INFO: task syz-executor.0:23285 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00041-g547ab8fc4cb0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:26512 pid:23285 tgid:23279 ppid:5103   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x177f/0x49a0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 request_wait_answer fs/fuse/dev.c:407 [inline]
 __fuse_request_send fs/fuse/dev.c:426 [inline]
 fuse_simple_request+0x1198/0x1b90 fs/fuse/dev.c:513
 fuse_send_open fs/fuse/file.c:50 [inline]
 fuse_file_open+0x50d/0xb60 fs/fuse/file.c:147
 fuse_do_open fs/fuse/file.c:174 [inline]
 fuse_open_common+0x302/0x680 fs/fuse/file.c:253
 do_dentry_open+0x907/0x15a0 fs/open.c:953
 do_open fs/namei.c:3641 [inline]
 path_openat+0x285f/0x3240 fs/namei.c:3798
 do_filp_open+0x234/0x490 fs/namei.c:3825
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x225/0x270 fs/open.c:1423
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fc95b07dda9
RSP: 002b:00007fc95bdbc0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fc95b1ac1f0 RCX: 00007fc95b07dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007fc95b0ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fc95b1ac1f0 R15: 00007ffc09766c78
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:6/1056:
 #0: ffff888014c8d938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
 #0: ffff888014c8d938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
 #1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
2 locks held by getty/4815:
 #0: ffff88802fe700a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.2/5100:
1 lock held by syz-executor.3/23587:
 #0: ffff88803352a310 (&type->i_mutex_dir_key#19){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
 #0: ffff88803352a310 (&type->i_mutex_dir_key#19){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.3/23605:
 #0: ffff88807c5c4420 (sb_writers#34){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
 #1: ffff88803352a310 (&type->i_mutex_dir_key#19/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
 #1: ffff88803352a310 (&type->i_mutex_dir_key#19/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3891

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc3-syzkaller-00041-g547ab8fc4cb0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 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:222 [inline]
 watchdog+0xfaf/0xff0 kernel/hung_task.c:379
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5100 Comm: syz-executor.2 Not tainted 6.8.0-rc3-syzkaller-00041-g547ab8fc4cb0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x0/0x90 kernel/kcov.c:289
Code: 18 4c 89 44 11 20 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 4c 8b 04 24 65 48 8b 15 80 55 70 7e 65 8b 05 81 55 70
RSP: 0018:ffffc90004607af0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 000000000000007a RCX: dffffc0000000000
RDX: ffff88801fea1dc0 RSI: 000000000000007a RDI: 000000000000005c
RBP: ffff88803d1e0ffa R08: ffffffff8456093d R09: 1ffffffff1f08565
R10: dffffc0000000000 R11: fffffbfff1f08566 R12: 0000000000000012
R13: 0000000000000011 R14: 0000000000000002 R15: ffff88803d1e0ffa
FS:  00005555568a7480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff585a43866 CR3: 0000000040d5a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 tomoyo_encode2 security/tomoyo/realpath.c:36 [inline]
 tomoyo_encode+0x13d/0x540 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x59e/0x5e0 security/tomoyo/realpath.c:283
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x23a/0x880 security/tomoyo/file.c:723
 security_file_ioctl+0x75/0xb0 security/security.c:2725
 __do_sys_ioctl fs/ioctl.c:865 [inline]
 __se_sys_ioctl+0x47/0x170 fs/ioctl.c:857
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f3bd147db0b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffe82a50330 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000000054a0 RCX: 00007f3bd147db0b
RDX: 00007ffe82a503a8 RSI: 0000000040086602 RDI: 0000000000000005
RBP: 00007ffe82a50440 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe82a51500
R13: 00007f3bd14c93b9 R14: 00005555568a7430 R15: 0000000000000005
 </TASK>