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Groups > linux.kernel > #1452525
| From | Vegard Nossum <vegard.nossum@oracle.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: kernel BUG at mm/mempolicy.c:1699! |
| Date | 2016-07-29 21:20 +0200 |
| Message-ID | <s0lua-qL-9@gated-at.bofh.it> (permalink) |
| References | <s0keK-7S4-25@gated-at.bofh.it> <s0koq-8aN-25@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 07/29/2016 08:05 PM, Dmitry Vyukov wrote: > On Fri, Jul 29, 2016 at 7:57 PM, Vegard Nossum <vegard.nossum@oracle.com> wrote: >> ------------[ cut here ]------------ >> kernel BUG at mm/mempolicy.c:1699! [...] >> In particular, it's interesting that the kernel/exit.c line is >> >> mpol_put(tsk->mempolicy); >> >> and alloc_pages_current() does (potentially): >> >> pol = get_task_policy(current);. >> >> The bug seems very new or very rare or both. > > This is https://github.com/google/kasan/issues/35 > It is introduced with stackdepot. Ah, cool. Would it be enough to set __GFP_THISNODE in depot_save_stack() so it uses &default_policy instead of current->mempolicy? Vegard
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kernel BUG at mm/mempolicy.c:1699! Vegard Nossum <vegard.nossum@oracle.com> - 2016-07-29 20:00 +0200
Re: kernel BUG at mm/mempolicy.c:1699! Dmitry Vyukov <dvyukov@google.com> - 2016-07-29 20:10 +0200
Re: kernel BUG at mm/mempolicy.c:1699! Vegard Nossum <vegard.nossum@oracle.com> - 2016-07-29 21:20 +0200
Re: kernel BUG at mm/mempolicy.c:1699! Dmitry Vyukov <dvyukov@google.com> - 2016-07-29 21:20 +0200
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