22307264 kB
SUnreclaim:     22485888 kB
SUnreclaim:     22720256 kB

When testcases with T10 enabled call into __blkdev_direct_IO_simple,
code doesn't free memory allocated by bio_integrity_alloc. The patch
fixes the issue. HTX has been run with +60 hours without failure."

Since __blkdev_direct_IO_simple() allocates the bio on the stack, it
doesn't go through the regular bio free. This means that any ancillary
data allocated with the bio through the stack is not freed. Hence, we
can leak the integrity data associated with the bio, if the device is
using DIF/DIX.

Fix this by providing a bio_uninit() and export it, so that we can use
it to free this data. Note that this is a minimal fix for this issue.
Any current user of bio's that are allocated outside of
bio_alloc_bioset() suffers from this issue, most notably some drivers.
We will fix those in a more comprehensive patch for 4.13. This also
means that the commit marked as being fixed by this isn't the real
culprit, it's just the most obvious one out there.

Fixes: 542ff7bf18c6 ("block: new direct I/O implementation")
Reported-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoMerge tag 'nfs-for-4.12-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Wed, 28 Jun 2017 20:27:15 +0000 (13:27 -0700)]
Merge tag 'nfs-for-4.12-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Bugfixes include:

   - stable fix for exclusive create if the server supports the umask
     attribute

   - trunking detection should handle ERESTARTSYS/EINTR

   - stable fix for a race in the LAYOUTGET function

   - stable fix to revert "nfs_rename() handle -ERESTARTSYS dentry left
     behind"

   - nfs4_callback_free_slot() cannot call nfs4_slot_tbl_drain_complete()"

* tag 'nfs-for-4.12-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4.1: nfs4_callback_free_slot() cannot call nfs4_slot_tbl_drain_complete()
  Revert "NFS: nfs_rename() handle -ERESTARTSYS dentry left behind"
  NFSv4.1: Fix a race in nfs4_proc_layoutget
  NFS: Trunking detection should handle ERESTARTSYS/EINTR
  NFSv4.2: Don't send mode again in post-EXCLUSIVE4_1 SETATTR with umask

2 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Wed, 28 Jun 2017 20:22:26 +0000 (13:22 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "This is the final set of fixes for -rc8, just a few i915 and one
  vmwgfx ones.

  I'm off on holidays for a week, so if anything shows up for fixes I've
  asked Daniel or Sean Paul to herd it in the right direction"

[ The additional etnaviv fixes were already herded towards me as seen in
  my previous pull - Linus ]

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/vmwgfx: Free hash table allocated by cmdbuf managed res mgr
  drm/i915: Disable EXEC_OBJECT_ASYNC when doing relocations
  drm/i915: Hold struct_mutex for per-file stats in debugfs/i915_gem_object
  drm/i915: Retire the VMA's fence tracker before unbinding

2 years agoMerge branch 'etnaviv/fixes' of git://git.pengutronix.de/git/lst/linux
Linus Torvalds [Wed, 28 Jun 2017 20:13:48 +0000 (13:13 -0700)]
Merge branch 'etnaviv/fixes' of git://git.pengutronix.de/git/lst/linux

Pull drm/etnaviv fixes from Lucas Stach:
 "I realized I just missed the cut-off point for the final drm fixes
  pull, but I have 2 more etnaviv fixes that need to go into 4.12, as
  they fix fallout from the explicit sync work introduced in the last
  merge window"

[ Pulling directly because Dave is on vacation. Noted by Daniel Vetter,
  and acked by Dave Airlie  - Linus ]

* 'etnaviv/fixes' of git://git.pengutronix.de/git/lst/linux:
  drm/etnaviv: Fix implicit/explicit sync sense inversion
  drm/etnaviv: fix submit flags getting overwritten by BO content

2 years agoiommu/amd: Fix interrupt remapping when disable guest_mode
Suravee Suthikulpanit [Mon, 26 Jun 2017 09:28:04 +0000 (04:28 -0500)]
iommu/amd: Fix interrupt remapping when disable guest_mode

Pass-through devices to VM guest can get updated IRQ affinity
information via irq_set_affinity() when not running in guest mode.
Currently, AMD IOMMU driver in GA mode ignores the updated information
if the pass-through device is setup to use vAPIC regardless of guest_mode.
This could cause invalid interrupt remapping.

Also, the guest_mode bit should be set and cleared only when
SVM updates posted-interrupt interrupt remapping information.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: Joerg Roedel <jroedel@suse.de>
Fixes: d98de49a53e48 ('iommu/amd: Enable vAPIC interrupt remapping mode by default')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2 years agoovl: don't set origin on broken lower hardlink
Miklos Szeredi [Wed, 28 Jun 2017 11:41:22 +0000 (13:41 +0200)]
ovl: don't set origin on broken lower hardlink

When copying up a file that has multiple hard links we need to break any
association with the origin file.  This makes copy-up be essentially an
atomic replace.

The new file has nothing to do with the old one (except having the same
data and metadata initially), so don't set the overlay.origin attribute.

We can relax this in the future when we are able to index upper object by
origin.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 3a1e819b4e80 ("ovl: store file handle of lower inode on copy up")

2 years agoovl: copy-up: don't unlock between lookup and link
Miklos Szeredi [Wed, 28 Jun 2017 11:41:22 +0000 (13:41 +0200)]
ovl: copy-up: don't unlock between lookup and link

Nothing prevents mischief on upper layer while we are busy copying up the
data.

Move the lookup right before the looked up dentry is actually used.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 01ad3eb8a073 ("ovl: concurrent copy up of regular files")
Cc: <stable@vger.kernel.org> # v4.11
2 years agoALSA: hda - Fix endless loop of codec configure
Takashi Iwai [Wed, 28 Jun 2017 10:02:02 +0000 (12:02 +0200)]
ALSA: hda - Fix endless loop of codec configure

azx_codec_configure() loops over the codecs found on the given
controller via a linked list.  The code used to work in the past, but
in the current version, this may lead to an endless loop when a codec
binding returns an error.

The culprit is that the snd_hda_codec_configure() unregisters the
device upon error, and this eventually deletes the given codec object
from the bus.  Since the list is initialized via list_del_init(), the
next object points to the same device itself.  This behavior change
was introduced at splitting the HD-audio code code, and forgotten to
adapt it here.

For fixing this bug, just use a *_safe() version of list iteration.

Fixes: d068ebc25e6e ("ALSA: hda - Move some codes up to hdac_bus struct")
Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2 years agodrm/etnaviv: Fix implicit/explicit sync sense inversion
Daniel Stone [Thu, 22 Jun 2017 11:22:22 +0000 (12:22 +0100)]
drm/etnaviv: Fix implicit/explicit sync sense inversion

We were reading the no-implicit sync flag the wrong way around,
synchronizing too much for the explicit case, and not at all for the
implicit case. Oops.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2 years agodrm/etnaviv: fix submit flags getting overwritten by BO content
Lucas Stach [Tue, 27 Jun 2017 14:02:51 +0000 (16:02 +0200)]
drm/etnaviv: fix submit flags getting overwritten by BO content

The addition of the flags member to etnaviv_gem_submit structure didn't
take into account that the last member of this structure is a variable
length array.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2 years agoMerge tag 'drm-intel-fixes-2017-06-27' of git://anongit.freedesktop.org/git/drm-intel...
Dave Airlie [Wed, 28 Jun 2017 07:07:15 +0000 (17:07 +1000)]
Merge tag 'drm-intel-fixes-2017-06-27' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes

Just a few minor fixes. Important one is the execbuf async fix (aka
ANDROID_native_sync). There was another patch for a display coherency
corner case on APL, but we've random-walked in that space too much,
and the cherry-pick looked really invasive.

* tag 'drm-intel-fixes-2017-06-27' of git://anongit.freedesktop.org/git/drm-intel:
  drm/i915: Disable EXEC_OBJECT_ASYNC when doing relocations
  drm/i915: Hold struct_mutex for per-file stats in debugfs/i915_gem_object
  drm/i915: Retire the VMA's fence tracker before unbinding

2 years agoMerge branch 'vmwgfx-fixes-4.12' of git://people.freedesktop.org/~thomash/linux into...
Dave Airlie [Wed, 28 Jun 2017 07:06:58 +0000 (17:06 +1000)]
Merge branch 'vmwgfx-fixes-4.12' of git://people.freedesktop.org/~thomash/linux into drm-fixes

Single vmwgfx fix
* 'vmwgfx-fixes-4.12' of git://people.freedesktop.org/~thomash/linux:
  drm/vmwgfx: Free hash table allocated by cmdbuf managed res mgr

2 years agoALSA: hda - set input_path bitmap to zero after moving it to new place
Hui Wang [Wed, 28 Jun 2017 00:59:16 +0000 (08:59 +0800)]
ALSA: hda - set input_path bitmap to zero after moving it to new place

Recently we met a problem, the codec has valid adcs and input pins,
and they can form valid input paths, but the driver does not build
valid controls for them like "Mic boost", "Capture Volume" and
"Capture Switch".

Through debugging, I found the driver needs to shrink the invalid
adcs and input paths for this machine, so it will move the whole
column bitmap value to the previous column, after moving it, the
driver forgets to set the original column bitmap value to zero, as a
result, the driver will invalidate the path whose index value is the
original colume bitmap value. After executing this function, all
valid input paths are invalidated by a mistake, there are no any
valid input paths, so the driver won't build controls for them.

Fixes: 3a65bcdc577a ("ALSA: hda - Fix inconsistent input_paths after ADC reduction")
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2 years agoNFSv4.1: nfs4_callback_free_slot() cannot call nfs4_slot_tbl_drain_complete()
Trond Myklebust [Tue, 27 Jun 2017 21:40:50 +0000 (17:40 -0400)]
NFSv4.1: nfs4_callback_free_slot() cannot call nfs4_slot_tbl_drain_complete()

The current code works only for the case where we have exactly one slot,
which is no longer true.
nfs4_free_slot() will automatically declare the callback channel to be
drained when all slots have been returned.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2 years agoRevert "NFS: nfs_rename() handle -ERESTARTSYS dentry left behind"
Benjamin Coddington [Fri, 16 Jun 2017 15:12:59 +0000 (11:12 -0400)]
Revert "NFS: nfs_rename() handle -ERESTARTSYS dentry left behind"

This reverts commit 920b4530fb80430ff30ef83efe21ba1fa5623731 which could
call d_move() without holding the directory's i_mutex, and reverts commit
d4ea7e3c5c0e341c15b073016dbf3ab6c65f12f3 "NFS: Fix old dentry rehash after
move", which was a follow-up fix.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: 920b4530fb80 ("NFS: nfs_rename() handle -ERESTARTSYS dentry left behind")
Cc: stable@vger.kernel.org # v4.10+
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2 years agoNFSv4.1: Fix a race in nfs4_proc_layoutget
Trond Myklebust [Tue, 27 Jun 2017 21:33:38 +0000 (17:33 -0400)]
NFSv4.1: Fix a race in nfs4_proc_layoutget

If the task calling layoutget is signalled, then it is possible for the
calls to nfs4_sequence_free_slot() and nfs4_layoutget_prepare() to race,
in which case we leak a slot.
The fix is to move the call to nfs4_sequence_free_slot() into the
nfs4_layoutget_release() so that it gets called at task teardown time.

Fixes: 2e80dbe7ac51 ("NFSv4.1: Close callback races for OPEN, LAYOUTGET...")
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2 years agoNFS: Trunking detection should handle ERESTARTSYS/EINTR
Trond Myklebust [Wed, 21 Jun 2017 14:16:56 +0000 (10:16 -0400)]
NFS: Trunking detection should handle ERESTARTSYS/EINTR

Currently, it will return EIO in those cases.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2 years agoMIPS: math-emu: Handle zero accumulator case in MADDF and MSUBF separately
Aleksandar Markovic [Mon, 19 Jun 2017 15:50:12 +0000 (17:50 +0200)]
MIPS: math-emu: Handle zero accumulator case in MADDF and MSUBF separately

If accumulator value is zero, just return the value of previously
calculated product. This brings logic in MADDF/MSUBF implementation
closer to the logic in ADD/SUB case.

Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com>
Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Cc: James.Hogan@imgtec.com
Cc: Paul.Burton@imgtec.com
Cc: Raghu.Gandham@imgtec.com
Cc: Leonid.Yegoshin@imgtec.com
Cc: Douglas.Leung@imgtec.com
Cc: Petar.Jovanovic@imgtec.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16512/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2 years agonvme/pci: Fix stuck nvme reset
Keith Busch [Tue, 27 Jun 2017 23:44:05 +0000 (17:44 -0600)]
nvme/pci: Fix stuck nvme reset

The controller state is set to resetting prior to disabling the
controller, so this patch accounts for that state when deciding if it
needs to freeze the queues. Without this, an 'nvme reset /dev/nvme0'
blocks forever because the queues were never frozen.

Fixes: 82b057caefaf ("nvme-pci: fix multiple ctrl removal scheduling")
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoMIPS: head: Reorder instructions missing a delay slot
Karl Beldan [Tue, 27 Jun 2017 19:22:16 +0000 (19:22 +0000)]
MIPS: head: Reorder instructions missing a delay slot

In this sequence the 'move' is assumed in the delay slot of the 'beq',
but head.S is in reorder mode and the former gets pushed one 'nop'
farther by the assembler.

The corrected behavior made booting with an UHI supplied dtb erratic.

Fixes: 15f37e158892 ("MIPS: store the appended dtb address in a variable")
Signed-off-by: Karl Beldan <karl.beldan+oss@gmail.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/16614/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2 years agonet: usb: asix88179_178a: Add support for the Belkin B2B128
Andrew F. Davis [Mon, 26 Jun 2017 17:41:20 +0000 (12:41 -0500)]
net: usb: asix88179_178a: Add support for the Belkin B2B128

The Belkin B2B128 is a USB 3.0 Hub + Gigabit Ethernet Adapter, the
Ethernet adapter uses the ASIX AX88179 USB 3.0 to Gigabit Ethernet
chip supported by this driver, add the USB ID for the same.

This patch is based on work by Geoffrey Tran <geoffrey.tran@gmail.com>
who has indicated they would like this upstreamed by someone more
familiar with the upstreaming process.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agofsl/fman: add dependency on HAS_DMA
Madalin Bucur [Mon, 26 Jun 2017 15:47:00 +0000 (18:47 +0300)]
fsl/fman: add dependency on HAS_DMA

A previous commit (5567e989198b5a8d) inserted a dependency on DMA
API that requires HAS_DMA to be added in Kconfig.

Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodm thin: do not queue freed thin mapping for next stage processing
Vallish Vaidyeshwara [Fri, 23 Jun 2017 18:53:06 +0000 (18:53 +0000)]
dm thin: do not queue freed thin mapping for next stage processing

process_prepared_discard_passdown_pt1() should cleanup
dm_thin_new_mapping in cases of error.

dm_pool_inc_data_range() can fail trying to get a block reference:

metadata operation 'dm_pool_inc_data_range' failed: error = -61

When dm_pool_inc_data_range() fails, dm thin aborts current metadata
transaction and marks pool as PM_READ_ONLY. Memory for thin mapping
is released as well. However, current thin mapping will be queued
onto next stage as part of queue_passdown_pt2() or passdown_endio().
This dangling thin mapping memory when processed and accessed in
next stage will lead to device mapper crashing.

Code flow without fix:
-> process_prepared_discard_passdown_pt1(m)
   -> dm_thin_remove_range()
   -> discard passdown
      --> passdown_endio(m) queues m onto next stage
   -> dm_pool_inc_data_range() fails, frees memory m
            but does not remove it from next stage queue

-> process_prepared_discard_passdown_pt2(m)
   -> processes freed memory m and crashes

One such stack:

Call Trace:
[<ffffffffa037a46f>] dm_cell_release_no_holder+0x2f/0x70 [dm_bio_prison]
[<ffffffffa039b6dc>] cell_defer_no_holder+0x3c/0x80 [dm_thin_pool]
[<ffffffffa039b88b>] process_prepared_discard_passdown_pt2+0x4b/0x90 [dm_thin_pool]
[<ffffffffa0399611>] process_prepared+0x81/0xa0 [dm_thin_pool]
[<ffffffffa039e735>] do_worker+0xc5/0x820 [dm_thin_pool]
[<ffffffff8152bf54>] ? __schedule+0x244/0x680
[<ffffffff81087e72>] ? pwq_activate_delayed_work+0x42/0xb0
[<ffffffff81089f53>] process_one_work+0x153/0x3f0
[<ffffffff8108a71b>] worker_thread+0x12b/0x4b0
[<ffffffff8108a5f0>] ? rescuer_thread+0x350/0x350
[<ffffffff8108fd6a>] kthread+0xca/0xe0
[<ffffffff8108fca0>] ? kthread_park+0x60/0x60
[<ffffffff81530b45>] ret_from_fork+0x25/0x30

The fix is to first take the block ref count for discarded block and
then do a passdown discard of this block. If block ref count fails,
then bail out aborting current metadata transaction, mark pool as
PM_READ_ONLY and also free current thin mapping memory (existing error
handling code) without queueing this thin mapping onto next stage of
processing. If block ref count succeeds, then passdown discard of this
block. Discard callback of passdown_endio() will queue this thin mapping
onto next stage of processing.

Code flow with fix:
-> process_prepared_discard_passdown_pt1(m)
   -> dm_thin_remove_range()
   -> dm_pool_inc_data_range()
      --> if fails, free memory m and bail out
   -> discard passdown
      --> passdown_endio(m) queues m onto next stage

Cc: stable <stable@vger.kernel.org> # v4.9+
Reviewed-by: Eduardo Valentin <eduval@amazon.com>
Reviewed-by: Cristian Gafton <gafton@amazon.com>
Reviewed-by: Anchal Agarwal <anchalag@amazon.com>
Signed-off-by: Vallish Vaidyeshwara <vallish@amazon.com>
Reviewed-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2 years agonet: prevent sign extension in dev_get_stats()
Eric Dumazet [Tue, 27 Jun 2017 14:02:20 +0000 (07:02 -0700)]
net: prevent sign extension in dev_get_stats()

Similar to the fix provided by Dominik Heidler in commit
9b3dc0a17d73 ("l2tp: cast l2tp traffic counter to unsigned")
we need to take care of 32bit kernels in dev_get_stats().

When using atomic_long_read(), we add a 'long' to u64 and
might misinterpret high order bit, unless we cast to unsigned.

Fixes: caf586e5f23ce ("net: add a core netdev->rx_dropped counter")
Fixes: 015f0688f57ca ("net: net: add a core netdev->tx_dropped counter")
Fixes: 6e7333d315a76 ("net: add rx_nohandler stat counter")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Tue, 27 Jun 2017 15:56:52 +0000 (08:56 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Three more fixes:

   - Fix the previous fix merged in the last pull for the Thumb2
     decompressor.

   - A fix from Vladimir to correctly identify the V7M cache type.

   - The optimised 3G vmsplit case does not work with LPAE, so don't
     allow this to be selected for LPAE configurations"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8682/1: V7M: Set cacheid iff DminLine or IminLine is nonzero
  ARM: 8681/1: make VMSPLIT_3G_OPT depends on !ARM_LPAE
  ARM: 8680/1: boot/compressed: fix inappropriate Thumb2 mnemonic for __nop

2 years agoMerge tag 'perf-urgent-for-mingo-4.12-20170626' of git://git.kernel.org/pub/scm/linux...
Ingo Molnar [Tue, 27 Jun 2017 07:17:02 +0000 (09:17 +0200)]
Merge tag 'perf-urgent-for-mingo-4.12-20170626' of git://git./linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fix from Arnaldo Carvalho de Melo:

 - Fix segfault for kernel.kptr_restrict=2 (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agoMerge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming
Linus Torvalds [Mon, 26 Jun 2017 19:25:59 +0000 (12:25 -0700)]
Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

Pull c6x fixlet from Mark Salter:
 "Update maintainer email"

* tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
  MAINTAINERS: update email address for C6x maintainer

2 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Mon, 26 Jun 2017 18:58:21 +0000 (11:58 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 bugfix from Martin Schwidefsky:
 "One last s390 patch for 4.12

  Revert the re-IPL semantics back to the v4.7 state. It turned out that
  the memory layout may change due to memory hotplug if load-normal is
  used"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/ipl: revert Load Normal semantics for LPAR CCW-type re-IPL

2 years agoperf machine: Fix segfault for kernel.kptr_restrict=2
Jiri Olsa [Mon, 26 Jun 2017 09:51:53 +0000 (11:51 +0200)]
perf machine: Fix segfault for kernel.kptr_restrict=2

Michael reported the segfault when kernel.kptr_restrict=2 is set.

  $ perf record ls
  ...
  perf: Segmentation fault
  Obtained 16 stack frames.
  ./perf(dump_stack+0x2d) [0x5068df]
  ./perf(sighandler_dump_stack+0x2d) [0x5069bf]
  ./perf() [0x43e47b]
  /lib64/libc.so.6(+0x3594f) [0x7f762004794f]
  /lib64/libc.so.6(strlen+0x26) [0x7f762009ef86]
  /lib64/libc.so.6(__strdup+0xd) [0x7f762009ecbd]
  ./perf(maps__set_kallsyms_ref_reloc_sym+0x4d) [0x51590f]
  ./perf(machine__create_kernel_maps+0x136) [0x50a7de]
  ./perf(perf_session__create_kernel_maps+0x2c) [0x510a81]
  ./perf(perf_session__new+0x13d) [0x510e23]
  ./perf() [0x43fd61]
  ./perf(cmd_record+0x704) [0x441823]
  ./perf() [0x4bc1a0]
  ./perf() [0x4bc40d]
  ./perf() [0x4bc55f]
  ./perf(main+0x2d5) [0x4bc939]
  Segmentation fault (core dumped)

The reason is that with kernel.kptr_restrict=2, we don't get
the symbol from machine__get_running_kernel_start, which we
want to use in maps__set_kallsyms_ref_reloc_sym and we crash.

Check the symbol name value before calling
maps__set_kallsyms_ref_reloc_sym() and succeed without ref_reloc_sym
being set. It's safe because we check its existence before we use it.

Reported-by: Michael Petlan <mpetlan@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170626095153.553-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agopowerpc/32: Avoid miscompilation w/GCC 4.6.3 - don't inline copy_to/from_user()
Michael Ellerman [Mon, 26 Jun 2017 01:30:57 +0000 (11:30 +1000)]
powerpc/32: Avoid miscompilation w/GCC 4.6.3 - don't inline copy_to/from_user()

Larry Finger reported that his Powerbook G4 was no longer booting with v4.12-rc,
userspace was up but giving weird errors such as:

  udevd[64]: starting version 175
  udevd[64]: Unable to receive ctrl message: Bad address.
  modprobe: chdir(4.12-rc1): No such file or directory

He bisected the problem to commit 3448890c32c3 ("powerpc: get rid of zeroing,
switch to RAW_COPY_USER").

Al identified that the problem is actually a miscompilation by GCC 4.6.3, which
is exposed by the above commit.

Al also pointed out that inlining copy_to/from_user() is probably of little or
no benefit, which is correct. Using Anton's copy_to_user benchmark, with a
pathological single byte copy, we see a small increase in performance
by *removing* inlining:

  Before (inlined):
  # time ./copy_to_user -w -l 1 -i 10000000 ( x 3 )
  real 0m22.063s
  real 0m22.059s
  real 0m22.076s

  After:
  # time ./copy_to_user -w -l 1 -i 10000000 ( x 3 )
  real 0m21.325s
  real 0m21.299s
  real 0m21.364s

So as a small performance improvement and to avoid the miscompilation, drop
inlining copy_to/from_user() on 32-bit.

Fixes: 3448890c32c3 ("powerpc: get rid of zeroing, switch to RAW_COPY_USER")
Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2 years agodrm/vmwgfx: Free hash table allocated by cmdbuf managed res mgr
Deepak Rawat [Mon, 26 Jun 2017 12:39:08 +0000 (14:39 +0200)]
drm/vmwgfx: Free hash table allocated by cmdbuf managed res mgr

The hash table created during vmw_cmdbuf_res_man_create was
never freed. This causes memory leak in context creation.
Added the corresponding drm_ht_remove in vmw_cmdbuf_res_man_destroy.

Tested for memory leak by running piglit overnight and kernel
memory is not inflated which earlier was.

Cc: <stable@vger.kernel.org>
Signed-off-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
2 years agox86/mm/hotplug: Fix BUG_ON() after hot-remove by not freeing PUD
Jérôme Glisse [Sat, 24 Jun 2017 18:05:14 +0000 (14:05 -0400)]
x86/mm/hotplug: Fix BUG_ON() after hot-remove by not freeing PUD

Since commit:

  af2cf278ef4f ("x86/mm/hotplug: Don't remove PGD entries in remove_pagetable()")

we no longer free PUDs so that we do not have to synchronize
all PGDs on hot-remove/vfree().

But the new 5-level page table patchset reverted that for 4-level
page tables, in the following commit:

  f2a6a7050109: ("x86: Convert the rest of the code to support p4d_t")

This patch restores the damage and disables free_pud() if we are in the
4-level page table case, thus avoiding BUG_ON() after hot-remove.

Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
[ Clarified the changelog and the code comments. ]
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20170624180514.3821-1-jglisse@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agodrm/i915: Disable EXEC_OBJECT_ASYNC when doing relocations
Chris Wilson [Fri, 16 Jun 2017 14:05:18 +0000 (15:05 +0100)]
drm/i915: Disable EXEC_OBJECT_ASYNC when doing relocations

If we write a relocation into the buffer, we require our own implicit
synchronisation added after the start of the execbuf, outside of the
user's control. As we may end up clflushing, or doing the patch itself
on the GPU, asynchronously we need to look at the implicit serialisation
on obj->resv and hence need to disable EXEC_OBJECT_ASYNC for this
object.

If the user does trigger a stall for relocations, we make sure the stall
is complete enough so that the batch is not submitted before we complete
those relocations.

Fixes: 77ae9957897d ("drm/i915: Enable userspace to opt-out of implicit fencing")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit 071750e550af46b5d3a84ad56c2a108c3e136284)
[danvet: Resolve conflicts, resolution reviewed by Tvrtko on irc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2 years agodrm/i915: Hold struct_mutex for per-file stats in debugfs/i915_gem_object
Chris Wilson [Sat, 17 Jun 2017 11:57:44 +0000 (12:57 +0100)]
drm/i915: Hold struct_mutex for per-file stats in debugfs/i915_gem_object

As we walk the obj->vma_list in per_file_stats(), we need to hold
struct_mutex to prevent alteration of that list.

Fixes: 1d2ac403ae3b ("drm: Protect dev->filelist with its own mutex")
Fixes: c84455b4bacc ("drm/i915: Move debug only per-request pid tracking from request to ctx")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101460
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170617115744.4452-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
(cherry picked from commit 0caf81b5c53d9bd332a95dbcb44db8de0b397a7c)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2 years agodrm/i915: Retire the VMA's fence tracker before unbinding
Chris Wilson [Tue, 20 Jun 2017 12:43:19 +0000 (13:43 +0100)]
drm/i915: Retire the VMA's fence tracker before unbinding

Since we may track unfenced access (GPU access to the vma that
explicitly requires no fence), vma->last_fence may be set without any
attached fence (vma->fence) and so will not be flushed when we call
i915_vma_put_fence(). Since we stopped doing a full retire of the
activity trackers for unbind, we need to explicitly retire each tracker.

Fixes: b0decaf75bd9 ("drm/i915: Track active vma requests")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170620124321.1108-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
(cherry picked from commit 760a898d8069111704e1bd43f00ebf369ae46e57)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2 years agoLinux 4.12-rc7 v4.12-rc7
Linus Torvalds [Mon, 26 Jun 2017 01:30:05 +0000 (18:30 -0700)]
Linux 4.12-rc7

2 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Jun 2017 19:01:56 +0000 (12:01 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fix from Thomas Gleixner:
 "A single fix to unbreak the vdso32 build for 64bit kernels caused by
  excess #includes in the mshyperv header"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mshyperv: Remove excess #includes from mshyperv.h

2 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Jun 2017 18:59:19 +0000 (11:59 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fixes from Thomas Gleixner:
 "A few fixes for timekeeping and timers:

   - Plug a subtle race due to a missing READ_ONCE() in the timekeeping
     code where reloading of a pointer results in an inconsistent
     callback argument being supplied to the clocksource->read function.

   - Correct the CLOCK_MONOTONIC_RAW sub-nanosecond accounting in the
     time keeping core code, to prevent a possible discontuity.

   - Apply a similar fix to the arm64 vdso clock_gettime()
     implementation

   - Add missing includes to clocksource drivers, which relied on
     indirect includes which fails in certain configs.

   - Use the proper iomem pointer for read/iounmap in a probe function"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  arm64/vdso: Fix nsec handling for CLOCK_MONOTONIC_RAW
  time: Fix CLOCK_MONOTONIC_RAW sub-nanosecond accounting
  time: Fix clock->read(clock) race around clocksource changes
  clocksource: Explicitly include linux/clocksource.h when needed
  clocksource/drivers/arm_arch_timer: Fix read and iounmap of incorrect variable

2 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Jun 2017 18:55:21 +0000 (11:55 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "Three fixlets for perf:

   - Return the proper error code if aux buffers for a event are not
     supported.

   - Calculate the probe offset for inlined functions correctly

   - Update the Skylake DTLB load/store miss event so it can count 1G
     TLB entries as well"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf probe: Fix probe definition for inlined functions
  perf/x86/intel: Add 1G DTLB load/store miss support for SKL
  perf/aux: Correct return code of rb_alloc_aux() if !has_aux(ev)

2 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Jun 2017 18:53:36 +0000 (11:53 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fix from Thomas Gleixner:
 "A single fix for the MIPS GIC to prevent ftrace recursion"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mips-gic: Mark count and compare accessors notrace

2 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sun, 25 Jun 2017 17:39:43 +0000 (10:39 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:

 - a quirk to i8042 to ignore timeout bit on Lifebook AH544

 - a fixup to Synaptics RMI function 54 that was breaking some Dells

 - a fix for memory leak in soc_button_array driver

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: synaptics-rmi4 - only read the F54 query registers which are used
  Input: i8042 - add Fujitsu Lifebook AH544 to notimeout list
  Input: soc_button_array - fix leaking the ACPI button descriptor buffer

2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Linus Torvalds [Sun, 25 Jun 2017 17:36:44 +0000 (10:36 -0700)]
Merge git://git./linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "Here are the target-pending fixes for v4.12-rc7 that have been queued
  up for the last 2 weeks. This includes:

   - Fix a TMR related kref underflow detected by the recent refcount_t
     conversion in upstream.

   - Fix a iscsi-target corner case during explicit connection logout
     timeout failure.

   - Address last fallout in iscsi-target immediate data handling from
     v4.4 target-core now allowing control CDB payload underflow"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iscsi-target: Reject immediate data underflow larger than SCSI transfer length
  iscsi-target: Fix delayed logout processing greater than SECONDS_FOR_LOGOUT_COMP
  target: Fix kref->refcount underflow in transport_cmd_finish_abort

2 years agotcp: reset sk_rx_dst in tcp_disconnect()
WANG Cong [Sun, 25 Jun 2017 06:50:30 +0000 (23:50 -0700)]
tcp: reset sk_rx_dst in tcp_disconnect()

We have to reset the sk->sk_rx_dst when we disconnect a TCP
connection, because otherwise when we re-connect it this
dst reference is simply overridden in tcp_finish_connect().

This fixes a dst leak which leads to a loopback dev refcnt
leak. It is a long-standing bug, Kevin reported a very similar
(if not same) bug before. Thanks to Andrei for providing such
a reliable reproducer which greatly narrows down the problem.

Fixes: 41063e9dd119 ("ipv4: Early TCP socket demux.")
Reported-by: Andrei Vagin <avagin@gmail.com>
Reported-by: Kevin Xu <kaiwen.xu@hulu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipv6: reset daddr and dport in sk if connect() fails
Wei Wang [Fri, 23 Jun 2017 22:25:37 +0000 (15:25 -0700)]
net: ipv6: reset daddr and dport in sk if connect() fails

In __ip6_datagram_connect(), reset sk->sk_v6_daddr and inet->dport if
error occurs.
In udp_v6_early_demux(), check for sk_state to make sure it is in
TCP_ESTABLISHED state.
Together, it makes sure unconnected UDP socket won't be considered as a
valid candidate for early demux.

v3: add TCP_ESTABLISHED state check in udp_v6_early_demux()
v2: fix compilation error

Fixes: 5425077d73e0 ("net: ipv6: Add early demux handler for UDP unicast")
Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobnx2x: Don't log mc removal needlessly
Mintz, Yuval [Sat, 24 Jun 2017 12:37:00 +0000 (15:37 +0300)]
bnx2x: Don't log mc removal needlessly

When mc configuration changes bnx2x_config_mcast() can return 0 for
success, negative for failure and positive for benign reason preventing
its immediate work, e.g., when the command awaits the completion of
a previously sent command.

When removing all configured macs on a 578xx adapter, if a positive
value would be returned driver would errneously log it as an error.

Fixes: c7b7b483ccc9 ("bnx2x: Don't flush multicast MACs")
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge tag 'kbuild-fixes-v4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 24 Jun 2017 23:18:00 +0000 (16:18 -0700)]
Merge tag 'kbuild-fixes-v4.12-2' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:
 "Nothing scary, just some random fixes:

   - fix warnings of host programs

   - fix "make tags" when COMPILED_SOURCE=1 is specified along with O=

   - clarify help message of C=1 option

   - fix dependency for ncurses compatibility check

   - fix "make headers_install" for fakechroot environment"

* tag 'kbuild-fixes-v4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kconfig: fix sparse warnings in nconfig
  kbuild: fix header installation under fakechroot environment
  kconfig: Check for libncurses before menuconfig
  Kbuild: tiny correction on `make help`
  tags: honor COMPILED_SOURCE with apart output directory
  genksyms: add printf format attribute to error_with_pos()

2 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...
Linus Torvalds [Sat, 24 Jun 2017 09:24:53 +0000 (02:24 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ebiederm/user-namespace

Pull timer fix from Eric Biederman:
 "This fixes an issue of confusing injected signals with the signals
  from posix timers that has existed since posix timers have been in the
  kernel.

  This patch is slightly simpler than my earlier version of this patch
  as I discovered in testing that I had misspelled "#ifdef
  CONFIG_POSIX_TIMERS". So I deleted that unnecessary test and made
  setting of resched_timer uncondtional.

  I have tested this and verified that without this patch there is a
  nasty hang that is easy to trigger, and with this patch everything
  works properly"

Thomas Gleixner dixit:
 "It fixes the problem at hand and covers the ptrace case as well, which
  I missed.

Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de>"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  signal: Only reschedule timers on signals timers have sent

2 years agox86/mshyperv: Remove excess #includes from mshyperv.h
Thomas Gleixner [Fri, 23 Jun 2017 08:50:38 +0000 (10:50 +0200)]
x86/mshyperv: Remove excess #includes from mshyperv.h

A recent commit included linux/slab.h in linux/irq.h. This breaks the build
of vdso32 on a 64-bit kernel.

The reason is that linux/irq.h gets included into the vdso code via
linux/interrupt.h which is included from asm/mshyperv.h. That makes the
32-bit vdso compile fail, because slab.h includes the pgtable headers for
64-bit on a 64-bit build.

Neither linux/clocksource.h nor linux/interrupt.h are needed in the
mshyperv.h header file itself - it has a dependency on <linux/atomic.h>.

Remove the includes and unbreak the build.

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: devel@linuxdriverproject.org
Fixes: dee863b571b0 ("hv: export current Hyper-V clocksource")
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1706231038460.2647@nanos
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agoMerge tag 'powerpc-4.12-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sat, 24 Jun 2017 00:53:16 +0000 (17:53 -0700)]
Merge tag 'powerpc-4.12-7' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Some more powerpc fixes for 4.12. Most of these actually came in last
  week but got held up for some more testing.

   - three fixes for kprobes/ftrace/livepatch interactions.

   - properly handle data breakpoints when using the Radix MMU.

   - fix for perf sampling of registers during call_usermodehelper().

   - properly initialise the thread_info on our emergency stacks

   - add an explicit flush when doing TLB invalidations for a process
     using NPU2.

  Thanks to: Alistair Popple, Naveen N. Rao, Nicholas Piggin, Ravi
  Bangoria, Masami Hiramatsu"

* tag 'powerpc-4.12-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64: Initialise thread_info for emergency stacks
  powerpc/powernv/npu-dma: Add explicit flush when sending an ATSD
  powerpc/perf: Fix oops when kthread execs user process
  powerpc/64s: Handle data breakpoints in Radix mode
  powerpc/kprobes: Skip livepatch_handler() for jprobes
  powerpc/ftrace: Pass the correct stack pointer for DYNAMIC_FTRACE_WITH_REGS
  powerpc/kprobes: Pause function_graph tracing during jprobes handling

2 years agoMerge tag 'acpi-4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Sat, 24 Jun 2017 00:49:12 +0000 (17:49 -0700)]
Merge tag 'acpi-4.12-rc7' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "This fixes the ACPI-based enumeration of some I2C and SPI devices
  broken in 4.11.

  Specifics:

   - I2C and SPI devices are expected to be enumerated by the I2C and
     SPI subsystems, respectively, but due to a change made during the
     4.11 cycle, in some cases the ACPI core marks them as already
     enumerated which causes the I2C and SPI subsystems to overlook
     them, so fix that (Jarkko Nikula)"

* tag 'acpi-4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / scan: Fix enumeration for special SPI and I2C devices

2 years agoMerge branch 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 24 Jun 2017 00:46:10 +0000 (17:46 -0700)]
Merge branch 'i2c/for-current-fixed' of git://git./linux/kernel/git/wsa/linux

Pull i2c fix from Wolfram Sang.

* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: imx: Use correct function to write to register

2 years agoMerge tag 'gpio-v4.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Sat, 24 Jun 2017 00:40:41 +0000 (17:40 -0700)]
Merge tag 'gpio-v4.12-3' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fix from Linus Walleij:
 "A single GPIO patch fixing the compatible string for the MVEBU PWM
  controller embedded in the GPIO controller before we release v4.12.
  Hopefully"

* tag 'gpio-v4.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: mvebu: change compatible string for PWM support

2 years agoMerge tag 'sound-4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Sat, 24 Jun 2017 00:37:56 +0000 (17:37 -0700)]
Merge tag 'sound-4.12-rc7' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Nothing exciting here, just a few stable fixes:

   - suppress spurious kernel WARNING in PCM core

   - fix potential spin deadlock at error handling in firewire

   - HD-audio PCI ID addition / fixup"

* tag 'sound-4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Apply quirks to Broxton-T, too
  ALSA: firewire-lib: Fix stall of process context at packet error
  ALSA: pcm: Don't treat NULL chmap as a fatal error
  ALSA: hda - Add Coffelake PCI ID

2 years agoMerge tag 'drm-fixes-for-v4.12-rc7' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 24 Jun 2017 00:35:57 +0000 (17:35 -0700)]
Merge tag 'drm-fixes-for-v4.12-rc7' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "A varied bunch of fixes, one for an API regression with connectors.

  Otherwise amdgpu and i915 have a bunch of varied fixes, the shrinker
  ones being the most important"

* tag 'drm-fixes-for-v4.12-rc7' of git://people.freedesktop.org/~airlied/linux:
  drm: Fix GETCONNECTOR regression
  drm/radeon: add a quirk for Toshiba Satellite L20-183
  drm/radeon: add a PX quirk for another K53TK variant
  drm/amdgpu: adjust default display clock
  drm/amdgpu/atom: fix ps allocation size for EnableDispPowerGating
  drm/amdgpu: add Polaris12 DID
  drm/i915: Don't enable backlight at setup time.
  drm/i915: Plumb the correct acquire ctx into intel_crtc_disable_noatomic()
  drm/i915: Fix deadlock witha the pipe A quirk during resume
  drm/i915: Remove __GFP_NORETRY from our buffer allocator
  drm/i915: Encourage our shrinker more when our shmemfs allocations fails
  drm/i915: Differentiate between sw write location into ring and last hw read