INFO: task syz-executor.0:5437 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc2-next-20240402-syzkaller-03220-gc0b832517f62 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:19960 pid:5437  tgid:5437  ppid:1      flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 fuse_lock_inode+0xd3/0x120 fs/fuse/inode.c:553
 fuse_lookup+0x115/0x600 fs/fuse/dir.c:428
 __lookup_slow+0x28c/0x3f0 fs/namei.c:1692
 lookup_slow+0x53/0x70 fs/namei.c:1709
 walk_component fs/namei.c:2004 [inline]
 link_path_walk+0x9ea/0xea0 fs/namei.c:2331
 path_openat+0x24a/0x3240 fs/namei.c:3795
 do_filp_open+0x235/0x490 fs/namei.c:3826
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1406
 do_sys_open fs/open.c:1421 [inline]
 __do_sys_openat fs/open.c:1437 [inline]
 __se_sys_openat fs/open.c:1432 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1432
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f412507c541
RSP: 002b:00007fff680c9af0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f412507c541
RDX: 0000000000090800 RSI: 00007f41250c745d RDI: 00000000ffffff9c
RBP: 00007fff680c9bbc R08: 0000000000000000 R09: 00007f4125e1f0b0
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 0000000000017665 R14: 000000000001760f R15: 0000000000000006
 </TASK>
INFO: task syz-executor.0:5510 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc2-next-20240402-syzkaller-03220-gc0b832517f62 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:23960 pid:5510  tgid:5505  ppid:5437   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 request_wait_answer fs/fuse/dev.c:407 [inline]
 __fuse_request_send fs/fuse/dev.c:426 [inline]
 fuse_simple_request+0x1199/0x1b90 fs/fuse/dev.c:513
 fuse_lookup_name+0x32e/0x890 fs/fuse/dir.c:386
 fuse_lookup+0x182/0x600 fs/fuse/dir.c:429
 __lookup_slow+0x28c/0x3f0 fs/namei.c:1692
 lookup_slow+0x53/0x70 fs/namei.c:1709
 walk_component fs/namei.c:2004 [inline]
 link_path_walk+0x9ea/0xea0 fs/namei.c:2331
 path_openat+0x24a/0x3240 fs/namei.c:3795
 do_filp_open+0x235/0x490 fs/namei.c:3826
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1406
 do_sys_open fs/open.c:1421 [inline]
 __do_sys_openat fs/open.c:1437 [inline]
 __se_sys_openat fs/open.c:1432 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1432
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f412507b6e0
RSP: 002b:00007f4125dfce20 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f412507b6e0
RDX: 0000000000000002 RSI: 00007f4125dfcf40 RDI: 00000000ffffff9c
RBP: 00007f4125dfcf40 R08: 0000000000000000 R09: 00000000000004a0
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000004
R13: 00007f4125dfcf3c R14: 00007f4125dfcf40 R15: 00007f411be00000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4839:
 #0: ffff88802a8030a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f0e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.0/5437:
 #0: ffff88807dd30150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:796 [inline]
 #0: ffff88807dd30150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
 #1: ffff88807dd30618 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd3/0x120 fs/fuse/inode.c:553
2 locks held by syz-executor.0/5510:
 #0: ffff88807dd30150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:796 [inline]
 #0: ffff88807dd30150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
 #1: ffff88807dd30618 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd3/0x120 fs/fuse/inode.c:553

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

NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.9.0-rc2-next-20240402-syzkaller-03220-gc0b832517f62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfde/0x1020 kernel/hung_task.c:380
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5427 Comm: syz-execprog Not tainted 6.9.0-rc2-next-20240402-syzkaller-03220-gc0b832517f62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0033:0x43620b
Code: c4 80 06 00 00 5d c3 44 89 c2 8b 05 97 b4 c8 00 48 8d 5c 24 78 b9 80 00 00 00 48 89 cf be 80 00 00 00 41 89 d0 e8 35 0f fd ff <48> 85 db 74 20 48 83 fb 04 0f 85 0b 02 00 00 44 8b 44 24 2c 90 45
RSP: 002b:000000c00008f7a0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000080 RSI: 000000c00008f818 RDI: 0000000000000004
RBP: 000000c00008fe20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000003e7 R11: 0000000000000246 R12: 000000c00008f820
R13: 0000000000000001 R14: 000000c000007040 R15: 0000000000000003
FS:  000000c00005a890 GS:  0000000000000000