xt_recent: Unsupported user space flags (000000fe)
------------[ cut here ]------------
kernel BUG at kernel/time/timer.c:958!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 4213 Comm: syz-executor6 Not tainted 4.16.0-rc1+ #223
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__mod_timer kernel/time/timer.c:958 [inline]
RIP: 0010:mod_timer+0x7d6/0x13c0 kernel/time/timer.c:1102
RSP: 0018:ffff8801db506ce8 EFLAGS: 00010206
RAX: ffff8801b3eae4c0 RBX: ffff8801d09b49d0 RCX: ffffffff8160a5a6
RDX: 0000000000000100 RSI: 00000000fffbf843 RDI: ffff8801d09b49e8
RBP: ffff8801db506f88 R08: 0000000000000000 R09: 1ffff1003b6a0dca
R10: ffff8801db506e18 R11: 0000000000000004 R12: dffffc0000000000
R13: ffff8801db506f60 R14: 00000000fffbf843 R15: ffff8801c156ee50
FS:  00000000020dd940(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe259111d9 CR3: 00000001d6f90001 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 led_tg+0x1db/0x2e0 net/netfilter/xt_LED.c:75
 ip6t_do_table+0xc2a/0x1a30 net/ipv6/netfilter/ip6_tables.c:365
 ip6table_filter_hook+0x65/0x80 net/ipv6/netfilter/ip6table_filter.c:41
 nf_hook_entry_hookfn include/linux/netfilter.h:120 [inline]
 nf_hook_slow+0xba/0x1a0 net/netfilter/core.c:483
 nf_hook.constprop.27+0x3f6/0x830 include/linux/netfilter.h:243
 NF_HOOK include/linux/netfilter.h:286 [inline]
 ndisc_send_skb+0xa51/0x1370 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x126/0x670 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x363/0x6b0 net/ipv6/addrconf.c:3769
 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+0xa9/0xb0 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777 [inline]
RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:3923
RSP: 0018:ffff8801d6f0ef28 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff12
RAX: dffffc0000000000 RBX: ffff8801b3eae4c0 RCX: 0000000000000000
RDX: 1ffffffff0d592cd RSI: 000000009899986f RDI: 0000000000000282
RBP: ffff8801d6f0f020 R08: 1ffff1003ade1d49 R09: 0000000000000002
R10: ffff8801d6f0ef08 R11: 0000000000000000 R12: 1ffff1003ade1deb
R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:244 [inline]
 rcu_read_lock include/linux/rcupdate.h:630 [inline]
 __d_lookup+0x101/0x830 fs/dcache.c:2302
 d_lookup+0x1b2/0x2e0 fs/dcache.c:2251
 d_hash_and_lookup+0x129/0x1a0 fs/dcache.c:2350
 proc_flush_task_mnt fs/proc/base.c:3057 [inline]
 proc_flush_task+0x2a0/0x680 fs/proc/base.c:3129
 release_task+0x258/0x1a40 kernel/exit.c:195
 wait_task_zombie kernel/exit.c:1161 [inline]
 wait_consider_task+0x2a10/0x3420 kernel/exit.c:1388
 do_wait_thread kernel/exit.c:1451 [inline]
 do_wait+0x427/0xa70 kernel/exit.c:1522
 kernel_wait4+0x1f5/0x370 kernel/exit.c:1665
 SYSC_wait4+0x134/0x140 kernel/exit.c:1677
 SyS_wait4+0x2c/0x40 kernel/exit.c:1673
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x40dd9a
RSP: 002b:0000000000a2ed68 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 0000000000000011 RCX: 000000000040dd9a
RDX: 0000000040000001 RSI: 0000000000a2ed94 RDI: ffffffffffffffff
RBP: 0000000000a2eda0 R08: 0000000000000001 R09: 00000000020dd940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000a2f420
R13: 00000000000000ba R14: 0000000000000000 R15: 00000000020dd914
Code: 85 2a 0b 00 00 4d 8b 3c 24 4d 85 ff 75 9f 4c 8b bd 60 fd ff ff e8 bb 57 10 00 65 ff 0d b4 47 a1 7e e9 d9 fc ff ff e8 aa 57 10 00 <0f> 0b e8 a3 57 10 00 e9 14 fb ff ff e8 99 57 10 00 4c 89 bd 70 
RIP: __mod_timer kernel/time/timer.c:958 [inline] RSP: ffff8801db506ce8
RIP: mod_timer+0x7d6/0x13c0 kernel/time/timer.c:1102 RSP: ffff8801db506ce8
---[ end trace ba32d26fa4225fef ]---