INFO: task syz-executor:12616 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:18856 pid:12616 tgid:12616 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: 0033:0x7f4e9638ff17
RSP: 002b:00007ffdfa249088 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f4e96411c05 RCX: 00007f4e9638ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdfa249140
RBP: 00007ffdfa249140 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdfa24a1d0
R13: 00007f4e96411c05 R14: 000000000006005c R15: 00007ffdfa24a210
 </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/5678:
 #0: ffff88802390a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by syz-executor/12616:
 #0: ffff8880387b40e0 (&type->s_umount_key#65){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.5.991/15812:
 #0: ffff8880387b40e0 (&type->s_umount_key#65){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
3 locks held by syz.4.1219/17896:
 #0: ffff88801dc974b0 (&bdev->bd_fsfreeze_mutex){+.+.}-{4:4}, at: bdev_freeze+0x2a/0x220
 #1: ffff888034a0c428 (sb_writers#4){++++}-{0:0}, at: freeze_super+0x4db/0x1130
 #2: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
2 locks held by syz.7.1221/17909:

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

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+0x3fc/0x770
 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: 17909 Comm: syz.7.1221 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:folio_mapping+0xa7/0x240
Code: ff e8 dd 99 bd ff 49 83 e5 01 0f 85 80 01 00 00 48 89 df be 08 00 00 00 e8 76 05 21 00 49 89 dd 49 c1 ed 03 43 80 7c 3d 00 00 <74> 08 48 89 df e8 ef 02 21 00 48 8b 2b 48 89 ee 48 81 e6 00 00 02
RSP: 0018:ffffc9000403fa58 EFLAGS: 00000246
RAX: ffffffff82021901 RBX: ffffea000478b280 RCX: ffffffff8202192a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea000478b280
RBP: 00000000ff000000 R08: ffffea000478b287 R09: 1ffffd40008f1650
R10: dffffc0000000000 R11: fffff940008f1651 R12: 1ffffd40008f1651
R13: 1ffffd40008f1650 R14: ffffea000478b288 R15: dffffc0000000000
FS:  00007f2a9ec896c0(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f967ee93d58 CR3: 0000000021590000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 folio_mark_dirty+0x1e/0x190
 shmem_write_end+0x424/0x5d0
 generic_perform_write+0x62a/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: 0033:0x7f2a9dd8d69f
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:00007f2a9ec88df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f2a9dd8d69f
RDX: 0000000001000000 RSI: 00007f2a93a00000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009600
R10: 0000200000012cc2 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f2a9ec88ef0 R14: 00007f2a9ec88eb0 R15: 00007f2a93a00000
 </TASK>
