linux-kernel - Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock

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Message-ID: <000000000000042dd9060bcf5c23@google.com>
Date:   Tue, 05 Dec 2023 19:58:10 -0800
From:   syzbot <syzbot+4c0d0c4cde787116d465@...kaller.appspotmail.com>
To:     davem@...emloft.net, eadavis@...com, edumazet@...gle.com,
        hdanton@...a.com, johan.hedberg@...il.com, kuba@...nel.org,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        lizhi.xu@...driver.com, luiz.dentz@...il.com,
        luiz.von.dentz@...el.com, marcel@...tmann.org,
        netdev@...r.kernel.org, pabeni@...hat.com,
        syzkaller-bugs@...glegroups.com, yuran.pereira@...mail.com
Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout

syzbot has bisected this issue to:

commit 9a8ec9e8ebb5a7c0cfbce2d6b4a6b67b2b78e8f3
Author: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
Date:   Thu Mar 30 21:15:50 2023 +0000

    Bluetooth: SCO: Fix possible circular locking dependency on sco_connect_cfm

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=179a65d2e80000
start commit:   bee0e7762ad2 Merge tag 'for-linus-iommufd' of git://git.ke..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=145a65d2e80000
console output: https://syzkaller.appspot.com/x/log.txt?x=105a65d2e80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b50bd31249191be8
dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1504504ae80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14685f54e80000

Reported-by: syzbot+4c0d0c4cde787116d465@...kaller.appspotmail.com
Fixes: 9a8ec9e8ebb5 ("Bluetooth: SCO: Fix possible circular locking dependency on sco_connect_cfm")

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