BUG: unable to handle kernel paging request at ffffffff85c56e28
IP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
IP: __lock_acquire+0x21e/0x3f20 kernel/locking/lockdep.c:3382
PGD 8e6b067 P4D 8e6b067 PUD 8e6c063 PMD 5c001e1 
Oops: 0003 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 8001 Comm: kworker/0:3 Not tainted 4.14.231-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events l2cap_chan_timeout
task: ffff88805c45a200 task.stack: ffff88805c460000
RIP: 0010:atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
RIP: 0010:__lock_acquire+0x21e/0x3f20 kernel/locking/lockdep.c:3382
RSP: 0000:ffff88805c4679a8 EFLAGS: 00010086
RAX: ffffffff85c56cf0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffff11014ada6ed RSI: 0000000000000000 RDI: ffff8880a56d3768
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffff88805c45a200 R12: ffff8880a56d3760
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8bebbd40
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff85c56e28 CR3: 00000000a4207000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:176
 spin_lock_bh include/linux/spinlock.h:322 [inline]
 lock_sock_nested+0x39/0x100 net/core/sock.c:2788
 l2cap_sock_teardown_cb+0x93/0x650 net/bluetooth/l2cap_sock.c:1341
 l2cap_chan_del+0xaf/0x950 net/bluetooth/l2cap_core.c:599
 l2cap_chan_close+0x103/0x870 net/bluetooth/l2cap_core.c:757
 l2cap_chan_timeout+0x143/0x2a0 net/bluetooth/l2cap_core.c:430
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 fc ff df 41 89 f6 4b 8d 7c f4 08 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 2a 00 00 4b 8b 44 f4 08 48 85 c0 0f 84 31 ff ff ff <f0> ff 80 38 01 00 00 49 8d b3 80 08 00 00 48 ba 00 00 00 00 00 
RIP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline] RSP: ffff88805c4679a8
RIP: __lock_acquire+0x21e/0x3f20 kernel/locking/lockdep.c:3382 RSP: ffff88805c4679a8
CR2: ffffffff85c56e28
---[ end trace 3eaf9fcfaefebd8a ]---