------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 1 PID: 2423 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505
Modules linked in:
CPU: 1 PID: 2423 Comm: syz-executor.1 Not tainted 5.14.0-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 c0 2d e4 89 4c 89 ee 48 c7 c7 c0 21 e4 89 e8 8f b4 14 05 <0f> 0b 83 05 b5 5e 91 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0018:ffffc9000adb7928 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000
RDX: ffff8880120c3900 RSI: ffffffff815dbd58 RDI: fffff520015b6f17
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d5afe R11: 0000000000000000 R12: ffffffff898de0a0
R13: ffffffff89e42840 R14: ffffffff8164bab0 R15: 1ffff920015b6f30
FS:  0000555555cdb400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2de23000 CR3: 000000007e912000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 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:1270
 __cancel_work kernel/workqueue.c:3258 [inline]
 cancel_delayed_work+0x79/0x340 kernel/workqueue.c:3287
 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+0x3b6/0x1040 net/bluetooth/l2cap_sock.c:1347
 l2cap_sock_release+0x72/0x200 net/bluetooth/l2cap_sock.c:1390
 __sock_release+0xcd/0x280 net/socket.c:649
 sock_close+0x18/0x20 net/socket.c:1314
 __fput+0x288/0x9f0 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:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f505d52b54b
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:00007ffe3f759000 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f505d52b54b
RDX: 0000000000000000 RSI: ffffffff89349968 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2de22a1c
R10: 000000000000072e R11: 0000000000000293 R12: 00007f505d67db00
R13: 00007f505d67db00 R14: 00007f505d67cf80 R15: 00000000000cbd8a