reason=80000021 qualification=0000000000000000
IDTVectoring: info=00000000 errcode=00000000
TSC Offset = 0xffffff61e7fe5b5f
EPT pointer = 0x00000001aeddb01e
kworker/dying (285) used greatest stack depth: 14488 bytes left
INFO: task syz-executor0:22175 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc7+ #176
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D22024 22175   4460 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ec0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xaa/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:715 [inline]
 vfs_setxattr+0x96/0x100 fs/xattr.c:219
 setxattr+0x2ea/0x450 fs/xattr.c:451
 path_setxattr+0x1e3/0x230 fs/xattr.c:470
 __do_sys_setxattr fs/xattr.c:485 [inline]
 __se_sys_setxattr fs/xattr.c:481 [inline]
 __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:481
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456b29
Code: 42 08 84 00 48 83 c0 58 48 89 04 24 e8 00 8b fb ff 48 8b 6c 24 08 48 83 c4 10 c3 e8 91 33 00 00 eb bf cc cc cc cc cc cc cc cc <cc> cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 2b 
RSP: 002b:00007f5abc3fdc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f5abc3fe6d4 RCX: 0000000000456b29
RDX: 0000000020000340 RSI: 0000000020000380 RDI: 0000000020000140
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000ffdc R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4f70 R14: 00000000004c2d68 R15: 0000000000000000
INFO: task syz-executor0:22179 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc7+ #176
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D23888 22179   4460 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ec0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xaa/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:715 [inline]
 fuse_reverse_inval_entry+0xae/0x6d0 fs/fuse/dir.c:969
 fuse_notify_inval_entry fs/fuse/dev.c:1491 [inline]
 fuse_notify fs/fuse/dev.c:1764 [inline]
 fuse_dev_do_write+0x2b97/0x3700 fs/fuse/dev.c:1848
 fuse_dev_write+0x19a/0x240 fs/fuse/dev.c:1928
 call_write_iter include/linux/fs.h:1793 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6c6/0x9f0 fs/read_write.c:487
 vfs_write+0x1f8/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456b29
Code: 42 08 84 00 48 83 c0 58 48 89 04 24 e8 00 8b fb ff 48 8b 6c 24 08 48 83 c4 10 c3 e8 91 33 00 00 eb bf cc cc cc cc cc cc cc cc <cc> cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 2b 
RSP: 002b:00007f5abc3dcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5abc3dd6d4 RCX: 0000000000456b29
RDX: 0000000000000028 RSI: 0000000020000180 RDI: 0000000000000014
RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d6398 R14: 00000000004c998c R15: 0000000000000001
INFO: task syz-executor0:22185 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc7+ #176
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D25032 22185   4460 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ec0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 request_wait_answer+0x4c8/0x920 fs/fuse/dev.c:463
 __fuse_request_send+0x12a/0x1d0 fs/fuse/dev.c:483
 fuse_request_send+0x62/0xa0 fs/fuse/dev.c:496
 fuse_simple_request+0x33d/0x730 fs/fuse/dev.c:554
 fuse_setxattr+0x3df/0x650 fs/fuse/xattr.c:37
 fuse_xattr_set+0x3b/0x70 fs/fuse/xattr.c:192
 __vfs_setxattr+0x124/0x190 fs/xattr.c:150
 __vfs_setxattr_noperm+0x11d/0x410 fs/xattr.c:181
 vfs_setxattr+0xd8/0x100 fs/xattr.c:224
 setxattr+0x2ea/0x450 fs/xattr.c:451
 path_setxattr+0x1e3/0x230 fs/xattr.c:470
 __do_sys_setxattr fs/xattr.c:485 [inline]
 __se_sys_setxattr fs/xattr.c:481 [inline]
 __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:481
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456b29
Code: 42 08 84 00 48 83 c0 58 48 89 04 24 e8 00 8b fb ff 48 8b 6c 24 08 48 83 c4 10 c3 e8 91 33 00 00 eb bf cc cc cc cc cc cc cc cc <cc> cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 2b 
RSP: 002b:00007f5abc3bbc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f5abc3bc6d4 RCX: 0000000000456b29
RDX: 0000000020000240 RSI: 0000000020000100 RDI: 0000000020000080
RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000002b R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4f70 R14: 00000000004c2d68 R15: 0000000000000002
INFO: task syz-executor0:22193 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc7+ #176
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D25352 22193   4460 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ec0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xaa/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:715 [inline]
 vfs_setxattr+0x96/0x100 fs/xattr.c:219
 setxattr+0x2ea/0x450 fs/xattr.c:451
 path_setxattr+0x1e3/0x230 fs/xattr.c:470
 __do_sys_setxattr fs/xattr.c:485 [inline]
 __se_sys_setxattr fs/xattr.c:481 [inline]
 __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:481
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456b29
Code: 42 08 84 00 48 83 c0 58 48 89 04 24 e8 00 8b fb ff 48 8b 6c 24 08 48 83 c4 10 c3 e8 91 33 00 00 eb bf cc cc cc cc cc cc cc cc <cc> cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 2b 
RSP: 002b:00007f5abc39ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f5abc39b6d4 RCX: 0000000000456b29
RDX: 0000000020000240 RSI: 0000000020000100 RDI: 0000000020000080
RBP: 0000000000930280 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000002b R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4f70 R14: 00000000004c2d68 R15: 0000000000000003

Showing all locks held in the system:
1 lock held by khungtaskd/774:
 #0: 000000008192d9e6 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4461
1 lock held by rsyslogd/4322:
 #0: 0000000048e2a89a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766
2 locks held by login/4413:
 #0: 000000000fe1db08 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1: 0000000031d38f32 (&tty->atomic_write_lock){+.+.}, at: tty_write_lock+0x23/0x90 drivers/tty/tty_io.c:889
2 locks held by getty/4414:
 #0: 000000004222a35f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1: 00000000e1663c88 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4415:
 #0: 000000006eb3aa21 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1: 00000000bdba8fd3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4416:
 #0: 00000000abaaf1d9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1: 00000000292573a9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4417:
 #0: 00000000ba7c3876 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1: 0000000030eaee60 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4418:
 #0: 000000003f0ff209 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1: 000000004da24b6b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4419:
 #0: 000000008fd6d631 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1: 000000004dc7487d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by syz-executor0/22175:
 #0: 0000000016542972 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline]
 #0: 0000000016542972 (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386
 #1: 0000000098178f58 (&type->i_mutex_dir_key#5){++++}, at: inode_lock include/linux/fs.h:715 [inline]
 #1: 0000000098178f58 (&type->i_mutex_dir_key#5){++++}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:219
2 locks held by syz-executor0/22179:
 #0: 00000000f1f3f622 (&fc->killsb){++++}, at: fuse_notify_inval_entry fs/fuse/dev.c:1488 [inline]
 #0: 00000000f1f3f622 (&fc->killsb){++++}, at: fuse_notify fs/fuse/dev.c:1764 [inline]
 #0: 00000000f1f3f622 (&fc->killsb){++++}, at: fuse_dev_do_write+0x2b2d/0x3700 fs/fuse/dev.c:1848
 #1: 0000000098178f58 (&type->i_mutex_dir_key#5){++++}, at: inode_lock include/linux/fs.h:715 [inline]
 #1: 0000000098178f58 (&type->i_mutex_dir_key#5){++++}, at: fuse_reverse_inval_entry+0xae/0x6d0 fs/fuse/dir.c:969
2 locks held by syz-executor0/22185:
 #0: 0000000016542972 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline]
 #0: 0000000016542972 (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386
 #1: 0000000098178f58 (&type->i_mutex_dir_key#5){++++}, at: inode_lock include/linux/fs.h:715 [inline]
 #1: 0000000098178f58 (&type->i_mutex_dir_key#5){++++}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:219
2 locks held by syz-executor0/22193:
 #0: 0000000016542972 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline]
 #0: 0000000016542972 (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386
 #1: 0000000098178f58 (&type->i_mutex_dir_key#5){++++}, at: inode_lock include/linux/fs.h:715 [inline]
 #1: 0000000098178f58 (&type->i_mutex_dir_key#5){++++}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:219

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

NMI backtrace for cpu 1
CPU: 1 PID: 774 Comm: khungtaskd Not tainted 4.18.0-rc7+ #176
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline]
 watchdog+0x9c4/0xf80 kernel/hung_task.c:252
 kthread+0x345/0x410 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54