INFO: task syz-executor:7313 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22464 pid:7313  tgid:7313  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1585/0x5340
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 lmLogClose+0xb4/0x520
 jfs_umount+0x2ef/0x3c0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x13d/0x2d0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9caa99d9d7
RSP: 002b:00007ffcfd4fcc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f9caaa31f90 RCX: 00007f9caa99d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcfd4fcd20
RBP: 00007ffcfd4fcd20 R08: 00007ffcfd4fdd20 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcfd4fddb0
R13: 00007f9caaa31f90 R14: 000000000002060c R15: 00007ffcfd4fddf0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5633:
 #0: ffff8881773f60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
2 locks held by syz-executor/5921:
 #0: ffff88811f0a60e0 (&type->s_umount_key#64){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8ebed8c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/7313:
 #0: ffff8881a09500e0 (&type->s_umount_key#64){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8ebed8c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/9135:
 #0: ffff88811fdc00e0 (&type->s_umount_key#64){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8ebed8c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.3.345/10986:
 #0: ffff88811f0a60e0 (&type->s_umount_key#64){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz.4.359/11602:
 #0: ffff8881687f60e0 (&type->s_umount_key#63/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0
 #1: ffffffff8ebed8c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogOpen+0x1a1/0xfa0
2 locks held by syz.6.369/12497:
 #0: ffff8881709080e0 (&type->s_umount_key#63/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0
 #1: ffffffff8ebed8c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogOpen+0x1a1/0xfa0
2 locks held by syz-executor/13899:
 #0: ffff88816b5380e0 (&type->s_umount_key#64){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8ebed8c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.8.440/14240:
 #0: ffff88811f0a60e0 (&type->s_umount_key#64){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.443/14715:
 #0: ffff88811fdc00e0 (&type->s_umount_key#64){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.443/14716:
 #0: ffff88811fdc00e0 (&type->s_umount_key#64){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz-executor/15594:
1 lock held by syz.3.578/17038:
 #0: ffff88811f0a60e0 (&type->s_umount_key#64){++++}-{4:4}, at: super_lock+0x2d6/0x3d0

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

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+0xfd9/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 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: 15594 Comm: syz-executor 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: 0033:0x7f5a80451d33
Code: 25 00 f0 00 00 3d 00 40 00 00 75 0e e9 06 02 00 00 66 0f 1f 44 00 00 83 c3 01 48 89 ef e8 55 9b 14 00 85 c0 0f 84 4d ff ff ff <e8> 88 9c 0d 00 49 89 c6 8b 00 83 f8 01 0f 84 aa 00 00 00 83 f8 1e
RSP: 002b:00007ffe1da80bc0 EFLAGS: 00000286
RAX: 00000000ffffffff RBX: 0000000000006e63 RCX: 00007f5a8059b887
RDX: ffffffffffffffe8 RSI: 0000000000000000 RDI: 00007ffe1da80c70
RBP: 00007ffe1da80c70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffe1da81d00
R13: 00007f5a80631f90 R14: 00005555748d24e8 R15: 0000000000000005
FS:  00005555748d2500 GS:  0000000000000000
