INFO: task syz.3.2133:9785 blocked for more than 143 seconds.
      Not tainted 5.15.165-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2133      state:D stack:23296 pid: 9785 ppid:  7049 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 perf_pending_task_sync+0x13c/0x1c0 kernel/events/core.c:5122
 _free_event+0x34/0xe60 kernel/events/core.c:5128
 put_event kernel/events/core.c:5253 [inline]
 perf_event_release_kernel+0x873/0x900 kernel/events/core.c:5378
 perf_release+0x37/0x40 kernel/events/core.c:5388
 __fput+0x3fe/0x8e0 fs/file_table.c:280
 task_work_run+0x129/0x1a0 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x6a3/0x2480 kernel/exit.c:874
 do_group_exit+0x144/0x310 kernel/exit.c:996
 get_signal+0xc66/0x14e0 kernel/signal.c:2897
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7ae806ceb9
RSP: 002b:00007f7ae64e9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000000012 RBX: 00007f7ae8208f80 RCX: 00007f7ae806ceb9
RDX: 0000000000000012 RSI: 0000000020000c40 RDI: 0000000000000006
RBP: 00007f7ae80da93e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7ae8208f80 R15: 00007ffe059b3718
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c91fbe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3333:
 #0: ffff88814b3ba098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc9000249b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158

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

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xe72/0xeb0 kernel/hung_task.c:295
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3558 Comm: syz-executor Not tainted 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:reacquire_held_locks+0x5f8/0x660 kernel/locking/lockdep.c:5146
Code: b6 04 08 84 c0 75 5d 83 3d 8c 21 86 0c 00 75 82 48 c7 c7 c0 28 8b 8a 48 c7 c6 00 29 8b 8a e8 7f 9f e8 ff 0f 0b e9 68 ff ff ff <48> c7 c1 c0 5f 86 96 80 e1 07 80 c1 03 38 c1 0f 8c 92 fa ff ff 48
RSP: 0018:ffffc900030776a0 EFLAGS: 00000002
RAX: 0000000000000004 RBX: ffff888073d24660 RCX: 1ffff9200060eee4
RDX: 1ffff9200060eee4 RSI: 0000000000000002 RDI: ffff888073d23b80
RBP: ffffc900030777b0 R08: dffffc0000000000 R09: fffffbfff1bd2a56
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90003077840 R14: 0000000000000002 R15: 0000000000000001
FS:  0000555556593500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd130c05f60 CR3: 000000001a1bf000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __lock_release kernel/locking/lockdep.c:5339 [inline]
 lock_release+0x369/0x9a0 kernel/locking/lockdep.c:5643
 sock_release_ownership include/net/sock.h:1643 [inline]
 release_sock+0x114/0x1c0 net/core/sock.c:3273
 tcp_recvmsg+0x25d/0x7f0 net/ipv4/tcp.c:2565
 inet_recvmsg+0x157/0x280 net/ipv4/af_inet.c:870
 sock_recvmsg_nosec net/socket.c:966 [inline]
 sock_recvmsg net/socket.c:984 [inline]
 sock_read_iter+0x353/0x480 net/socket.c:1057
 call_read_iter include/linux/fs.h:2166 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0xa93/0xe10 fs/read_write.c:485
 ksys_read+0x1a2/0x2c0 fs/read_write.c:623
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5b5215e8bd
Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb b5 e8 78 48 00 00 0f 1f 84 00 00 00 00 00 80 3d 81 3c 17 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec
RSP: 002b:00007ffd9c1c7d28 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5b5215e8bd
RDX: 0000000000000004 RSI: 00007ffd9c1c7d3c RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd9c1fa0b0 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd9c1c8130
R13: 0000000000000004 R14: 00007ffd9c1c7d3c R15: 00007ffd9c1c7dd0
 </TASK>