alpha: unbreak OSF/1 (a.out) binaries

commit 2444e56b0c08e6f3e3877583841a1213e3263d98 upstream

OSF/1 brk(2) was broken by following one-liner in sys_brk()
(commit 4cc6028d4040f95cdb590a87db478b42b8be0508):

-	if (brk < mm->end_code)
+	if (brk < mm->start_brk)
		goto out;

The problem is that osf_set_program_attributes()
does update mm->end_code, but not mm->start_brk,
which still contains inappropriate value left from
binary loader, so brk() always fails.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 8c71daf94a59ce0f27537a4c8352ab362152dbbe..9fee37e2596f34fe8d3c22558b87d248396b4dca 100644 (file)
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -75,6 +75,7 @@ osf_set_program_attributes(unsigned long text_start, unsigned long text_len,
        lock_kernel();
        mm = current->mm;
        mm->end_code = bss_start + bss_len;
+       mm->start_brk = bss_start + bss_len;
        mm->brk = bss_start + bss_len;
 #if 0
        printk("set_program_attributes(%lx %lx %lx %lx)\n",