INFO: task syz-executor:6665 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:21832 pid:6665  tgid:6665  ppid:1      task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 lmLogClose+0xb4/0x520
 jfs_umount+0x2ef/0x3c0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x135/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fddce18fed7
RSP: 002b:00007ffebe264ed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fddce211c05 RCX: 00007fddce18fed7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffebe264f90
RBP: 00007ffebe264f90 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffebe266020
R13: 00007fddce211c05 R14: 000000000001a01e R15: 00007ffebe266060
 </TASK>
INFO: task syz-executor:6888 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:21800 pid:6888  tgid:6888  ppid:1      task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 lmLogClose+0xb4/0x520
 jfs_umount+0x2ef/0x3c0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x135/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3202b8fed7
RSP: 002b:00007ffca7b223f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3202c11c05 RCX: 00007f3202b8fed7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffca7b224b0
RBP: 00007ffca7b224b0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffca7b23540
R13: 00007f3202c11c05 R14: 000000000001d18f R15: 00007ffca7b23580
 </TASK>
INFO: task syz.2.225:7998 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.225       state:D stack:25128 pid:7998  tgid:7997  ppid:7786   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff84a98eba9
RSP: 002b:00007ff84b8c5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007ff84abd5fa0 RCX: 00007ff84a98eba9
RDX: 0000000000000000 RSI: 0000200000002540 RDI: ffffffff80000801
RBP: 00007ff84aa11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000140 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff84abd6038 R14: 00007ff84abd5fa0 R15: 00007fff8d4cf9d8
 </TASK>
INFO: task syz.9.231:8035 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.231       state:D stack:25032 pid:8035  tgid:8034  ppid:7777   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd1b98eba9
RSP: 002b:00007fcd1c899038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fcd1bbd5fa0 RCX: 00007fcd1b98eba9
RDX: 0000000000000000 RSI: 0000200000000480 RDI: ffffffff80000800
RBP: 00007fcd1ba11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000140 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd1bbd6038 R14: 00007fcd1bbd5fa0 R15: 00007ffee10696a8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5677:
 #0: ffff88801b6fa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by syz.5.42/6228:
 #0: ffff888107e9c0e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/6578:
 #0: ffff888107e9c0e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e56e9c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/6665:
 #0: ffff88803d1380e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e56e9c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/6888:
 #0: ffff88811fffe0e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e56e9c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.2.225/7998:
 #0: ffff88803d1380e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.9.231/8035:
 #0: ffff888107e9c0e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.1.244/8139:
 #0: ffff88811fffe0e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/8149:
 #0: ffff88803def00e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e56e9c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/8241:
 #0: ffff88812fc7c0e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e56e9c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/8899:
 #0: ffff88803f3fa0e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e56e9c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/8946:
 #0: ffff88803727a0e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e56e9c8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.5.623/10250:
 #0: ffff888107e9c0e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.2.630/10274:
 #0: ffff88803d1380e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x25c/0x3b0
1 lock held by syz.9.634/10283:
 #0: ffff888107e9c0e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x2a9/0x3b0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 12 Comm: kworker/u8:0 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
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_lock+0x3e/0x190
Code: 00 83 f9 01 bb 09 00 00 00 83 db 00 83 fa 08 0f 45 da bd 01 00 00 00 89 d9 d3 e5 25 ff 1f 00 00 48 0f a3 05 04 e6 0a 12 73 10 <48> 69 c0 c8 00 00 00 48 8d 88 10 73 49 93 eb 48 83 3d 6b 75 0e 18
RSP: 0018:ffffc900000f78b8 EFLAGS: 00000003
RAX: 0000000000000007 RBX: 0000000000000009 RCX: 0000000000000009
RDX: 0000000000000008 RSI: ffff88801c2f6180 RDI: ffff88801c2f5640
RBP: 0000000000000200 R08: 0000000000000000 R09: ffffffff8b47aca2
R10: dffffc0000000000 R11: ffffffff8b47abd0 R12: 00000000ffffff05
R13: 0000000000000001 R14: ffff88801c2f6180 R15: ffff88801c2f61a0
FS:  0000000000000000(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555744965c8 CR3: 000000010c4b8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __lock_acquire+0x6a8/0xd20
 lock_acquire+0x120/0x360
 batadv_nc_worker+0xef/0x610
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
