------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 0 PID: 7516 at lib/debugobjects.c:508 debug_print_object+0x67/0x80 lib/debugobjects.c:505
Modules linked in:
CPU: 0 PID: 7516 Comm: syz-executor.2 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+0x67/0x80 lib/debugobjects.c:505
Code: 8b 43 10 83 c2 01 4c 89 e6 48 c7 c7 30 ec f7 83 89 15 d1 5a 5a 04 8b 4b 14 4c 8b 45 00 48 8b 14 c5 40 72 7a 83 e8 7d 22 33 01 <0f> 0b 5b 83 05 db 16 c5 02 01 5d 41 5c c3 83 05 d0 16 c5 02 01 c3
RSP: 0018:ffffc9000206bac0 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffffc9000206bae0 RCX: 0000000000000001
RDX: 0000000080000001 RSI: ffffffff84087869 RDI: 00000000ffffffff
RBP: ffffffff8362e180 R08: 0000000000000000 R09: c0000000ffffdfff
R10: ffffc9000206b8f0 R11: ffffc9000206b8e8 R12: ffffffff83f7ee22
R13: 000000000002a0c0 R14: ffffffff862c9e28 R15: ffff8881158ef800
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 0000000117057004 CR4: 00000000001706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 debug_object_assert_init+0x147/0x180 lib/debugobjects.c:890
 debug_timer_assert_init kernel/time/timer.c:737 [inline]
 debug_assert_init kernel/time/timer.c:782 [inline]
 del_timer+0x29/0x80 kernel/time/timer.c:1202
 try_to_grab_pending+0x168/0x300 kernel/workqueue.c:1252
 __cancel_work kernel/workqueue.c:3227 [inline]
 cancel_delayed_work+0x29/0xd0 kernel/workqueue.c:3256
 l2cap_clear_timer include/net/bluetooth/l2cap.h:881 [inline]
 l2cap_chan_del+0x112/0x320 net/bluetooth/l2cap_core.c:661
 l2cap_chan_close+0xfb/0x270 net/bluetooth/l2cap_core.c:823
 l2cap_sock_shutdown+0x11b/0x460 net/bluetooth/l2cap_sock.c:1339
 l2cap_sock_release+0x3e/0xd0 net/bluetooth/l2cap_sock.c:1382
 __sock_release+0x32/0xa0 net/socket.c:597
 sock_close+0xf/0x20 net/socket.c:1256
 __fput+0xa1/0x250 fs/file_table.c:280
 task_work_run+0x68/0xb0 kernel/task_work.c:140
 exit_task_work include/linux/task_work.h:30 [inline]
 do_exit+0x45c/0xd40 kernel/exit.c:825
 do_group_exit+0x42/0xb0 kernel/exit.c:922
 get_signal+0x151/0xc40 kernel/signal.c:2770
 arch_do_signal_or_restart+0xaa/0x8f0 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+0x1b7/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x40/0x80 kernel/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d4d9
Code: Unable to access opcode bytes at RIP 0x45d4af.
RSP: 002b:00007f7f3a9d2c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffffc RBX: 0000000000002100 RCX: 000000000045d4d9
RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000004
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffc4583df0f R14: 00007f7f3a9d39c0 R15: 000000000118cf4c