linux-kernel - Re: [syzbot] KASAN: use-after-free Read in filp

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Date:   Sun, 05 Jun 2022 07:04:10 -0700
From:   syzbot <syzbot+47dd250f527cb7bebf24@...kaller.appspotmail.com>
To:     arve@...roid.com, asml.silence@...il.com, axboe@...nel.dk,
        brauner@...nel.org, gregkh@...uxfoundation.org, hdanton@...a.com,
        hridya@...gle.com, io-uring@...r.kernel.org,
        joel@...lfernandes.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, maco@...roid.com, surenb@...gle.com,
        syzkaller-bugs@...glegroups.com, tkjos@...roid.com,
        viro@...iv.linux.org.uk
Subject: Re: [syzbot] KASAN: use-after-free Read in filp_close

syzbot has bisected this issue to:

commit 6319194ec57b0452dcda4589d24c4e7db299c5bf
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Thu May 12 21:08:03 2022 +0000

    Unify the primitives for file descriptor closing

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=134cbe4ff00000
start commit:   952923ddc011 Merge tag 'pull-18-rc1-work.namei' of git://g..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10ccbe4ff00000
console output: https://syzkaller.appspot.com/x/log.txt?x=174cbe4ff00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3096247591885bfa
dashboard link: https://syzkaller.appspot.com/bug?extid=47dd250f527cb7bebf24
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=114f7bcdf00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1659a94ff00000

Reported-by: syzbot+47dd250f527cb7bebf24@...kaller.appspotmail.com
Fixes: 6319194ec57b ("Unify the primitives for file descriptor closing")

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