INFO: task syz-executor549:8196 blocked for more than 143 seconds.
      Not tainted 5.12.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor549 state:D stack:27488 pid: 8196 ppid:  8181 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x8de/0x2170 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 request_wait_answer+0x39b/0x6c0 fs/fuse/dev.c:411
 __fuse_request_send fs/fuse/dev.c:430 [inline]
 fuse_simple_request+0x41a/0xb10 fs/fuse/dev.c:515
 fuse_file_fallocate+0x2e2/0x700 fs/fuse/file.c:3299
 vfs_fallocate+0x2a5/0xaf0 fs/open.c:311
 ioctl_preallocate+0x145/0x1c0 fs/ioctl.c:494
 file_ioctl fs/ioctl.c:534 [inline]
 do_vfs_ioctl+0xb53/0xd70 fs/ioctl.c:732
 __do_sys_ioctl fs/ioctl.c:751 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0xc5/0x190 fs/ioctl.c:739
 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f217d3885b9
RSP: 002b:00007f217d33a2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f217d4144c0 RCX: 00007f217d3885b9
RDX: 00000000200001c0 RSI: 0000000040305828 RDI: 0000000000000004
RBP: 00007f217d3e20d4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 00007f217d3de0c8 R14: 00007f217d3e00d0 R15: 00007f217d4144c8

Showing all locks held in the system:
1 lock held by khungtaskd/1624:
 #0: ffffffff8ab6c040 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327
2 locks held by getty/5092:
 #0: ffff888022b0c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:266
 #1: ffffc900016062e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xa69/0xfa0 drivers/tty/n_tty.c:2178
1 lock held by syz-executor549/8196:
 #0: ffff88801b67a460 (sb_writers#13){.+.+}-{0:0}, at: ioctl_preallocate+0x145/0x1c0 fs/ioctl.c:494

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

NMI backtrace for cpu 1
CPU: 1 PID: 1624 Comm: khungtaskd Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0xa5/0xe6 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0x956/0xc30 kernel/hung_task.c:294
 kthread+0x36f/0x450 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x161/0x1c0 drivers/acpi/processor_idle.c:516