------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0 WARNING: CPU: 0 PID: 5901 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 0 PID: 5901 Comm: syz-executor575 Not tainted 5.11.0-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 60 c9 dd 88 4c 89 ee 48 c7 c7 60 bd dd 88 e8 cc a1 7f 04 <0f> 0b 83 05 35 6b bc 08 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc9000194f900 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000329f12 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880b9e2015b R10: ffffed10173c402b R11: 203a47554245444f R12: ffffffff888cd180 R13: ffffffff88ddc3e0 R14: ffffffff81594a20 R15: 1ffff92000329f2b FS: 0000555555ed7300(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efff1ad4990 CR3: 0000000022054000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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+0x65/0xf0 kernel/time/timer.c:1202 try_to_grab_pending+0x41/0x80 kernel/workqueue.c:1252 __cancel_work kernel/workqueue.c:3227 [inline] cancel_delayed_work+0x6d/0x260 kernel/workqueue.c:3256 l2cap_clear_timer include/net/bluetooth/l2cap.h:881 [inline] l2cap_chan_del+0x43b/0x8e0 net/bluetooth/l2cap_core.c:661 l2cap_chan_close+0x183/0x990 net/bluetooth/l2cap_core.c:823 l2cap_sock_shutdown+0x31c/0xe40 net/bluetooth/l2cap_sock.c:1339 l2cap_sock_release+0x5d/0x1e0 net/bluetooth/l2cap_sock.c:1382 __sock_release+0xbb/0x270 net/socket.c:597 sock_close+0xf/0x20 net/socket.c:1256 __fput+0x204/0x870 fs/file_table.c:280 task_work_run+0xc0/0x160 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x249/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f030f0e505b 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:00007ffe16ac7450 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f030f0e505b RDX: ffffffffffffffb8 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 0000000000000003 R08: 0000000000000000 R09: 000000ff00000001 R10: 000000ff00000001 R11: 0000000000000293 R12: 0000555555ed72b8 R13: 0000000000000011 R14: 00007ffe16ac74c0 R15: 0000000000000003