------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0 WARNING: CPU: 2 PID: 9792 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 2 PID: 9792 Comm: syz-executor.0 Not tainted 5.12.0-rc8-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 a0 2c c2 89 4c 89 ee 48 c7 c7 a0 20 c2 89 e8 0b ba f5 04 <0f> 0b 83 05 a5 bd f8 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc90009c77688 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815c4d25 RDI: fffff5200138eec3 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815bdabe R11: 0000000000000000 R12: ffffffff896d8000 R13: ffffffff89c22720 R14: ffffffff8162dd60 R15: 1ffff9200138eedc FS: 0000000000000000(0000) GS:ffff88802cc00000(0063) knlGS:00000000f552eb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f550ddb0 CR3: 000000007593a000 CR4: 0000000000150ee0 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+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:140 get_signal+0x1ba2/0x2150 kernel/signal.c:2554 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+0x148/0x250 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_fast_syscall_32+0x62/0x90 arch/x86/entry/common.c:143 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:165 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f34549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f552e5fc EFLAGS: 00000296 ORIG_RAX: 000000000000016a RAX: fffffffffffffffc RBX: 0000000000000004 RCX: 0000000020000000 RDX: 000000000000000e RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000