------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0 WARNING: CPU: 1 PID: 18570 at lib/debugobjects.c:508 debug_print_object lib/debugobjects.c:505 [inline] WARNING: CPU: 1 PID: 18570 at lib/debugobjects.c:508 debug_object_assert_init+0x1fa/0x250 lib/debugobjects.c:890 Modules linked in: CPU: 1 PID: 18570 Comm: syz-executor.5 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 lib/debugobjects.c:505 [inline] RIP: 0010:debug_object_assert_init+0x1fa/0x250 lib/debugobjects.c:890 Code: e8 3b 0a c8 fd 4c 8b 45 00 48 c7 c7 80 2a 72 8a 48 c7 c6 e0 26 72 8a 48 c7 c2 c0 2c 72 8a 31 c9 49 89 d9 31 c0 e8 f6 f4 4d fd <0f> 0b ff 05 0a 36 19 0a 48 83 c5 38 48 89 e8 48 c1 e8 03 42 80 3c RSP: 0018:ffffc90009adf678 EFLAGS: 00010046 RAX: b38182a715a4e400 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc9001447c000 RSI: 000000000000e55e RDI: 000000000000e55f RBP: ffffffff8a10c080 R08: ffffffff81653722 R09: ffffed1017363f1c R10: ffffed1017363f1c R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888084de0200 R14: 0000000000000002 R15: ffffffff90f10be8 FS: 00007f125f491700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f125f44f718 CR3: 0000000029542000 CR4: 00000000001506e0 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+0x122/0xb50 kernel/workqueue.c:1252 __cancel_work kernel/workqueue.c:3227 [inline] cancel_delayed_work+0x8e/0x360 kernel/workqueue.c:3256 l2cap_clear_timer include/net/bluetooth/l2cap.h:882 [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:599 [inline] sock_close+0xd8/0x260 net/socket.c:1258 __fput+0x352/0x7b0 fs/file_table.c:280 task_work_run+0x146/0x1c0 kernel/task_work.c:161 get_signal+0x20d2/0x2180 kernel/signal.c:2591 arch_do_signal_or_restart+0x8e/0x6c0 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+0xac/0x200 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x26/0x70 kernel/entry/common.c:301 do_syscall_64+0x4b/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:00007f125f491188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: fffffffffffffffc RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 000000000000000e RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffdf23007ef R14: 00007f125f491300 R15: 0000000000022000