INFO: task syz-executor.4:15198 blocked for more than 143 seconds.
      Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:25344 pid:15198 tgid:15196 ppid:12535  flags:0x00020006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0xf15/0x5c70 kernel/sched/core.c:6736
 __schedule_loop kernel/sched/core.c:6813 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6828
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
 __do_sys_io_uring_register+0x1a7/0x21f0 io_uring/register.c:612
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fc89147dda9
RSP: 002b:00007fc8921270c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007fc8915ac050 RCX: 00007fc89147dda9
RDX: 00000000200000f0 RSI: 0000000000000018 RDI: 0000000000000004
RBP: 00007fc8914ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fc8915ac050 R15: 00007fff60a98518
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u8:1/11:
3 locks held by kworker/1:0/24:
 #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x128f/0x1a50 kernel/workqueue.c:3229
 #1: ffffc900001e7d80 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x8ff/0x1a50 kernel/workqueue.c:3230
 #2: ffff888020d1e240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1bb/0x26e0 drivers/net/netdevsim/fib.c:1489
1 lock held by khungtaskd/29:
 #0: ffffffff8d7afaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8d7afaa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8d7afaa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:5/142:
 #0: ffff888014c81148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x128f/0x1a50 kernel/workqueue.c:3229
 #1: ffffc90002e3fd80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8ff/0x1a50 kernel/workqueue.c:3230
2 locks held by getty/4809:
 #0: ffff88802a3b40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900022b82f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.4/15197:
1 lock held by syz-executor.4/15198:
 #0: ffff88803e99a0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_register+0x1a7/0x21f0 io_uring/register.c:612
1 lock held by syz-executor.2/15719:
 #0: ffff888089c300e0 (&type->s_umount_key#89/1){+.+.}-{3:3}, at: alloc_super+0x23d/0xbd0 fs/super.c:343
3 locks held by syz-executor.4/16378:

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf86/0x1210 kernel/hung_task.c:379
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 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: 4497 Comm: klogd Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:lock_release+0x54/0x6a0 kernel/locking/lockdep.c:5762
Code: 24 08 48 c7 44 24 10 b3 8a b5 41 48 c1 ed 03 48 c7 44 24 18 c0 25 fd 8c 48 01 e8 48 c7 44 24 20 80 3b 6b 81 c7 00 f1 f1 f1 f1 <c7> 40 04 f1 f1 04 f2 c7 40 08 04 f3 f3 f3 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc9000346f898 EFLAGS: 00000082
RAX: fffff5200068df15 RBX: ffff8880b9428a08 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff815dfd30 RDI: ffff8880b9428a08
RBP: 1ffff9200068df15 R08: 0000000000000000 R09: fffffbfff27ae032
R10: ffffffff93d70197 R11: 0000000000000004 R12: ffff8880b9428a08
R13: ffff8880b9428a00 R14: dffffc0000000000 R15: ffffffff8d69dd80
FS:  00007f1a1edc5380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0120d7000 CR3: 000000002e430000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 do_write_seqcount_end include/linux/seqlock.h:515 [inline]
 psi_account_irqtime+0x305/0x510 kernel/sched/psi.c:1021
 update_rq_clock_task kernel/sched/core.c:726 [inline]
 update_rq_clock kernel/sched/core.c:770 [inline]
 update_rq_clock+0x250/0xb30 kernel/sched/core.c:751
 ttwu_queue kernel/sched/core.c:4056 [inline]
 try_to_wake_up+0x56a/0x13e0 kernel/sched/core.c:4378
 autoremove_wake_function+0x16/0x150 kernel/sched/wait.c:384
 receiver_wake_function+0x53/0x80 net/core/datagram.c:82
 __wake_up_common+0x131/0x1e0 kernel/sched/wait.c:89
 __wake_up_common_lock kernel/sched/wait.c:106 [inline]
 __wake_up_sync_key+0x36/0x50 kernel/sched/wait.c:173
 sock_def_readable+0x160/0x760 net/core/sock.c:3342
 unix_dgram_sendmsg+0x11b9/0x1d10 net/unix/af_unix.c:2099
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x47f/0x4e0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2199
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f1a1ef279b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff53564568 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1a1ef279b5
RDX: 000000000000004c RSI: 00005555ea39d480 RDI: 0000000000000003
RBP: 00005555ea3942c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f1a1f0b5212 R14: 00007fff53564668 R15: 0000000000000000
 </TASK>