linux-kernel - Re: general protection fault in selinux_socket

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Message-ID: <000000000000a1a76d05a668ccbb@google.com>
Date:   Sun, 24 May 2020 11:12:03 -0700
From:   syzbot <syzbot+c6bfc3db991edc918432@...kaller.appspotmail.com>
To:     andriin@...com, anton@...msg.org, ast@...nel.org,
        bpf@...r.kernel.org, ccross@...roid.com, daniel@...earbox.net,
        davem@...emloft.net, dvyukov@...gle.com, edumazet@...gle.com,
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        keescook@...omium.org, kpsingh@...omium.org, kuba@...nel.org,
        kuznet@....inr.ac.ru, linux-kernel@...r.kernel.org,
        mathew.j.martineau@...ux.intel.com, matthieu.baerts@...sares.net,
        mptcp@...ts.01.org, netdev@...r.kernel.org, omosnace@...hat.com,
        pabeni@...hat.com, paul@...l-moore.com,
        penguin-kernel@...ove.SAKURA.ne.jp, selinux@...r.kernel.org,
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        syzkaller-bugs@...glegroups.com, tony.luck@...el.com, yhs@...com,
        yoshfuji@...ux-ipv6.org
Subject: Re: general protection fault in selinux_socket_recvmsg

syzbot has bisected this bug to:

commit 263e1201a2c324b60b15ecda5de9ebf1e7293e31
Author: Paolo Abeni <pabeni@...hat.com>
Date:   Thu Apr 30 13:01:51 2020 +0000

    mptcp: consolidate synack processing.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12a5254a100000
start commit:   051143e1 Merge tag 'apparmor-pr-2020-05-21' of git://git.k..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=11a5254a100000
console output: https://syzkaller.appspot.com/x/log.txt?x=16a5254a100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b3368ce0cc5f5ace
dashboard link: https://syzkaller.appspot.com/bug?extid=c6bfc3db991edc918432
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13eeacba100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=167163e6100000

Reported-by: syzbot+c6bfc3db991edc918432@...kaller.appspotmail.com
Fixes: 263e1201a2c3 ("mptcp: consolidate synack processing.")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection