linux-kernel - INFO: trying to register non-static key in l2cap_chan

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Message-ID: <000000000000dabdc805ac4461b5@google.com>
Date:   Fri, 07 Aug 2020 00:16:23 -0700
From:   syzbot <syzbot+3ae233f384d5b0aaa9e0@...kaller.appspotmail.com>
To:     davem@...emloft.net, johan.hedberg@...il.com, kuba@...nel.org,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        marcel@...tmann.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: INFO: trying to register non-static key in l2cap_chan_close

Hello,

syzbot found the following issue on:

HEAD commit:    01830e6c Add linux-next specific files for 20200731
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=171e3dc6900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2e226b2d1364112c
dashboard link: https://syzkaller.appspot.com/bug?extid=3ae233f384d5b0aaa9e0
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15e18fec900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3ae233f384d5b0aaa9e0@...kaller.appspotmail.com

INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 6982 Comm: kworker/0:1 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events l2cap_chan_timeout
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 assign_lock_key kernel/locking/lockdep.c:894 [inline]
 register_lock_class+0x157d/0x1630 kernel/locking/lockdep.c:1206
 __lock_acquire+0xf9/0x5640 kernel/locking/lockdep.c:4303
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5003
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 lock_sock_nested+0x3b/0x110 net/core/sock.c:3048
 l2cap_sock_teardown_cb+0x88/0x400 net/bluetooth/l2cap_sock.c:1520
 l2cap_chan_close+0x2cc/0xb10 net/bluetooth/l2cap_core.c:832
 l2cap_chan_timeout+0x173/0x450 net/bluetooth/l2cap_core.c:436
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

---
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