linux-kernel - Re: general protection fault in override

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Message-ID: <0000000000001b5b540598ba2498@google.com>
Date:   Mon, 02 Dec 2019 07:22:00 -0800
From:   syzbot <syzbot+5320383e16029ba057ff@...kaller.appspotmail.com>
To:     Anna.Schumaker@...app.com, Anna.Schumaker@...app.com,
        axboe@...nel.dk, casey@...aufler-ca.com, dhowells@...hat.com,
        dvyukov@...gle.com, io-uring@...r.kernel.org, jannh@...gle.com,
        keescook@...omium.org, kstewart@...uxfoundation.org,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, neilb@...e.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        viro@...iv.linux.org.uk
Subject: Re: general protection fault in override_creds

syzbot has bisected this bug to:

commit 181e448d8709e517c9c7b523fcd209f24eb38ca7
Author: Jens Axboe <axboe@...nel.dk>
Date:   Mon Nov 25 15:52:30 2019 +0000

     io_uring: async workers should inherit the user creds

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10424ceae00000
start commit:   b94ae8ad Merge tag 'seccomp-v5.5-rc1' of git://git.kernel...
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=12424ceae00000
console output: https://syzkaller.appspot.com/x/log.txt?x=14424ceae00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ff560c3de405258c
dashboard link: https://syzkaller.appspot.com/bug?extid=5320383e16029ba057ff
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12dd682ae00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16290abce00000

Reported-by: syzbot+5320383e16029ba057ff@...kaller.appspotmail.com
Fixes: 181e448d8709 ("io_uring: async workers should inherit the user  
creds")

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