INFO: task syz.1.5014:17279 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-06588-g759dfc7d04ba-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.5014      state:D stack:25096 pid:17279 tgid:17279 ppid:5817   task_flags:0x400040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1737/0x4d30
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e3/0x1340
 pipe_release+0x48/0x330
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f178878eb69
RSP: 002b:00007fffc77ce8b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f17889b7ba0 RCX: 00007f178878eb69
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f17889b7ba0 R08: 0000000000017dd4 R09: 00000019c77cebaf
R10: 00007f17889b7ac0 R11: 0000000000000246 R12: 00000000000372b2
R13: 00007f17889b5fa0 R14: ffffffffffffffff R15: 00007fffc77ce9d0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e13c4e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by udevd/5268:
1 lock held by dhcpcd/5565:
2 locks held by dhcpcd/5567:
2 locks held by getty/5647:
 #0: ffff88801f5180a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by dhcpcd/5690:
1 lock held by sshd/5747:
1 lock held by syz-executor/5755:
1 lock held by syz-executor/5817:
1 lock held by syz-executor/5818:
1 lock held by syz.1.5014/17279:
 #0: ffff88802ed27868 (&pipe->mutex){+.+.}-{4:4}, at: pipe_release+0x48/0x330
1 lock held by syz.1.5014/17281:
 #0: ffff88802ed27868 (&pipe->mutex){+.+.}-{4:4}, at: splice_file_to_pipe+0x2e/0x440
1 lock held by syz.0.5029/17316:
1 lock held by syz.0.5029/17317:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Not tainted 6.16.0-syzkaller-06588-g759dfc7d04ba-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 101 PID: 5567 Comm: dhcpcd Not tainted 6.16.0-syzkaller-06588-g759dfc7d04ba-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:lockdep_hardirqs_on+0x3c/0x150
Code: 07 48 89 44 24 08 65 48 8b 1c 25 08 00 9a 92 83 3d 98 e2 30 04 00 0f 84 94 00 00 00 65 8b 05 8b 36 2a 07 a9 00 00 f0 00 75 51 <65> 8b 05 7d 76 2a 07 85 c0 75 7b 65 8b 05 3a 73 2a 07 85 c0 75 70
RSP: 0018:ffffc90002bffa28 EFLAGS: 00000046
RAX: 0000000080000002 RBX: ffff88801f97d640 RCX: 78c60ca6a8aafa00
RDX: 0000000000000000 RSI: ffffffff8db65e93 RDI: ffffffff8b6fd334
RBP: 0000000000000000 R08: ffffffff8fa07af7 R09: 1ffffffff1f40f5e
R10: dffffc0000000000 R11: fffffbfff1f40f5f R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fa2462a1740(0000) GS:ffff8881a3c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c7f7c16600 CR3: 000000002764c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 irqentry_exit+0x74/0x90
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:native_apic_msr_write+0x39/0x50
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 92 a2 8b 03 66
RSP: 0018:ffffc90002bffb08 EFLAGS: 00000246
RAX: 00000000000000f6 RBX: 0000000000000200 RCX: 000000000000083f
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f
RBP: ffffc90002bffbe0 R08: ffffc90002bffb67 R09: 1ffff9200057ff6c
R10: dffffc0000000000 R11: fffff5200057ff6d R12: ffff888136631401
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881366314b0
 arch_irq_work_raise+0x6d/0x80
 __irq_work_queue_local+0x1d7/0x550
 irq_work_queue+0x99/0x140
 bpf_send_signal_common+0x3b4/0x540
 bpf_send_signal+0x1d/0x30
 bpf_prog_7ba5217f62dcd359+0x41/0x49
 bpf_trace_run2+0x284/0x4b0
 __bpf_trace_sys_enter+0x38/0x60
 trace_sys_enter+0xb0/0x100
 syscall_trace_enter+0xf9/0x160
 do_syscall_64+0xd3/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa2462dbad9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <48> 81 ec b8 00 00 00 41 89 f9 48 89 f0 49 89 d0 48 85 f6 0f 84 be
RSP: 002b:00007ffc4d813f80 EFLAGS: 00000293 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 000055c80ca89e10 RCX: 00007fa2462dbad9
RDX: 000055c7f7c16610 RSI: 00007ffc4d8140b0 RDI: 0000000000000011
RBP: 00007ffc4d814720 R08: 0000000000000008 R09: 000055c7f7c163d0
R10: 00007ffc4d814720 R11: 0000000000000293 R12: 0000000000000000
R13: 000055c7f7c16610 R14: 00000000ffffffff R15: 0000000000000000
 </TASK>
