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Subject: Re: WARNING in compat_copy_entries (2)
From:   Andy Lutomirski <luto@amacapital.net>
In-Reply-To: <00000000000019eb000586826c2a@google.com>
Date:   Sun, 14 Apr 2019 13:08:09 -0700
Cc:     alexl@redhat.com, bridge@lists.linux-foundation.org,
        coreteam@netfilter.org, cosimo@endlessm.com, davem@davemloft.net,
        dvyukov@google.com, fw@strlen.de, kadlec@blackhole.kfki.hu,
        libc-alpha@sourceware.org, linux-kernel@vger.kernel.org,
        luto@kernel.org, mingo@kernel.org, netdev@vger.kernel.org,
        netfilter-devel@vger.kernel.org, nicholson@endlessm.com,
        pablo@netfilter.org, peterz@infradead.org, raji@linux.vnet.ibm.com,
        stephen@networkplumber.org, syzkaller-bugs@googlegroups.com,
        tglx@linutronix.de, torvalds@linux-foundation.org,
        tuliom@linux.vnet.ibm.com
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To:     syzbot <syzbot+659574e7bcc7f7eb4df7@syzkaller.appspotmail.com>
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This is likely a confused bisection.  I bet that reverting this patch breaks=
 your test but has nothing to do with the bug. Try reproducing with socketca=
ll() to bisect farther.

--Andy

> On Apr 14, 2019, at 12:20 PM, syzbot <syzbot+659574e7bcc7f7eb4df7@syzkalle=
r.appspotmail.com> wrote:
>=20
> syzbot has bisected this bug to:
>=20
> commit 9dea5dc921b5f4045a18c63eb92e84dc274d17eb
> Author: Andy Lutomirski <luto@kernel.org>
> Date:   Tue Jul 14 22:24:24 2015 +0000
>=20
>    x86/entry/syscalls: Wire up 32-bit direct socket calls
>=20
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=3D1736919f200=
000
> start commit:   ce380619 Merge tag 'please-pull-ia64_misc' of git://git.ke=
..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=3D10b6919f200000=

> kernel config:  https://syzkaller.appspot.com/x/.config?x=3D36fbc8c97ef985=
d3
> dashboard link: https://syzkaller.appspot.com/bug?extid=3D659574e7bcc7f7eb=
4df7
> userspace arch: i386
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=3D179b4d8b8000=
00
>=20
> Reported-by: syzbot+659574e7bcc7f7eb4df7@syzkaller.appspotmail.com
> Fixes: 9dea5dc921b5 ("x86/entry/syscalls: Wire up 32-bit direct socket cal=
ls")
>=20
> For information about bisection process see: https://goo.gl/tpsmEJ#bisecti=
on