mm: replace hardcoded 3% with admin_reserve_pages knob

[karo-tx-linux.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 8d932b1c9056af738e2903bf813bcbd035ed3892..1766d324d5e35c38ca3910ea237857c0600d1a02 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1141,6 +1141,9 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        if ((clone_flags & (CLONE_NEWNS|CLONE_FS)) == (CLONE_NEWNS|CLONE_FS))
                return ERR_PTR(-EINVAL);
 
+       if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS))
+               return ERR_PTR(-EINVAL);
+
        /*
         * Thread groups must share signals as well, and detached threads
         * can only be started up within the thread group.
@@ -1807,7 +1810,7 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
         * If unsharing a user namespace must also unshare the thread.
         */
        if (unshare_flags & CLONE_NEWUSER)
-               unshare_flags |= CLONE_THREAD;
+               unshare_flags |= CLONE_THREAD | CLONE_FS;
        /*
         * If unsharing a pid namespace must also unshare the thread.
         */