linux-kernel - Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in l2cap_unregister

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Message-ID: <6769e42e.050a0220.226966.0047.GAE@google.com>
Date: Mon, 23 Dec 2024 14:29:02 -0800
From: syzbot <syzbot+14b6d57fb728e27ce23c@...kaller.appspotmail.com>
To: davem@...emloft.net, hdanton@...a.com, johan.hedberg@...il.com, 
	kuba@...nel.org, linux-bluetooth@...r.kernel.org, 
	linux-kernel@...r.kernel.org, luiz.dentz@...il.com, luiz.von.dentz@...el.com, 
	marcel@...tmann.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in l2cap_unregister_user

syzbot has bisected this issue to:

commit c8992cffbe7411c6da4c4416d5eecfc6b78e0fec
Author: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
Date:   Wed Dec 1 18:55:05 2021 +0000

    Bluetooth: hci_event: Use of a function table to handle Command Complete

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14d538c4580000
start commit:   30b981796b94 selftests: drv-net: test empty queue and NAPI..
git tree:       net
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16d538c4580000
console output: https://syzkaller.appspot.com/x/log.txt?x=12d538c4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6a2b862bf4a5409f
dashboard link: https://syzkaller.appspot.com/bug?extid=14b6d57fb728e27ce23c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12050adf980000

Reported-by: syzbot+14b6d57fb728e27ce23c@...kaller.appspotmail.com
Fixes: c8992cffbe74 ("Bluetooth: hci_event: Use of a function table to handle Command Complete")

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