------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 1 PID: 4313 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505
Modules linked in:
CPU: 1 PID: 4313 Comm: syz-executor.4 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd 40 31 05 8a 4c 89 ee 48 c7 c7 40 25 05 8a e8 a2 ff 25 05 <0f> 0b 83 05 b5 48 b3 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0018:ffffc90004167928 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000
RDX: ffff8880789aa280 RSI: ffffffff815e44f8 RDI: fffff5200082cf17
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815de25e R11: 0000000000000000 R12: ffffffff89adecc0
R13: ffffffff8a052bc0 R14: ffffffff81655f60 R15: 1ffff9200082cf30
FS:  0000555555bd5400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ea21000 CR3: 000000007ce66000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 debug_object_assert_init lib/debugobjects.c:895 [inline]
 debug_object_assert_init+0x1f4/0x2e0 lib/debugobjects.c:866
 debug_timer_assert_init kernel/time/timer.c:739 [inline]
 debug_assert_init kernel/time/timer.c:784 [inline]
 del_timer+0x6d/0x110 kernel/time/timer.c:1204
 try_to_grab_pending+0x6d/0xd0 kernel/workqueue.c:1285
 __cancel_work kernel/workqueue.c:3268 [inline]
 cancel_delayed_work+0x79/0x340 kernel/workqueue.c:3297
 l2cap_clear_timer include/net/bluetooth/l2cap.h:883 [inline]
 l2cap_chan_del+0x517/0xa80 net/bluetooth/l2cap_core.c:665
 l2cap_chan_close+0x1b9/0xaf0 net/bluetooth/l2cap_core.c:825
 l2cap_sock_shutdown+0x3d2/0x1070 net/bluetooth/l2cap_sock.c:1377
 l2cap_sock_release+0x72/0x200 net/bluetooth/l2cap_sock.c:1420
 __sock_release+0xcd/0x280 net/socket.c:650
 sock_close+0x18/0x20 net/socket.c:1318
 __fput+0x286/0x9f0 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f891d5ecc2b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007fffe27f1650 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f891d5ecc2b
RDX: ffffffffffffffbc RSI: 00007f891d3b2c00 RDI: 0000000000000004
RBP: 00007f891d74e960 R08: 0000000000000000 R09: 00000000d06de815
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000001ed36
R13: 00007fffe27f1750 R14: 00007fffe27f1770 R15: 0000000000000032
 </TASK>