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Groups > linux.kernel > #1230460
| From | Andrey Konovalov <andreyknvl@google.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: Multiple potential races on vma->vm_flags |
| Date | 2015-09-22 18:50 +0200 |
| Message-ID | <qbyVs-2z7-15@gated-at.bofh.it> (permalink) |
| References | (5 earlier) <q7a5k-2Ey-17@gated-at.bofh.it> <q7u41-7zp-7@gated-at.bofh.it> <q7HNE-2kQ-7@gated-at.bofh.it> <q92n1-3er-3@gated-at.bofh.it> <q93M7-5yj-47@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
If anybody comes up with a patch to fix the original issue I easily can test it, since I'm hitting "BUG: Bad page state" in a second when fuzzing with KTSAN and Trinity. On Tue, Sep 15, 2015 at 9:01 PM, Kirill A. Shutemov <kirill@shutemov.name> wrote: > On Tue, Sep 15, 2015 at 01:36:45PM -0400, Sasha Levin wrote: >> On 09/11/2015 09:27 PM, Hugh Dickins wrote: >> > I'm inclined to echo Vlastimil's comment from earlier in the thread: >> > sounds like an overkill, unless we find something more serious than this. >> >> I've modified my tests to stress the exit path of processes with many vmas, > > Could you share the test? > >> and hit the following NULL ptr deref (not sure if it's related to the original issue): >> >> [1181047.935563] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN >> [1181047.937223] Modules linked in: >> [1181047.937772] CPU: 4 PID: 21912 Comm: trinity-c341 Not tainted 4.3.0-rc1-next-20150914-sasha-00043-geddd763-dirty #2554 >> [1181047.939387] task: ffff8804195c8000 ti: ffff880433f00000 task.ti: ffff880433f00000 >> [1181047.940533] RIP: unmap_vmas (mm/memory.c:1337) > > Is it "struct mm_struct *mm = vma->vm_mm;"? > > -- > Kirill A. Shutemov -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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Multiple potential races on vma->vm_flags "Kirill A. Shutemov" <kirill@shutemov.name> - 2015-09-07 13:50 +0200
Re: Multiple potential races on vma->vm_flags Vlastimil Babka <vbabka@suse.cz> - 2015-09-09 17:30 +0200
Re: Multiple potential races on vma->vm_flags "Kirill A. Shutemov" <kirill@shutemov.name> - 2015-09-09 18:10 +0200
Re: Multiple potential races on vma->vm_flags Sasha Levin <sasha.levin@oracle.com> - 2015-09-10 03:00 +0200
Re: Multiple potential races on vma->vm_flags "Kirill A. Shutemov" <kirill@shutemov.name> - 2015-09-10 10:40 +0200
Re: Multiple potential races on vma->vm_flags Andrey Konovalov <andreyknvl@google.com> - 2015-09-10 15:30 +0200
Re: Multiple potential races on vma->vm_flags "Kirill A. Shutemov" <kirill@shutemov.name> - 2015-09-11 12:50 +0200
Re: Multiple potential races on vma->vm_flags Vlastimil Babka <vbabka@suse.cz> - 2015-09-11 17:30 +0200
Re: Multiple potential races on vma->vm_flags Vlastimil Babka <vbabka@suse.cz> - 2015-09-11 18:10 +0200
Re: Multiple potential races on vma->vm_flags Hugh Dickins <hughd@google.com> - 2015-09-12 03:30 +0200
Re: Multiple potential races on vma->vm_flags "Kirill A. Shutemov" <kirill@shutemov.name> - 2015-09-14 12:20 +0200
Re: Multiple potential races on vma->vm_flags Sasha Levin <sasha.levin@oracle.com> - 2015-09-15 19:40 +0200
Re: Multiple potential races on vma->vm_flags "Kirill A. Shutemov" <kirill@shutemov.name> - 2015-09-15 21:10 +0200
Re: Multiple potential races on vma->vm_flags Andrey Konovalov <andreyknvl@google.com> - 2015-09-22 18:50 +0200
Re: Multiple potential races on vma->vm_flags Hugh Dickins <hughd@google.com> - 2015-09-22 21:00 +0200
Re: Multiple potential races on vma->vm_flags Andrey Konovalov <andreyknvl@google.com> - 2015-09-22 21:50 +0200
Re: Multiple potential races on vma->vm_flags Hugh Dickins <hughd@google.com> - 2015-09-23 03:50 +0200
Re: Multiple potential races on vma->vm_flags "Kirill A. Shutemov" <kirill@shutemov.name> - 2015-09-23 13:50 +0200
Re: Multiple potential races on vma->vm_flags Davidlohr Bueso <dave@stgolabs.net> - 2015-09-24 01:00 +0200
Re: Multiple potential races on vma->vm_flags Andrey Konovalov <andreyknvl@google.com> - 2015-09-23 15:10 +0200
Re: Multiple potential races on vma->vm_flags Sasha Levin <sasha.levin@oracle.com> - 2015-09-24 02:50 +0200
Re: Multiple potential races on vma->vm_flags "Kirill A. Shutemov" <kirill@shutemov.name> - 2015-09-25 21:40 +0200
Re: Multiple potential races on vma->vm_flags Sasha Levin <sasha.levin@oracle.com> - 2015-09-23 23:40 +0200
Re: Multiple potential races on vma->vm_flags Oleg Nesterov <oleg@redhat.com> - 2015-09-25 16:30 +0200
Re: Multiple potential races on vma->vm_flags Oleg Nesterov <oleg@redhat.com> - 2015-09-24 15:20 +0200
Re: Multiple potential races on vma->vm_flags Sasha Levin <sasha.levin@oracle.com> - 2015-09-24 18:30 +0200
Re: Multiple potential races on vma->vm_flags Oleg Nesterov <oleg@redhat.com> - 2015-09-24 19:30 +0200
Re: Multiple potential races on vma->vm_flags Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-09-24 21:00 +0200
Re: Multiple potential races on vma->vm_flags Sasha Levin <sasha.levin@oracle.com> - 2015-09-24 21:10 +0200
Re: Multiple potential races on vma->vm_flags Oleg Nesterov <oleg@redhat.com> - 2015-09-25 14:50 +0200
Re: Multiple potential races on vma->vm_flags Oleg Nesterov <oleg@redhat.com> - 2015-09-23 17:40 +0200
Re: Multiple potential races on vma->vm_flags Oleg Nesterov <oleg@redhat.com> - 2015-09-23 17:50 +0200
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