INFO: task syz.1.312:4352 blocked for more than 143 seconds.
      Not tainted 5.15.167-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.312       state:D stack:27168 pid: 4352 ppid:  3573 flags:0x00004000
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:5123
 _free_event+0x34/0xe60 kernel/events/core.c:5129
 put_event kernel/events/core.c:5254 [inline]
 perf_event_release_kernel+0x873/0x900 kernel/events/core.c:5379
 perf_release+0x37/0x40 kernel/events/core.c:5389
 __fput+0x3fe/0x8e0 fs/file_table.c:280
 task_work_run+0x129/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
 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: 0033:0x7fa1cce53ff9
RSP: 002b:00007ffd39a617a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00000000000117ea RCX: 00007fa1cce53ff9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fa1cd00da80 R08: 0000000000000001 R09: 00007ffd39a61a9f
R10: 00007fa1cccd6000 R11: 0000000000000246 R12: 0000000000011866
R13: 00007ffd39a618b0 R14: 0000000000000032 R15: ffffffffffffffff
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c91fc60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by dhcpcd/3237:
2 locks held by getty/3324:
 #0: ffff88814b5c0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc9000228e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
2 locks held by dhcpcd/3382:
1 lock held by syz-executor/3578:

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3384 Comm: dhcpcd Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:fpregs_restore_userregs arch/x86/include/asm/fpu/internal.h:479 [inline]
RIP: 0010:switch_fpu_return+0x108/0x1d0 arch/x86/kernel/fpu/core.c:403
Code: 00 00 00 e8 0a 4e 51 00 db e2 0f 77 41 db 07 0f 1f 44 00 00 e8 f9 4d 51 00 81 e5 ff 04 00 00 4c 89 ff 89 e8 31 d2 48 0f ae 2f <4c> 89 e7 e8 a0 01 00 00 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900024f7eb0 EFLAGS: 00000046
RAX: 0000000000000007 RBX: ffff88807d520000 RCX: ffff88807d520000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807d521980
RBP: 0000000000000007 R08: ffffffff812f0bd7 R09: ffffed100faa4001
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807d521940
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88807d521980
FS:  00007f8532aa3740(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdb498b468 CR3: 00000000757a7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 arch_exit_to_user_mode_prepare arch/x86/include/asm/entry-common.h:58 [inline]
 exit_to_user_mode_prepare+0xd5/0x140 kernel/entry/common.c:216
 __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: 0033:0x55d9b0594f1a
Code: ff 80 bd a0 01 00 00 03 74 bc 48 8d 3d 74 a3 02 00 31 c0 e8 d0 12 00 00 eb ac 48 81 c4 a0 00 00 00 5b 5d 41 5c 41 5d 41 5e c3 <48> 8b 05 df 06 04 00 48 83 f8 05 74 1c 48 8b 05 d2 06 04 00 48 8d
RSP: 002b:00007fff8234fd78 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: 0000000000000000 RBX: 000055d9e9892e20 RCX: 00007f8532b70ad5
RDX: 00007fff8234fd80 RSI: 00007fff8234feb0 RDI: 0000000000000011
RBP: 00007fff82350660 R08: 0000000000000008 R09: 0000000000000000
R10: 00007fff82350660 R11: 0000000000000246 R12: 0000000000000000
R13: 000055d9b05d5610 R14: 00000000ffffffff R15: 0000000000000000
 </TASK>