The patch titled
Subject: oom_reaper-close-race-with-exiting-task-fix
has been added to the -mm tree. Its filename is
oom_reaper-close-race-with-exiting-task-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/oom_reaper-close-race-with-exiting-task-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/oom_reaper-close-race-with-exiting-task-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: oom_reaper-close-race-with-exiting-task-fix
fix use of unused `mm', Per Stephen
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/oom_kill.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff -puN mm/oom_kill.c~oom_reaper-close-race-with-exiting-task-fix mm/oom_kill.c
--- a/mm/oom_kill.c~oom_reaper-close-race-with-exiting-task-fix
+++ a/mm/oom_kill.c
@@ -443,7 +443,7 @@ static bool __oom_reap_task(struct task_
{
struct mmu_gather tlb;
struct vm_area_struct *vma;
- struct mm_struct *mm;
+ struct mm_struct *mm = NULL;
struct task_struct *p;
struct zap_details details = {.check_swap_entries = true,
.ignore_dirty = true};
@@ -534,7 +534,8 @@ unlock_oom:
* different context because we shouldn't risk we get stuck there and
* put the oom_reaper out of the way.
*/
- mmput_async(mm);
+ if (mm)
+ mmput_async(mm);
return ret;
}
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
oom_reaper-close-race-with-exiting-task-fix.patch
oom_reaper-close-race-with-exiting-task-checkpatch-fixes.patch
mm-cma-silence-warnings-due-to-max-usage-checkpatch-fixes.patch
arm-arch-arm-include-asm-pageh-needs-personalityh.patch
mm.patch
mm-check-the-return-value-of-lookup_page_ext-for-all-call-sites-fix.patch
mm-check-the-return-value-of-lookup_page_ext-for-all-call-sites-checkpatch-fixes.patch
mm-thp-avoid-unnecessary-swapin-in-khugepaged-fix.patch
drivers-net-wireless-intel-iwlwifi-dvm-calibc-fix-min-warning.patch
fs-nfs-nfs4statec-work-around-gcc-44-union-initialization-bug.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch
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