INFO: task syz.3.804:9169 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.804       state:D stack:25720 pid:9169  tgid:9169  ppid:6736   task_flags:0x400040 flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 __fuse_simple_request+0x121f/0x1c60
 fuse_flush+0x66a/0x8a0
 filp_flush+0xbd/0x190
 filp_close+0x1d/0x40
 __se_sys_close_range+0x372/0x670
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb46f79acb9
RSP: 002b:00007fff40dd0948 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007fff40dd0a30 RCX: 00007fb46f79acb9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000000387b0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b30a20000 R11: 0000000000000246 R12: 00007fff40dd0a70
R13: 00007fb46fa15fac R14: 0000000000038873 R15: 00007fb46fa15fa0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e35a360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5662:
 #0: ffff8881740d10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
4 locks held by udevd/9898:
2 locks held by syz.5.1601/13220:
2 locks held by syz.6.1602/13239:
1 lock held by kworker/R-xfs-r/13245:
 #0: ffff88812103a918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13239 Comm: syz.6.1602 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20
Code: b6 e3 78 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 1f 00 fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 c6 e2 78 0a e9 41 06 00 00 90 <f3> 0f 1e fa 0f 1f 00 fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc90004887698 EFLAGS: 00000093
RAX: ffffffff81a209f5 RBX: ffffffff81a2086f RCX: ffff888120193a80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e34c760
RBP: ffffc90004887770 R08: ffffffff8fcef877 R09: 1ffffffff1f9df0e
R10: dffffc0000000000 R11: fffffbfff1f9df0f R12: 0000000000000000
R13: 0000000000000048 R14: 0000000000000200 R15: 1ffff92000910edc
FS:  00007f9173fee6c0(0000) GS:ffff88818e324000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4af0de0ad8 CR3: 0000000120368000 CR4: 00000000000006f0
Call Trace:
 <TASK>
RIP: 0010:vprintk_emit+0x45d/0x560
Code: 0f 84 44 ff ff ff e8 12 90 20 00 fb eb 44 e8 0a 90 20 00 e8 35 f5 d6 09 4d 85 f6 74 94 e8 fb 8f 20 00 fb 48 c7 c7 60 c7 34 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 0b 27
RSP: 0018:ffffc900048876c0 EFLAGS: 00000293
 _printk+0xdd/0x130
 xfs_printk_level+0x1ae/0x2c0
 xfs_log_mount+0xb6/0x3e0
 xfs_mountfs+0xe70/0x22e0
 xfs_fs_fill_super+0x11f1/0x1640
 get_tree_bdev_flags+0x431/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x329/0xa50
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f917319bf4a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9173fede58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9173fedee0 RCX: 00007f917319bf4a
RDX: 0000200000009700 RSI: 0000200000009740 RDI: 00007f9173fedea0
RBP: 0000200000009700 R08: 00007f9173fedee0 R09: 0000000002a00086
R10: 0000000002a00086 R11: 0000000000000246 R12: 0000200000009740
R13: 00007f9173fedea0 R14: 0000000000009759 R15: 0000200000009780
 </TASK>
