From: Andrew Morton <akpm@linux-foundation.org>
To: John Hubbard <jhubbard@nvidia.com>
Cc: syzbot <syzbot+681bbbb80445ead3c040@syzkaller.appspotmail.com>,
hughd@google.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, syzkaller-bugs@googlegroups.com,
Alistair Popple <apopple@nvidia.com>,
David Hildenbrand <david@redhat.com>,
Jason Gunthorpe <jgg@nvidia.com>
Subject: Re: [syzbot] general protection fault in vma_is_shmem
Date: Sun, 21 Aug 2022 16:31:20 -0700 [thread overview]
Message-ID: <20220821163120.df7d936c9f47b6dc875ab763@linux-foundation.org> (raw)
In-Reply-To: <0004c00e-e50f-5dcf-20f9-1b8da0822bfd@nvidia.com>
On Sun, 21 Aug 2022 16:18:48 -0700 John Hubbard <jhubbard@nvidia.com> wrote:
> > vmas[] array. We haven't messed with gup.c much this time around -
> > just one patch from Alistair ("mm/gup.c: simplify and fix
> > check_and_migrate_movable_pages() return codes"). It does touch this
> > area, but I can't immediately see how it could newly cause this.
> >
>
> Neither can I, even after looking at both of these recent commits to
> gup.c in this branch:
>
> commit 4d1225cd5560 ("mm/gup.c: simplify and fix
> check_and_migrate_movable_pages() return codes")
>
> commit 0e5d6dac6b65 ("mm/gup: fix FOLL_FORCE COW security issue and
> remove FOLL_COW")
>
> As you say, a bisection would really help here.
Might
https://lkml.kernel.org/r/20220821183547.950370-1-syoshida@redhat.com
save us?
next prev parent reply other threads:[~2022-08-21 23:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-21 6:14 syzbot
[not found] ` <20220821013246.a706fa7c2d8cb494efdba02e@linux-foundation.org>
2022-08-21 23:18 ` John Hubbard
2022-08-21 23:31 ` Andrew Morton [this message]
2022-08-22 0:10 ` John Hubbard
2022-08-31 9:40 ` Aleksandr Nogikh
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