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

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Date: Sat, 17 Feb 2024 11:33:03 -0800
From: syzbot <syzbot+1683f76f1b20b826de67@...kaller.appspotmail.com>
To: davem@...emloft.net, 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, verdre@...d.nl
Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in
 hci_conn_drop (2)

syzbot has bisected this issue to:

commit 456561ba8e495e9320c1f304bf1cd3d1043cbe7b
Author: Jonas Dreßler <verdre@...d.nl>
Date:   Tue Feb 6 11:08:13 2024 +0000

    Bluetooth: hci_conn: Only do ACL connections sequentially

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=132137fc180000
start commit:   2c3b09aac00d Add linux-next specific files for 20240214
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10a137fc180000
console output: https://syzkaller.appspot.com/x/log.txt?x=172137fc180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=176d2dcbf8ba7017
dashboard link: https://syzkaller.appspot.com/bug?extid=1683f76f1b20b826de67
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1765258a180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16c27a58180000

Reported-by: syzbot+1683f76f1b20b826de67@...kaller.appspotmail.com
Fixes: 456561ba8e49 ("Bluetooth: hci_conn: Only do ACL connections sequentially")

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