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Groups > linux.kernel > #1452525
| Path | csiph.com!news.mixmin.net!news.unit0.net!news.panservice.it!bofh.it!news.nic.it!robomod |
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| From | Vegard Nossum <vegard.nossum@oracle.com> |
| Newsgroups | linux.kernel |
| Subject | Re: kernel BUG at mm/mempolicy.c:1699! |
| Date | Fri, 29 Jul 2016 21:20:02 +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> |
| X-Original-To | Dmitry Vyukov <dvyukov@google.com> |
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| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
| X-Mailing-List | linux-kernel@vger.kernel.org |
| Approved | robomod@news.nic.it |
| Lines | 25 |
| Organization | linux.* mail to news gateway |
| X-Original-Cc | Andrey Ryabinin <aryabinin@virtuozzo.com>, Alexander Potapenko <glider@google.com>, kasan-dev <kasan-dev@googlegroups.com>, LKML <linux-kernel@vger.kernel.org>, Linux MM <linux-mm@kvack.org> |
| X-Original-Date | Fri, 29 Jul 2016 21:10:23 +0200 |
| X-Original-Message-ID | <579BAA1F.6000704@oracle.com> |
| X-Original-References | <579B991C.9050809@oracle.com> <CACT4Y+a9=LJjaXgkp=0Dm+ftDbYQchqrzm7P9cM6ksRdHCnw-w@mail.gmail.com> |
| X-Original-Sender | linux-kernel-owner@vger.kernel.org |
| Xref | csiph.com linux.kernel:1452525 |
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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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