INFO: task syz-executor3:12646 blocked for more than 140 seconds.
      Not tainted 4.9.128+ #93
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3   D29688 12646   2093 0x00000004
 ffff8801d2d4df00 ffff8801aab41600 ffff8801cb47a100 ffff8801b0648000
 ffff8801db721018 ffff8801a8cefad8 ffffffff8277ee02 ffffffff811ff5f0
 ffff8801d2d4df00 ffffffff810ecbba 00fffc0000000000 ffff8801db7218f0
Call Trace:
 [<ffffffff8278032f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff82231cac>] __lock_sock+0x13c/0x250 net/core/sock.c:2035
 [<ffffffff82231eb6>] lock_sock_nested+0xf6/0x120 net/core/sock.c:2505
 [<ffffffff8274a0ac>] lock_sock include/net/sock.h:1404 [inline]
 [<ffffffff8274a0ac>] packet_setsockopt+0x5ec/0x2430 net/packet/af_packet.c:3777
 [<ffffffff82229a26>] SYSC_setsockopt net/socket.c:1785 [inline]
 [<ffffffff82229a26>] SyS_setsockopt+0x166/0x260 net/socket.c:1764
 [<ffffffff8100554f>] do_syscall_64+0x19f/0x480 arch/x86/entry/common.c:282
 [<ffffffff8278df13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8130a0ac>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8130a0ac>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813e71ec>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/2022:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff8278bfd2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81cdee72>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.128+ #93
 ffff8801d9907d08 ffffffff81af2469 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810967d0 ffff8801d9907d40
 ffffffff81afd1c9 0000000000000000 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81af2469>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81af2469>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81afd1c9>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81afd15c>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff810968d4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8130a63d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8130a63d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8130a63d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8130a63d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff8113e00d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8278e0dc>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7350 Comm: syz-executor5 Not tainted 4.9.128+ #93
task: ffff8801a60117c0 task.stack: ffff8801d8260000
RIP: 0010:[<ffffffff8130c744>] 
c [<ffffffff8130c744>] __seccomp_filter+0x1c4/0xc80 kernel/seccomp.c:579
RSP: 0018:ffff8801d8267cb8  EFLAGS: 00000286
RAX: 00000000ffffffff RBX: fffffffffffff001 RCX: 0000000000000001
RDX: ffffed003b04cf9f RSI: ffffffff8130c72a RDI: ffffffff84010440
RBP: ffff8801d8267dc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000050000
R13: 00000000ffffffff R14: dffffc0000000000 R15: ffff8801d8267e48
FS:  00007fa123d1d700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4886c76000 CR3: 00000001c9f4a000 CR4: 00000000001606b0
Stack:
 0000000000000000
c 0000000000000000
c ffff8801a6012068
c ffff8801a6012068
c
 ffff8801a60117c0
c ffffffff8278d677
c 000000ca00000000
c 1ffff1003b04cf9f
c
 0000000041b58ab3
c ffffffff82c2dc17
c ffffffff8130c580
c ffff8801db721000
c
Call Trace:
 [<ffffffff8130ebc6>] __secure_computing+0xa6/0x290 kernel/seccomp.c:692
 [<ffffffff81004940>] syscall_trace_enter+0x550/0xd20 arch/x86/entry/common.c:117
 [<ffffffff8100566c>] do_syscall_64+0x2bc/0x480 arch/x86/entry/common.c:273
 [<ffffffff8278df13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c00 
cff 
c7f 
c0f 
c85 
ca9 
c0a 
c00 
c00 
c45 
c31 
ced 
ce8 
c16 
cd3 
cff 
cff 
c44 
c89 
ce8 
c48 
cba 
c00 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c48 
c03 
c95 
c30 
cff 
cff 
cff 
cc7 
c02 
c00 
c00 
c00 
c00 
c<c7> 
c42 
c0c 
c00 
c00 
c00 
c00 
c48 
c8b 
c4d 
cd0 
c65 
c48 
c33 
c0c 
c25 
c28 
c00 
c00 
c00 
c0f 
c