INFO: task syz-executor:5861 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:5861  tgid:5861  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb90
 __filemap_get_folio+0x139/0xaf0
 truncate_inode_pages_range+0x3ed/0xda0
 evict+0x517/0x9c0
 evict_inodes+0x64c/0x6d0
 generic_shutdown_super+0x9a/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: 0033:0x7f445a38ff57
RSP: 002b:00007ffd72b78f78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f445a411c2d RCX: 00007f445a38ff57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd72b79030
RBP: 00007ffd72b79030 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd72b7a0c0
R13: 00007f445a411c2d R14: 0000000000011e5a R15: 00007ffd72b7a100
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5675:
 #0: ffff888106f880a0 (&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-executor/5861:
 #0: ffff88810849a0e0 (&type->s_umount_key#86){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
2 locks held by syz-executor/9146:
 #0: ffff88811a42c0e0 (&type->s_umount_key#53){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e13fb78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
1 lock held by syz.1.939/10361:
 #0: ffff88810849a0e0 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.1.939/10365:
 #0: ffff88810849a0e0 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x25c/0x3b0
3 locks held by syz.2.1024/10715:
 #0: ffff88811d780920 (&c->sb_lock){+.+.}-{4:4}, at: bch2_fs_open+0x11e5/0x2600
 #1: ffff88811d7849d8 (&c->mark_lock){++++}-{0:0}, at: bch2_sb_replicas_to_cpu_replicas+0x117/0x1a0
 #2: ffffffff8e13fb78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730

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

NMI backtrace for cpu 0
CPU: 0 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+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10715 Comm: syz.2.1024 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:check_preemption_disabled+0x17/0x120
Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 48 83 ec 10 65 48 8b 05 be 5e 26 07 48 89 44 24 08 <65> 8b 05 c6 5e 26 07 65 8b 0d bb 5e 26 07 f7 c1 ff ff ff 7f 74 23
RSP: 0018:ffffc90003bf6ce0 EFLAGS: 00000082
RAX: 10b5448dbc6e2800 RBX: 0000000000000000 RCX: 10b5448dbc6e2800
RDX: 0000000000000000 RSI: ffffffff8d9cdeec RDI: ffffffff8be33f80
RBP: ffffffff8172c195 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90003bf6ed8 R11: ffffffff81ac3b00 R12: 0000000000000002
R13: ffffffff8e13a0e0 R14: 0000000000000000 R15: 0000000000000246
FS:  00007f97439a86c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055eec17c4000 CR3: 000000002b3dc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0xe7/0x360
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 alloc_unbound_pwq+0xac8/0xe00
 apply_wqattrs_prepare+0x5ff/0xe00
 apply_workqueue_attrs_locked+0x65/0x240
 __alloc_workqueue+0xf90/0x1b70
 alloc_workqueue_noprof+0xd4/0x210
 bch2_fs_btree_interior_update_init+0x34/0x120
 bch2_fs_init_rw+0x1b9/0x2d0
 bch2_fs_open+0x2338/0x2600
 bch2_fs_get_tree+0x44f/0x1520
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x2a2/0x9e0
 __se_sys_mount+0x317/0x410
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9742b903ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f97439a7e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f97439a7ef0 RCX: 00007f9742b903ca
RDX: 00002000000000c0 RSI: 00002000000003c0 RDI: 00007f97439a7eb0
RBP: 00002000000000c0 R08: 00007f97439a7ef0 R09: 0000000000000810
R10: 0000000000000810 R11: 0000000000000246 R12: 00002000000003c0
R13: 00007f97439a7eb0 R14: 0000000000005aa3 R15: 0000200000000040
 </TASK>
