INFO: task syz-executor:23077 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:21928 pid:23077 tgid:23077 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: 0033:0x7f2eff18ff17
RSP: 002b:00007ffff706f518 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f2eff211c05 RCX: 00007f2eff18ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffff706f5d0
RBP: 00007ffff706f5d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffff7070660
R13: 00007f2eff211c05 R14: 00000000000ddbc6 R15: 00007ffff70706a0
 </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/5674:
 #0: ffff88802310a0a0 (&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
3 locks held by kworker/0:4/5914:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000473fbc0 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
3 locks held by kworker/0:8/6841:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90002fffbc0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff8880243e6240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x26b/0x3180
1 lock held by syz-executor/23077:
 #0: ffff8880237cc0e0 (&type->s_umount_key#134){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.8.2321/25158:
 #0: ffff8880237cc0e0 (&type->s_umount_key#134){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.8.2580/32664:
 #0: ffff8880237cc0e0 (&type->s_umount_key#134){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/468:

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

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: 468 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: 0010:__get_pfnblock_flags_mask+0x149/0x240
Code: 00 04 00 f3 0f 1e fa 49 39 c7 48 8b 1c 24 49 bd 00 00 00 00 00 fc ff df 73 59 48 c7 c0 00 e0 b1 99 48 c1 e8 03 42 80 3c 28 00 <74> 0c 48 c7 c7 00 e0 b1 99 e8 b9 04 0e 00 48 8b 05 42 c4 9c 17 48
RSP: 0018:ffffc9000327f688 EFLAGS: 00000046
RAX: 1ffffffff3363c00 RBX: 0000000000000017 RCX: dffffc0000000000
RDX: 0000000000000017 RSI: 0000000000044714 RDI: ffffea000111c500
RBP: 0000000000000780 R08: 0000000000000000 R09: 1ffffd40002238a6
R10: dffffc0000000000 R11: fffff940002238a7 R12: 0000000000000008
R13: dffffc0000000000 R14: 0000000000044714 R15: 0000000000000000
FS:  0000555581f43500(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa52edff3b0 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __add_to_free_list+0x88/0x3d0
 __free_one_page+0x6df/0xbd0
 free_pcppages_bulk+0x2da/0x4e0
 free_frozen_page_commit+0x62c/0x1070
 __free_frozen_pages+0x67f/0xd30
 vfree+0x25a/0x400
 kcov_close+0x28/0x50
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe599790a7c
Code: Unable to access opcode bytes at 0x7fe599790a52.
RSP: 002b:00007fffb0af7120 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: 000000000000002c RBX: 00007fe59a4f4620 RCX: 00007fe599790a7c
RDX: 000000000000002c RSI: 00007fe59a4f4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fffb0af7174 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fe59a4f4670 R15: 0000000000000000
 </TASK>
