INFO: task syz-executor.0:12506 blocked for more than 143 seconds.
      Not tainted 6.0.0-rc6-syzkaller-00045-gdc164f4fb00a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:27960 pid:12506 ppid:  8043 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5182 [inline]
 __schedule+0x91f/0xdf0 kernel/sched/core.c:6494
 schedule+0xcb/0x190 kernel/sched/core.c:6570
 rwsem_down_write_slowpath+0xf1c/0x1350 kernel/locking/rwsem.c:1182
 __down_write_common kernel/locking/rwsem.c:1297 [inline]
 __down_write kernel/locking/rwsem.c:1306 [inline]
 down_write_nested+0x16c/0x180 kernel/locking/rwsem.c:1663
 inode_lock_nested include/linux/fs.h:791 [inline]
 do_unlinkat+0x23d/0x940 fs/namei.c:4280
 __do_sys_unlinkat fs/namei.c:4340 [inline]
 __se_sys_unlinkat fs/namei.c:4333 [inline]
 __x64_sys_unlinkat+0xca/0xf0 fs/namei.c:4333
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7c7648a669
RSP: 002b:00007f7c753bc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007f7c765ac120 RCX: 00007f7c7648a669
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007f7c764e5560 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe6b3ba0ef R14: 00007f7c753bc300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8cb233f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8cb23bf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
 #0: ffffffff8cb23220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3291:
 #0: ffff88807f8e8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc90002d262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
3 locks held by kworker/u4:6/4482:
2 locks held by syz-executor.0/12504:
2 locks held by syz-executor.0/12506:
 #0: ffff888020c6a460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
 #1: ffff88804b955c20 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
 #1: ffff88804b955c20 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: do_unlinkat+0x23d/0x940 fs/namei.c:4280

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc6-syzkaller-00045-gdc164f4fb00a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 nmi_cpu_backtrace+0x425/0x450 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x169/0x280 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+0xcd5/0xd20 kernel/hung_task.c:369
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3754 Comm: syz-fuzzer Not tainted 6.0.0-rc6-syzkaller-00045-gdc164f4fb00a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0033:0x41e6bc
Code: 30 77 14 4c 8b 57 48 47 0f b6 14 02 66 90 45 84 e2 0f 84 40 01 00 00 41 0f b6 14 10 41 84 d4 0f 85 9a 00 00 00 90 f0 45 08 21 <48> 8b 15 f5 04 45 01 84 02 90 90 48 8b 4f 18 90 49 b8 00 00 00 00
RSP: 002b:000000c004849e30 EFLAGS: 00000206
RAX: 000000c00a43ba80 RBX: 000000c006880000 RCX: 0000000000000004
RDX: 0000000000000045 RSI: 000000c00001f698 RDI: 00007f5d0ac96348
RBP: 000000c004849e70 R08: 000000000000001a R09: 00007f5d021d6c0a
R10: 00000000000000d4 R11: 000000000001b8a8 R12: 0000000000000010
R13: 000000c00a43ba80 R14: 000000c000c17d40 R15: 00000000000001b1
FS:  000000c00e09dc90 GS:  0000000000000000