netlink: 8 bytes leftover after parsing attributes in process `syz-executor6'.
INFO: task syz-executor2:22268 blocked for more than 140 seconds.
      Not tainted 4.9.113-g9905591 #14
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D30008 22268   3883 0x00000004
 ffff8801b638c800 ffff88019e3faa00 ffff8801be600a80 ffff8801c5d10000
 ffff8801db221c18 ffff8801b80d7a78 ffffffff839e929d ffffffff81235647
 0000000000000000 ffff8801b638d0c0 0000000600000007 ffff8801db2224e8
Call Trace:
 [<ffffffff839ea89f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff839f5ed8>] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline]
 [<ffffffff839f5ed8>] rwsem_down_write_failed+0x598/0x990 kernel/locking/rwsem-xadd.c:555
 [<ffffffff81ee7587>] call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 [<ffffffff839f3cac>] __down_write arch/x86/include/asm/rwsem.h:125 [inline]
 [<ffffffff839f3cac>] down_write+0x5c/0xa0 kernel/locking/rwsem.c:54
 [<ffffffff815693bb>] inode_lock include/linux/fs.h:766 [inline]
 [<ffffffff815693bb>] chown_common+0x2bb/0x550 fs/open.c:626
 [<ffffffff8156d168>] SYSC_fchownat fs/open.c:659 [inline]
 [<ffffffff8156d168>] SyS_fchownat fs/open.c:639 [inline]
 [<ffffffff8156d168>] SYSC_lchown fs/open.c:678 [inline]
 [<ffffffff8156d168>] SyS_lchown+0xd8/0x160 fs/open.c:676
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839fa193>] 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: [<ffffffff8136675c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136675c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.?..}, at: [<ffffffff81425de7>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by rs:main Q:Reg/3676:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d81ec>] __fdget_pos+0xac/0xd0 fs/file.c:781
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff81572cce>] file_start_write include/linux/fs.h:2640 [inline]
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff81572cce>] vfs_write+0x3ae/0x530 fs/read_write.c:556
1 lock held by rsyslogd/3678:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d81ec>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/3774:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f8342>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8211ee22>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
2 locks held by syz-executor2/22192:
 #0:  (sb_writers#17){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#17){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&sb->s_type->i_mutex_key#22){++++++}, at: [<ffffffff815693bb>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#22){++++++}, at: [<ffffffff815693bb>] chown_common+0x2bb/0x550 fs/open.c:626
2 locks held by syz-executor2/22268:
 #0:  (sb_writers#17){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#17){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&sb->s_type->i_mutex_key#22){++++++}, at: [<ffffffff815693bb>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#22){++++++}, at: [<ffffffff815693bb>] chown_common+0x2bb/0x550 fs/open.c:626

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

NMI backtrace for cpu 0
CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.113-g9905591 #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d922fd08 ffffffff81eb32a9 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d922fd40
 ffffffff81ebe5a7 0000000000000000 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb32a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb32a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebe5a7>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebe53a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b9cd4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81366cf4>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81366cf4>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81366cf4>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81366cf4>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119d0ad>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839fa35c>] 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: 0 Comm: swapper/1 Not tainted 4.9.113-g9905591 #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9a6b000 task.stack: ffff8801d9a80000
RIP: 0010:[<ffffffff839fab10>] 
c [<ffffffff839fab10>] retint_kernel+0x14/0x2d
RSP: 0018:ffff8801db307e98  EFLAGS: 00000082
RAX: 0000000000000007 RBX: ffff8801d9a6b000 RCX: 1ffffffff0886881
RDX: 0000000000000000 RSI: ffffffff81f1ad0b RDI: ffff8801d9a6b894
RBP: ffff8801db307fb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff84c5ec88 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002023000 CR3: 00000001d82db000 CR4: 00000000001606f0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 0000000000000000
c ffffffff84c5ec88
c 0000000000000001
c 0000000000000000
c
 ffff8801db307fb0
c ffff8801d9a6b000
c 0000000000000000
c 0000000000000000
c
 0000000000000000
c 0000000000000000
c 0000000000000007
c 0000000000000000
c
Call Trace:
 [<ffffffff8114b287>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff8114b287>] irq_exit+0x147/0x190 kernel/softirq.c:405
 [<ffffffff839ff961>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff839ff961>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff839fbaf0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> 
d [<ffffffff839f8da6>] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53
 [<ffffffff839f83e5>] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline]
 [<ffffffff839f83e5>] default_idle+0x55/0x360 arch/x86/kernel/process.c:437
 [<ffffffff8106ae00>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:428
 [<ffffffff839f9205>] default_idle_call+0x45/0x60 kernel/sched/idle.c:97
 [<ffffffff812231d5>] cpuidle_idle_call kernel/sched/idle.c:155 [inline]
 [<ffffffff812231d5>] cpu_idle_loop kernel/sched/idle.c:248 [inline]
 [<ffffffff812231d5>] cpu_startup_entry+0x2b5/0x380 kernel/sched/idle.c:303
 [<ffffffff810aefa8>] start_secondary+0x328/0x400 arch/x86/kernel/smpboot.c:257
Code: 
c00 
c78 
c08 
c65 
c88 
c04 
c25 
ccf 
c83 
c01 
c00 
c0f 
c22 
cd8 
c58 
c0f 
c01 
cf8 
c0f 
c1f 
c00 
ceb 
c2d 
c0f 
cba 
ca4 
c24 
c90 
c00 
c00 
c00 
c09 
c73 
c12 
c65 
c83 
c3c 
c25 
c50 
c7d 
c01 
c00 
c00 
c<75> 
c07 
ce8 
c19 
c07 
cff 
cff 
ceb 
cee 
c0f 
cba 
ca4 
c24 
c90 
c00 
c00 
c00 
c09 
c73 
c05 
ce8 
c