linux-kernel - [syzbot] [bluetooth?] WARNING in hci_conn

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Message-ID: <67741d0e.050a0220.25abdd.0918.GAE@google.com>
Date: Tue, 31 Dec 2024 08:34:22 -0800
From: syzbot <syzbot+afa1843ff020b481e6b5@...kaller.appspotmail.com>
To: johan.hedberg@...il.com, linux-bluetooth@...r.kernel.org, 
	linux-kernel@...r.kernel.org, luiz.dentz@...il.com, marcel@...tmann.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bluetooth?] WARNING in hci_conn_drop

Hello,

syzbot found the following issue on:

HEAD commit:    573067a5a685 Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=10f7e0b0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cd7202b56d469648
dashboard link: https://syzkaller.appspot.com/bug?extid=afa1843ff020b481e6b5
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9d3b5c855aa0/disk-573067a5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0c06fc1ead83/vmlinux-573067a5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3390e59b9e4b/Image-573067a5.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+afa1843ff020b481e6b5@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 6472 at kernel/workqueue.c:2257 __queue_work+0xe80/0x1308 kernel/workqueue.c:2256
Modules linked in:
CPU: 1 UID: 0 PID: 6472 Comm: kworker/1:3 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events l2cap_chan_timeout
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __queue_work+0xe80/0x1308 kernel/workqueue.c:2256
lr : __queue_work+0xe80/0x1308 kernel/workqueue.c:2256
sp : ffff8000a5fc7820
x29: ffff8000a5fc7870 x28: 1fffe0001b107c00 x27: 001fffffffc00001
x26: dfff800000000000 x25: ffff0000ec829800 x24: 0000000000000008
x23: 1fffe00018dfc001 x22: ffff0000ec8299c0 x21: 0000000004208060
x20: ffff0000c1080408 x19: ffff0000f131c8e8 x18: ffff8000a5fc75a0
x17: 0000000000048c2a x16: ffff800083275834 x15: 0000000000000001
x14: 1fffe0001e26391d x13: 0000000000000000 x12: 0000000000000000
x11: ffff60001e26391e x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000c6fe0000 x7 : ffff800083277784 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0000f131c8e8 x1 : 0000000000200000 x0 : ffff0000d4acdd00
Call trace:
 __queue_work+0xe80/0x1308 kernel/workqueue.c:2256 (P)
 __queue_delayed_work+0x184/0x23c kernel/workqueue.c:2507
 queue_delayed_work_on+0xec/0x1b0 kernel/workqueue.c:2552
 queue_delayed_work include/linux/workqueue.h:677 [inline]
 hci_conn_drop+0x178/0x280 include/net/bluetooth/hci_core.h:1642
 l2cap_chan_del+0x228/0x470 net/bluetooth/l2cap_core.c:674
 l2cap_chan_close+0x4c8/0x82c
 l2cap_chan_timeout+0x128/0x288 net/bluetooth/l2cap_core.c:435
 process_one_work+0x7a8/0x15cc kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x97c/0xeec kernel/workqueue.c:3391
 kthread+0x288/0x310 kernel/kthread.c:389
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
irq event stamp: 163642
hardirqs last  enabled at (163641): [<ffff800080365520>] __cancel_work+0x1c4/0x29c kernel/workqueue.c:4331
hardirqs last disabled at (163642): [<ffff80008036074c>] queue_delayed_work_on+0x58/0x1b0 kernel/workqueue.c:2548
softirqs last  enabled at (163636): [<ffff80008976e8b0>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (163636): [<ffff80008976e8b0>] release_sock+0x154/0x1b8 net/core/sock.c:3646
softirqs last disabled at (163634): [<ffff80008976e798>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (163634): [<ffff80008976e798>] release_sock+0x3c/0x1b8 net/core/sock.c:3635
---[ end trace 0000000000000000 ]---


---
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