device lo left promiscuous mode
device lo entered promiscuous mode
device lo left promiscuous mode
device lo entered promiscuous mode
INFO: task syz-executor5:13204 blocked for more than 140 seconds.
      Not tainted 4.9.113-g47bbcd6 #10
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor5   D26360 13204   3885 0x00000004
 ffff8801c2cb9800 0000000000000000 ffff8801b9dc8fc0 ffff8801d9a6b000
 ffff8801db321c18 ffff88019a827ac8 ffffffff839e909d ffffffff81235647
 0000000000000000 ffff8801c2cba0c0 0000000600000007 ffff8801db3224e8
Call Trace:
 [<ffffffff839ea69f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff839f5cd8>] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline]
 [<ffffffff839f5cd8>] 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
 [<ffffffff8122c270>] __down_write arch/x86/include/asm/rwsem.h:125 [inline]
 [<ffffffff8122c270>] down_write_nested+0x60/0xa0 kernel/locking/rwsem.c:174
 [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 [<ffffffff815ac49b>] user_path_create fs/namei.c:3697 [inline]
 [<ffffffff815ac49b>] SYSC_mkdirat fs/namei.c:3841 [inline]
 [<ffffffff815ac49b>] SyS_mkdirat+0xbb/0x260 fs/namei.c:3833
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9f93>] 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 getty/3779:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f8142>] 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-executor5/13204:
 #0:  (sb_writers#10){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#10){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#4/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#4/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639

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

NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.113-g47bbcd6 #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d8537d08 ffffffff81eb32a9 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b9bd0 ffff8801d8537d40
 ffffffff81ebe5a7 0000000000000001 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
 [<ffffffff839fa15c>] 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
CPU: 0 PID: 13135 Comm: syz-executor5 Not tainted 4.9.113-g47bbcd6 #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88019d674800 task.stack: ffff8801c3f78000
RIP: 0010:[<ffffffff812301bd>] 
c [<ffffffff812301bd>] __lock_is_held+0x3d/0xf0 kernel/locking/lockdep.c:3594
RSP: 0018:ffff8801c3f7f820  EFLAGS: 00000806
RAX: 0000000000000000 RBX: ffff88019d674800 RCX: ffffc90006ed8000
RDX: 1ffff10033acea18 RSI: ffffffff846def60 RDI: ffffffff846def20
RBP: ffff8801c3f7f850 R08: ffff88019d675138 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88019d674800
R13: ffffffff846def20 R14: ffffffff846def20 R15: ffff8801d53e8030
FS:  00007f39da9df700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a367cf000 CR3: 00000001cd81b000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff88019d6750c0
c 0000000000000246
c ffff88019d674800
c ffffffff846def20
c
 00000000000001cc
c ffff8801d53e8030
c ffff8801c3f7f878
c ffffffff81230a54
c
 ffff88019d674800
c 0000000000000000
c ffffffff83db4480
c ffff8801c3f7f8b0
c
Call Trace:
 [<ffffffff81230a54>] lock_is_held+0xb4/0x140 kernel/locking/lockdep.c:3794
 [<ffffffff811bb557>] ___might_sleep+0x1c7/0x260 kernel/sched/core.c:7954
 [<ffffffff811bb685>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7945
 [<ffffffff81907ab4>] request_wait_answer+0x124/0x6e0 fs/fuse/dev.c:459
 [<ffffffff819086c9>] __fuse_request_send+0x109/0x1b0 fs/fuse/dev.c:480
 [<ffffffff819087cd>] fuse_request_send+0x5d/0x70 fs/fuse/dev.c:493
 [<ffffffff81912a24>] fuse_simple_request+0x2f4/0x660 fs/fuse/dev.c:551
 [<ffffffff8191adc3>] fuse_lookup_name+0x253/0x5d0 fs/fuse/dir.c:369
 [<ffffffff8191b22d>] fuse_lookup+0xed/0x3a0 fs/fuse/dir.c:406
 [<ffffffff81593e4c>] lookup_real fs/namei.c:1522 [inline]
 [<ffffffff81593e4c>] __lookup_hash+0x11c/0x190 fs/namei.c:1542
 [<ffffffff815aa046>] filename_create+0x1a6/0x490 fs/namei.c:3640
 [<ffffffff815ac49b>] user_path_create fs/namei.c:3697 [inline]
 [<ffffffff815ac49b>] SYSC_mkdirat fs/namei.c:3841 [inline]
 [<ffffffff815ac49b>] SyS_mkdirat+0xbb/0x260 fs/namei.c:3833
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9f93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c8b 
c1c 
c25 
cc0 
c7d 
c01 
c00 
c48 
c8d 
c83 
cc0 
c08 
c00 
c00 
c48 
c83 
cec 
c08 
c48 
c89 
cc2 
c48 
c89 
c45 
cd0 
c48 
cb8 
c00 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c48 
cc1 
cea 
c03 
c0f 
cb6 
c04 
c02 
c<84> 
cc0 
c74 
c08 
c3c 
c03 
c0f 
c8e 
c82 
c00 
c00 
c00 
c4c 
c8b 
c65 
cd0 
c45 
c31 
cff 
c48 
cb8 
c