INFO: task syz-executor:15597 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:21480 pid:15597 tgid:15597 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: 0033:0x7fcffa38ff57
RSP: 002b:00007ffee63afe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fcffa411c2d RCX: 00007fcffa38ff57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffee63aff10
RBP: 00007ffee63aff10 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffee63b0fa0
R13: 00007fcffa411c2d R14: 00000000000627d7 R15: 00007ffee63b0fe0
 </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/5674:
 #0: ffff88810e1750a0 (&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
2 locks held by kworker/u8:2/5695:
 #0: ffff88804b039f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff88804b024008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
1 lock held by syz-executor/15597:
 #0: ffff8881117b40e0 (&type->s_umount_key#89){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.1.2410/17420:
 #0: ffff8881117b40e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/18614:
1 lock held by syz.6.2703/19158:
 #0: ffff8881117b40e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/19492:
 #0: ffff8881117740e0 (&type->s_umount_key#76){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e13fa40 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570
1 lock held by syz-executor/19513:
 #0: ffffffff8e13fb78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
2 locks held by syz.7.2871/20262:
3 locks held by dhcpcd-run-hook/20268:

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

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+0x439/0x7d0
 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: 20262 Comm: syz.7.2871 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+0x0/0x120
Code: c7 20 3f e3 8b 48 c7 c6 60 3f e3 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 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
RSP: 0018:ffffc9000479f820 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 27c3f360d1152b00
RDX: ffff88801f48d640 RSI: ffffffff8d9cdeec RDI: ffffffff8be33f80
RBP: 00000000ffffffff R08: 0000000000000000 R09: ffffffff81f6a17d
R10: ffffc9000479f940 R11: fffff520008f3f2b R12: 0000000000000246
R13: ffff88801f48d640 R14: ffffffff8e13a0e0 R15: 0000000000000eb1
FS:  00007f51c27646c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5ef68f1d0 CR3: 000000002aa10000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_is_held_type+0x79/0x190
 xas_load+0x1df/0x5b0
 filemap_get_entry+0x168/0x2f0
 shmem_get_folio_gfp+0x237/0x1660
 shmem_write_begin+0xf7/0x2b0
 generic_perform_write+0x2c5/0x900
 shmem_file_write_iter+0xf8/0x120
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f51c198d6df
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007f51c2763df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f51c198d6df
RDX: 0000000001000000 RSI: 00007f51b7600000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000060be
R10: 0000000000000770 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f51c2763ef0 R14: 00007f51c2763eb0 R15: 00007f51b7600000
 </TASK>
