syzbot

x_tables: ip6_tables: TCPMSS target: only valid for protocol 6
x_tables: ip6_tables: TCPMSS target: only valid for protocol 6
x_tables: ip6_tables: TCPMSS target: only valid for protocol 6
------------[ cut here ]------------
ODEBUG: activate not available (active state 0) object type: work_struct hint: 0x8
WARNING: CPU: 0 PID: 4178 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: 4178 Comm: syzkaller885166 Not tainted 4.16.0-rc1+ #315
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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+0x58/0x80 arch/x86/entry/entry_64.S:957
RIP: 0010:debug_print_object+0x166/0x220 lib/debugobjects.c:288
RSP: 0018:ffff8801db407400 EFLAGS: 00010082
RAX: dffffc0000000008 RBX: 0000000000000005 RCX: ffffffff815abdbe
RDX: 0000000000000100 RSI: 1ffff1003b680e30 RDI: 1ffff1003b680e05
RBP: ffff8801db407440 R08: 0000000000000000 R09: 1ffff1003b680dd7
R10: ffff8801db407300 R11: 0000000000000002 R12: 0000000000000001
R13: ffffffff86b14d80 R14: ffffffff86007d60 R15: ffffffff8147ac00
 debug_object_activate+0x390/0x730 lib/debugobjects.c:475
 debug_work_activate kernel/workqueue.c:493 [inline]
 __queue_work+0x163/0x1230 kernel/workqueue.c:1382
 queue_work_on+0x16a/0x1c0 kernel/workqueue.c:1488
 queue_work include/linux/workqueue.h:488 [inline]
 schedule_work include/linux/workqueue.h:546 [inline]
 idletimer_tg_expired+0x44/0x60 net/netfilter/xt_IDLETIMER.c:116
 call_timer_fn+0x228/0x820 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666
 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692
 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285
 invoke_softirq kernel/softirq.c:365 [inline]
 irq_exit+0x1cc/0x200 kernel/softirq.c:405
 exiting_irq arch/x86/include/asm/apic.h:541 [inline]
 smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052
 apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:796
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x5e/0xba kernel/locking/spinlock.c:184
RSP: 0018:ffff8801b1a7f3c8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff12
RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 0000000000000006
RDX: 1ffffffff0d592d5 RSI: 1ffff10035eb5d5b RDI: 0000000000000282
RBP: ffff8801b1a7f3d8 R08: 1ffff1003634fe47 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff86cfcbe0
R13: 0000000000000282 R14: ffffed003634fe8b R15: ffff8801b33f25e8
 fill_pool lib/debugobjects.c:119 [inline]
 __debug_object_init+0xa7a/0x1040 lib/debugobjects.c:339
 debug_object_init+0x17/0x20 lib/debugobjects.c:391
 __init_work+0x2b/0x60 kernel/workqueue.c:506
 idletimer_tg_create net/netfilter/xt_IDLETIMER.c:152 [inline]
 idletimer_tg_checkentry+0x691/0xb00 net/netfilter/xt_IDLETIMER.c:213
 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:850
 check_target net/ipv6/netfilter/ip6_tables.c:533 [inline]
 find_check_entry.isra.7+0x935/0xcf0 net/ipv6/netfilter/ip6_tables.c:575
 translate_table+0xf52/0x1690 net/ipv6/netfilter/ip6_tables.c:744
 do_replace net/ipv6/netfilter/ip6_tables.c:1160 [inline]
 do_ip6t_set_ctl+0x370/0x5f0 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
 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1422
 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+0x280/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4468a9
RSP: 002b:00007fe91311cda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 00000000004468a9
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 00000000000002fb
RBP: 0000000000000000 R08: 0000000000000460 R09: 0000000000000000
R10: 0000000020103ba0 R11: 0000000000000246 R12: 00000000006dbc20
R13: 4292e4cc04c17464 R14: 372e72b5132b6474 R15: 0000000000000001
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..