INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 7731 Comm: syz-executor1 Not tainted 4.15.0+ #299
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 assign_lock_key kernel/locking/lockdep.c:729 [inline]
 register_lock_class+0x1b6c/0x2820 kernel/locking/lockdep.c:755
 __lock_acquire+0x1de/0x3e00 kernel/locking/lockdep.c:3319
 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
 del_timer_sync+0xba/0x240 kernel/time/timer.c:1283
 led_tg_destroy+0x2dd/0x3f0 net/netfilter/xt_LED.c:185
 cleanup_entry+0x242/0x380 net/ipv6/netfilter/ip6_tables.c:673
 do_replace net/ipv6/netfilter/ip6_tables.c:1172 [inline]
 do_ip6t_set_ctl+0x4bc/0x5f0 net/ipv6/netfilter/ip6_tables.c:1686
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927
 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975
 SYSC_setsockopt net/socket.c:1849 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1828
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453299
RSP: 002b:00007f1e918a9c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000013
RBP: 00000000000004d3 R08: 0000000000000400 R09: 0000000000000000
R10: 000000002000fc00 R11: 0000000000000212 R12: 00000000006f6468
R13: 00000000ffffffff R14: 00007f1e918aa6d4 R15: 0000000000000000
------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint:           (null)
WARNING: CPU: 0 PID: 7731 at lib/debugobjects.c:291 debug_print_object+0x166/0x220 lib/debugobjects.c:288
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7731 Comm: syz-executor1 Not tainted 4.15.0+ #299
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:984
RIP: 0010:debug_print_object+0x166/0x220 lib/debugobjects.c:288
RSP: 0018:ffff8801d96677a0 EFLAGS: 00010282
RAX: dffffc0000000008 RBX: 0000000000000005 RCX: ffffffff815a585e
RDX: 0000000000010000 RSI: ffffc900025b2000 RDI: 1ffff1003b2cce79
RBP: ffff8801d96677e0 R08: 0000000000000000 R09: 1ffff1003b2cce4b
R10: ffff8801d96676a0 R11: ffffffff86b39138 R12: 0000000000000001
R13: ffffffff86b4a9a0 R14: ffffffff86013a60 R15: ffffffff815f82c0
 debug_object_assert_init+0x303/0x570 lib/debugobjects.c:654
 debug_timer_assert_init kernel/time/timer.c:724 [inline]
 debug_assert_init kernel/time/timer.c:776 [inline]
 try_to_del_timer_sync+0x74/0x130 kernel/time/timer.c:1223
 del_timer_sync+0x18a/0x240 kernel/time/timer.c:1293
 led_tg_destroy+0x2dd/0x3f0 net/netfilter/xt_LED.c:185
 cleanup_entry+0x242/0x380 net/ipv6/netfilter/ip6_tables.c:673
 do_replace net/ipv6/netfilter/ip6_tables.c:1172 [inline]
 do_ip6t_set_ctl+0x4bc/0x5f0 net/ipv6/netfilter/ip6_tables.c:1686
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927
 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975
 SYSC_setsockopt net/socket.c:1849 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1828
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453299
RSP: 002b:00007f1e918a9c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000013
RBP: 00000000000004d3 R08: 0000000000000400 R09: 0000000000000000
R10: 000000002000fc00 R11: 0000000000000212 R12: 00000000006f6468
R13: 00000000ffffffff R14: 00007f1e918aa6d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..