INFO: task syz-executor:2855 blocked for more than 143 seconds.
      Not tainted 5.15.180-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:11840 pid: 2855 ppid:     1 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x378/0x13e0 kernel/sched/core.c:6376
 schedule+0x68/0xb0 kernel/sched/core.c:6459
 io_schedule+0x3d/0x60 kernel/sched/core.c:8484
 wait_on_page_bit_common+0x114/0x470 mm/filemap.c:1356
 lock_page include/linux/pagemap.h:625 [inline]
 truncate_inode_pages_range+0x28a/0x530 mm/truncate.c:394
 evict+0x28d/0x2b0 fs/inode.c:649
 dispose_list+0x43/0x60 fs/inode.c:680
 evict_inodes+0x16b/0x1b0 fs/inode.c:734
 generic_shutdown_super+0x2d/0x120 fs/super.c:454
 kill_block_super+0x1c/0x40 fs/super.c:1427
 deactivate_locked_super+0x27/0x90 fs/super.c:335
 cleanup_mnt+0x10b/0x150 fs/namespace.c:1143
 task_work_run+0x54/0x80 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:181 [inline]
 exit_to_user_mode_prepare+0x15d/0x160 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x12/0x30 kernel/entry/common.c:307
 do_syscall_64+0x40/0x80 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f24e899a0d7
RSP: 002b:00007ffccf3fc448 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f24e8a1a08c RCX: 00007f24e899a0d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffccf3fc500
RBP: 00007ffccf3fc500 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffccf3fd590
R13: 00007f24e8a1a08c R14: 000000000000d42b R15: 00007ffccf3fd5d0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffffffff837dc340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0xf7 kernel/locking/lockdep.c:6469
2 locks held by getty/1477:
 #0: ffff888100c0c098 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x50 drivers/tty/tty_ldisc.c:252
 #1: ffffc900032572e8 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x4eb/0x610 drivers/tty/n_tty.c:2158
1 lock held by syz-executor/2855:
 #0: ffff88810a2eb0e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/3243:
 #0: ffff88810c3bf0e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/3629:
 #0: ffff88811508c0e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/4014:
 #0: ffff88811eb060e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/4397:
 #0: ffff88811f3220e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/4780:
 #0: ffff88810b6c90e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/5163:
 #0: ffff88811efd40e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/5546:
 #0: ffff88811f7bb0e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/5929:
 #0: ffff88811f8700e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365
1 lock held by syz-executor/6312:
 #0: ffff88811fe550e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30 fs/super.c:365

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

NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x41/0x5e lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x32/0x80 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x91/0xb0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0x4a2/0x4e0 kernel/hung_task.c:369
 kthread+0x124/0x150 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:722