INFO: task syz-executor7:5335 blocked for more than 120 seconds.
      Not tainted 4.4.118-g239a415 #26
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor7   D ffff8800b1a17aa0 29688  5335   3702 0x20020004
 ffff8800b1a17aa0 0000000000000006 ffff8800b1a50000 ffffffff8113bd3a
 ffffed0016b32338 ffff8800b5991900 ffff8801db21fdb8 ffff8801db21fde0
 ffff8801db21f4d8 ffff8801cd77c800 ffff8800b1a50000 0000000000000000
Call Trace:
 [<ffffffff8376491a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3353
 [<ffffffff82df4161>] __lock_sock+0xf1/0x180 net/core/sock.c:1999
 [<ffffffff82df42e6>] lock_sock_nested+0xf6/0x120 net/core/sock.c:2453
 [<ffffffff833fe486>] lock_sock include/net/sock.h:1493 [inline]
 [<ffffffff833fe486>] ipv6_getorigdst+0x136/0x610 net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c:238
 [<ffffffff82f96b4d>] compat_nf_sockopt net/netfilter/nf_sockopt.c:140 [inline]
 [<ffffffff82f96b4d>] compat_nf_getsockopt+0xfd/0x130 net/netfilter/nf_sockopt.c:162
 [<ffffffff8335983a>] compat_ipv6_getsockopt+0x1fa/0x2f0 net/ipv6/ipv6_sockglue.c:1386
 [<ffffffff8336ad65>] compat_udpv6_getsockopt+0x45/0x80 net/ipv6/udp.c:1464
 [<ffffffff82df1c32>] compat_sock_common_getsockopt+0xb2/0x140 net/core/sock.c:2629
 [<ffffffff82ed92ef>] C_SYSC_getsockopt net/compat.c:504 [inline]
 [<ffffffff82ed92ef>] compat_SyS_getsockopt+0x14f/0x2a0 net/compat.c:487
 [<ffffffff81006d91>] do_syscall_32_irqs_on arch/x86/entry/common.c:392 [inline]
 [<ffffffff81006d91>] do_fast_syscall_32+0x321/0x8a0 arch/x86/entry/common.c:459
 [<ffffffff837743ea>] sysenter_flags_fixed+0xd/0x17
1 lock held by syz-executor7/5335:
 #0:  (sk_lock-AF_INET6){+.+.+.}, at: [<ffffffff8335981f>] lock_sock include/net/sock.h:1493 [inline]
 #0:  (sk_lock-AF_INET6){+.+.+.}, at: [<ffffffff8335981f>] compat_ipv6_getsockopt+0x1df/0x2f0 net/ipv6/ipv6_sockglue.c:1385
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.118-g239a415 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffffffff84217840 task.stack: ffffffff84200000
RIP: 0010:[<ffffffff810c341c>]  [<ffffffff810c341c>] native_apic_mem_write+0xc/0x10 arch/x86/include/asm/apic.h:94
RSP: 0018:ffffffff84207c38  EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff8426f420 RCX: 0000000000000020
RDX: 1ffffffff084dea1 RSI: 0000000000096f3d RDI: 0000000000000380
RBP: ffffffff84207c38 R08: ffff88021fffd018 R09: 0000000000000006
R10: ffffed0043fffa01 R11: 0000000000000000 R12: 0000000000096f3d
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc3202b000 CR3: 00000000b5742000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff84207c58 ffffffff810b07fa 0000000000000000 ffff8801db217fc0
 ffffffff84207c98 ffffffff812cfd9a 0000003829d51900 ffff8801db217fc0
 0000000000000001 0000003829d51900 ffff8801db2196b8 0000000000000000
Call Trace:
 [<ffffffff810b07fa>] apic_write arch/x86/include/asm/apic.h:392 [inline]
 [<ffffffff810b07fa>] lapic_next_event+0x5a/0x90 arch/x86/kernel/apic/apic.c:458
 [<ffffffff812cfd9a>] clockevents_program_event+0x28a/0x350 kernel/time/clockevents.c:339
 [<ffffffff812d4c28>] tick_program_event+0xa8/0x110 kernel/time/tick-oneshot.c:47
 [<ffffffff812af600>] hrtimer_reprogram kernel/time/hrtimer.c:663 [inline]
 [<ffffffff812af600>] hrtimer_start_range_ns+0x1040/0x1450 kernel/time/hrtimer.c:1024
 [<ffffffff812d58f7>] hrtimer_start_expires include/linux/hrtimer.h:407 [inline]
 [<ffffffff812d58f7>] tick_nohz_restart+0x137/0x190 kernel/time/tick-sched.c:566
 [<ffffffff812d7837>] tick_nohz_restart_sched_tick kernel/time/tick-sched.c:726 [inline]
 [<ffffffff812d7837>] tick_nohz_idle_exit+0x247/0x3d0 kernel/time/tick-sched.c:946
 [<ffffffff81221815>] cpu_idle_loop kernel/sched/idle.c:267 [inline]
 [<ffffffff81221815>] cpu_startup_entry+0x2a5/0x8f0 kernel/sched/idle.c:301
 [<ffffffff8375f9a9>] rest_init+0x189/0x190 init/main.c:410
 [<ffffffff84822811>] start_kernel+0x6b9/0x6ee init/main.c:682
 [<ffffffff84821312>] x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:196
 [<ffffffff84821454>] x86_64_start_kernel+0x140/0x163 arch/x86/kernel/head64.c:185
Code: a0 06 00 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 be 01 00 00 00 48 89 e5 e8 e2 d1 1b 00 5d c3 55 89 ff 48 89 e5 89 b7 00 b0 5f ff <5d> c3 66 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 89 fb 
NMI backtrace for cpu 1
CPU: 1 PID: 486 Comm: khungtaskd Not tainted 4.4.118-g239a415 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bb0cc800 task.stack: ffff8800bb320000
RIP: 0010:[<ffffffff810c3e67>]  [<ffffffff810c3e67>] native_apic_mem_write arch/x86/include/asm/apic.h:94 [inline]
RIP: 0010:[<ffffffff810c3e67>]  [<ffffffff810c3e67>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810c3e67>]  [<ffffffff810c3e67>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810c3e67>]  [<ffffffff810c3e67>] flat_send_IPI_mask+0xf7/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800bb327cb8  EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300
RBP: ffff8800bb327ce0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000003 R14: ffffffff8426f420 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3c3ad689b8 CR3: 00000000b5742000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8426f420 ffffffff847ef9c0 fffffbfff08fd9ec dffffc0000000000
 ffff8801db31bca0 ffff8800bb327d00 ffffffff810b999b ffffffff839f63c0
 0000000000000003 ffff8800bb327d60 ffffffff81d0ef94 ffffffff8141b013
Call Trace:
 [<ffffffff810b999b>] nmi_raise_cpu_backtrace+0x5b/0x70 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81d0ef94>] nmi_trigger_all_cpu_backtrace+0x4a4/0x550 lib/nmi_backtrace.c:85
 [<ffffffff810b9a34>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff81368c5a>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff81368c5a>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81368c5a>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81368c5a>] watchdog+0x6fa/0xae0 kernel/hung_task.c:238
 [<ffffffff81190788>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83772e85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:506
Code: b3 5f ff f6 c4 10 75 e1 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 74 1a e8 6b 2f 17 00 4c 89 e7 57 9d 0f 1f