------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 0 PID: 31695 at lib/debugobjects.c:508 debug_print_object lib/debugobjects.c:505 [inline]
WARNING: CPU: 0 PID: 31695 at lib/debugobjects.c:508 debug_object_assert_init+0x1fa/0x250 lib/debugobjects.c:890
Modules linked in:
CPU: 0 PID: 31695 Comm: syz-executor.5 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_print_object lib/debugobjects.c:505 [inline]
RIP: 0010:debug_object_assert_init+0x1fa/0x250 lib/debugobjects.c:890
Code: e8 fb 9e d5 fd 4c 8b 45 00 48 c7 c7 60 d6 6d 8a 48 c7 c6 c0 d2 6d 8a 48 c7 c2 a0 d8 6d 8a 31 c9 49 89 d9 31 c0 e8 a6 cf 5c fd <0f> 0b ff 05 ba 83 86 09 48 83 c5 38 48 89 e8 48 c1 e8 03 42 80 3c
RSP: 0018:ffffc90015db7558 EFLAGS: 00010046
RAX: 274d0c2383acc500 RBX: 0000000000000000 RCX: ffff88801cf38000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffffff8a10ac20 R08: ffffffff8163c792 R09: ffffed1017384004
R10: ffffed1017384004 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888018b46200 R14: 0000000000000003 R15: ffffffff8fbaa690
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000749138 CR3: 000000000c08e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 debug_timer_assert_init kernel/time/timer.c:737 [inline]
 debug_assert_init kernel/time/timer.c:782 [inline]
 del_timer+0x7e/0x390 kernel/time/timer.c:1202
 try_to_grab_pending+0x111/0xab0 kernel/workqueue.c:1252
 __cancel_work kernel/workqueue.c:3227 [inline]
 cancel_delayed_work+0x7f/0x2c0 kernel/workqueue.c:3256
 l2cap_clear_timer include/net/bluetooth/l2cap.h:881 [inline]
 l2cap_chan_del+0x411/0x610 net/bluetooth/l2cap_core.c:661
 l2cap_sock_shutdown+0x421/0x880 net/bluetooth/l2cap_sock.c:1339
 l2cap_sock_release+0x68/0x1c0 net/bluetooth/l2cap_sock.c:1382
 __sock_release net/socket.c:597 [inline]
 sock_close+0xd8/0x260 net/socket.c:1256
 __fput+0x34d/0x7a0 fs/file_table.c:280
 task_work_run+0x137/0x1c0 kernel/task_work.c:140
 exit_task_work include/linux/task_work.h:30 [inline]
 do_exit+0x769/0x2490 kernel/exit.c:825
 do_group_exit+0x168/0x2d0 kernel/exit.c:922
 get_signal+0x16b5/0x2030 kernel/signal.c:2770
 arch_do_signal_or_restart+0x8e/0x6a0 arch/x86/kernel/signal.c:811
 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+0xac/0x1e0 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x48/0x190 kernel/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: Unable to access opcode bytes at RIP 0x45e1ef.
RSP: 002b:00007f1dd0e9cc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 000000000045e219
RDX: 000000000000000e RSI: 0000000020000100 RDI: 0000000000000004
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fff95132ddf R14: 00007f1dd0e9d9c0 R15: 000000000119bf8c