IPVS: Creating netns size=2536 id=49
INFO: task syz-executor1:14537 blocked for more than 120 seconds.
      Not tainted 4.9.111-g03c70fe #9
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1   D28912 14537   3853 0x20020004
 ffff8801d785b000 ffff8801d7175f80 ffff8801bf3aaa00 ffff8801d785c800
 ffff8801db321c18 ffff8801a1e1f840 ffffffff839e7ded 1ffff100343c3efc
 ffffffff85542200 0000000041b58ab3 00ffffff843c3108 ffff8801db3224e8
Call Trace:
 [<ffffffff839e93ef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839f5801>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff839e75ca>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5180
 [<ffffffff839ead23>] do_wait_for_common kernel/sched/completion.c:75 [inline]
 [<ffffffff839ead23>] __wait_for_common kernel/sched/completion.c:93 [inline]
 [<ffffffff839ead23>] wait_for_common_io kernel/sched/completion.c:107 [inline]
 [<ffffffff839ead23>] wait_for_completion_io+0x203/0x2e0 kernel/sched/completion.c:155
 [<ffffffff81df9ec2>] submit_bio_wait+0x112/0x180 block/bio.c:885
 [<ffffffff81e3fa75>] __blkdev_issue_zeroout block/blk-lib.c:239 [inline]
 [<ffffffff81e3fa75>] blkdev_issue_zeroout+0x3a5/0x490 block/blk-lib.c:281
 [<ffffffff81e5712a>] blk_ioctl_zeroout block/ioctl.c:254 [inline]
 [<ffffffff81e5712a>] blkdev_ioctl+0x15ba/0x1a70 block/ioctl.c:521
 [<ffffffff81ea45d5>] compat_blkdev_ioctl+0xaa5/0x3ad0 block/compat_ioctl.c:700
 [<ffffffff8168eb56>] C_SYSC_ioctl fs/compat_ioctl.c:1602 [inline]
 [<ffffffff8168eb56>] compat_SyS_ioctl+0x126/0x1fe0 fs/compat_ioctl.c:1549
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839fa3d0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

Showing all locks held in the system:
2 locks held by khungtaskd/519:
 #0:  (rcu_read_lock){......}, at: [<ffffffff813666fc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff813666fc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81425d87>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/3676:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d810c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/3773:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f6e92>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8211e602>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133

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

NMI backtrace for cpu 0
CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.111-g03c70fe #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d8527d08 ffffffff81eb2729 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810b9af0 ffff8801d8527d40
 ffffffff81ebda27 0000000000000000 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81eb2729>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb2729>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebda27>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebd9ba>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b9bf4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81366c94>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81366c94>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81366c94>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81366c94>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119d05d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f8e9c>] 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 skipped: idling at pc 0xffffffff839f78f6