------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 1 PID: 22211 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505
Modules linked in:
CPU: 1 PID: 22211 Comm: syz-executor.1 Not tainted 5.12.0-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 20 93 c2 89 4c 89 ee 48 c7 c7 20 87 c2 89 e8 e7 7c f7 04 <0f> 0b 83 05 95 ee f6 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0018:ffffc90001c2f6a0 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815c7bd5 RDI: fffff52000385ec6
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815c1a3e R11: 0000000000000000 R12: ffffffff896d8f20
R13: ffffffff89c28da0 R14: ffffffff81634560 R15: 1ffff92000385edf
FS:  00007f64d64ae700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64d648d718 CR3: 000000001e0df000 CR4: 0000000000350ee0
Call Trace:
 debug_object_assert_init lib/debugobjects.c:890 [inline]
 debug_object_assert_init+0x1f4/0x2e0 lib/debugobjects.c:861
 debug_timer_assert_init kernel/time/timer.c:737 [inline]
 debug_assert_init kernel/time/timer.c:782 [inline]
 del_timer+0x6d/0x110 kernel/time/timer.c:1202
 try_to_grab_pending+0x6d/0xd0 kernel/workqueue.c:1252
 __cancel_work kernel/workqueue.c:3227 [inline]
 cancel_delayed_work+0x79/0x340 kernel/workqueue.c:3256
 l2cap_clear_timer include/net/bluetooth/l2cap.h:882 [inline]
 l2cap_chan_del+0x517/0xa80 net/bluetooth/l2cap_core.c:661
 l2cap_chan_close+0x1bc/0xaf0 net/bluetooth/l2cap_core.c:823
 l2cap_sock_shutdown+0x3e7/0x1100 net/bluetooth/l2cap_sock.c:1339
 l2cap_sock_release+0x72/0x200 net/bluetooth/l2cap_sock.c:1382
 __sock_release+0xcd/0x280 net/socket.c:599
 sock_close+0x18/0x20 net/socket.c:1258
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:161
 get_signal+0x1ba2/0x2150 kernel/signal.c:2591
 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:789
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x171/0x280 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f64d64ae188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffffc RBX: 000000000056bf60 RCX: 00000000004665f9
RDX: 000000000000000e RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffd34ad0e1f R14: 00007f64d64ae300 R15: 0000000000022000