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Groups > linux.kernel > #1425556
| From | Sasha Levin <sasha.levin@oracle.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: kernel, mm: NULL deref in copy_process while OOMing |
| Date | 2016-06-18 02:00 +0200 |
| Message-ID | <rLbQ5-4LZ-3@gated-at.bofh.it> (permalink) |
| References | <rKmkx-52w-11@gated-at.bofh.it> <rKC5Y-6GJ-33@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 06/16/2016 05:39 AM, Michal Hocko wrote: > On Wed 15-06-16 12:50:43, Sasha Levin wrote: >> Hi all, >> >> I'm seeing the following NULL ptr deref in copy_process right after a bunch >> of OOM killing activity on -next kernels: >> >> Out of memory (oom_kill_allocating_task): Kill process 3477 (trinity-c159) score 0 or sacrifice child >> Killed process 3477 (trinity-c159) total-vm:3226820kB, anon-rss:36832kB, file-rss:1640kB, shmem-rss:444kB >> oom_reaper: reaped process 3477 (trinity-c159), now anon-rss:0kB, file-rss:0kB, shmem-rss:444kB >> Out of memory (oom_kill_allocating_task): Kill process 3450 (trinity-c156) score 0 or sacrifice child >> Killed process 3450 (trinity-c156) total-vm:3769768kB, anon-rss:36832kB, file-rss:1652kB, shmem-rss:508kB >> oom_reaper: reaped process 3450 (trinity-c156), now anon-rss:0kB, file-rss:0kB, shmem-rss:572kB >> BUG: unable to handle kernel NULL pointer dereference at 0000000000000150 >> IP: copy_process (./arch/x86/include/asm/atomic.h:103 kernel/fork.c:484 kernel/fork.c:964 kernel/fork.c:1018 kernel/fork.c:1484) >> PGD 1ff944067 PUD 1ff929067 PMD 0 >> Oops: 0002 [#1] PREEMPT SMP KASAN >> Modules linked in: >> CPU: 18 PID: 8761 Comm: trinity-main Not tainted 4.7.0-rc3-sasha-02101-g1e1b9fa #3108 > > Is this a common parent of the oom killed children? Yup, it's trying to spawn new ones while existing children are getting killed. Thanks, Sasha
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kernel, mm: NULL deref in copy_process while OOMing Sasha Levin <sasha.levin@oracle.com> - 2016-06-15 19:00 +0200
Re: kernel, mm: NULL deref in copy_process while OOMing Michal Hocko <mhocko@kernel.org> - 2016-06-16 11:50 +0200
Re: kernel, mm: NULL deref in copy_process while OOMing Sasha Levin <sasha.levin@oracle.com> - 2016-06-18 02:00 +0200
Re: kernel, mm: NULL deref in copy_process while OOMing Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-06-19 05:10 +0200
Re: kernel, mm: NULL deref in copy_process while OOMing Michal Hocko <mhocko@kernel.org> - 2016-06-20 09:30 +0200
Re: kernel, mm: NULL deref in copy_process while OOMing Michal Hocko <mhocko@kernel.org> - 2016-06-20 13:20 +0200
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