9pnet: Insufficient options for proto=fd
IPVS: length: 57 != 8
9pnet: Insufficient options for proto=fd
INFO: task syz-executor5:16283 blocked for more than 140 seconds.
      Not tainted 4.9.111-g03c70fe #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor5   D29088 16283   3832 0x00000004
 ffff8801bdf83000 0000000000000000 ffff8801cca4da40 ffff8801d9a6b000
 ffff8801db321c18 ffff8801af9ff978 ffffffff839e7ded ffffffff81235607
 0000000000000000 ffff8801bdf838c0 0000000600000007 ffff8801db3224e8
Call Trace:
 [<ffffffff839e93ef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839f4a28>] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline]
 [<ffffffff839f4a28>] rwsem_down_write_failed+0x598/0x990 kernel/locking/rwsem-xadd.c:555
 [<ffffffff81ee6a07>] call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 [<ffffffff839f27fc>] __down_write arch/x86/include/asm/rwsem.h:125 [inline]
 [<ffffffff839f27fc>] down_write+0x5c/0xa0 kernel/locking/rwsem.c:54
 [<ffffffff8161b851>] inode_lock include/linux/fs.h:766 [inline]
 [<ffffffff8161b851>] utimes_common.isra.1+0x2d1/0x5e0 fs/utimes.c:93
 [<ffffffff8161bcfe>] do_utimes+0x19e/0x2c0 fs/utimes.c:159
 [<ffffffff8161c3bd>] SYSC_futimesat fs/utimes.c:214 [inline]
 [<ffffffff8161c3bd>] SyS_futimesat fs/utimes.c:189 [inline]
 [<ffffffff8161c3bd>] SYSC_utimes fs/utimes.c:220 [inline]
 [<ffffffff8161c3bd>] SyS_utimes+0x13d/0x1b0 fs/utimes.c:217
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f8cd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

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
2 locks held by rs:main Q:Reg/3610:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d810c>] __fdget_pos+0xac/0xd0 fs/file.c:781
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff81572c4e>] file_start_write include/linux/fs.h:2640 [inline]
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff81572c4e>] vfs_write+0x3ae/0x530 fs/read_write.c:556
1 lock held by rsyslogd/3612:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d810c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/3708:
 #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
2 locks held by syz-executor5/16192:
 #0:  (sb_writers#18){.+.+.+}, at: [<ffffffff815e09af>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#18){.+.+.+}, at: [<ffffffff815e09af>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&sb->s_type->i_mutex_key#24){++++++}, at: [<ffffffff8161b851>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#24){++++++}, at: [<ffffffff8161b851>] utimes_common.isra.1+0x2d1/0x5e0 fs/utimes.c:93
2 locks held by syz-executor5/16283:
 #0:  (sb_writers#18){.+.+.+}, at: [<ffffffff815e09af>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#18){.+.+.+}, at: [<ffffffff815e09af>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&sb->s_type->i_mutex_key#24){++++++}, at: [<ffffffff8161b851>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#24){++++++}, at: [<ffffffff8161b851>] utimes_common.isra.1+0x2d1/0x5e0 fs/utimes.c:93

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

NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.111-g03c70fe #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d861fd08 ffffffff81eb2729 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b9af0 ffff8801d861fd40
 ffffffff81ebda27 0000000000000001 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 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f78f6