[PATCH] bugfix oom kill init lead panic
From: chenjie6
Date: Sun Nov 29 2015 - 21:54:54 EST
From: chenjie <chenjie6@xxxxxxxxxx>
when oom happened we can see:
Out of memory: Kill process 9134 (init) score 3 or sacrifice child
Killed process 9134 (init) total-vm:1868kB, anon-rss:84kB, file-rss:572kB
Kill process 1 (init) sharing same memory
...
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
That's because:
the busybox init will vfork a process,oom_kill_process found
the init not the children,their mm is the same when vfork.
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Chen Jie <chenjie6@xxxxxxxxxx>
---
mm/oom_kill.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 4d87d7c..de77cbc 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -513,7 +513,7 @@ void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
rcu_read_lock();
for_each_process(p)
if (p->mm == mm && !same_thread_group(p, victim) &&
- !(p->flags & PF_KTHREAD)) {
+ !(p->flags & PF_KTHREAD) && !is_global_init(p)) {
if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
continue;
--
1.8.0
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