INFO: task syz.2.505:7060 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-06620-gae633388cae3-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.505       state:D stack:24104 pid:7060  tgid:7060  ppid:5823   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: 0033:0x7fc288d8ebe9
RSP: 002b:00007fff956ba568 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fc288fb7da0 RCX: 00007fc288d8ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc288fb7da0 R08: 000000000000f3f4 R09: 0000001a956ba85f
R10: 00007fc288fb7cb0 R11: 0000000000000246 R12: 0000000000014b4a
R13: 00007fc288fb6450 R14: ffffffffffffffff R15: 00007fff956ba680
 </TASK>
INFO: task syz.2.505:7067 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-06620-gae633388cae3-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.505       state:D stack:28904 pid:7067  tgid:7060  ppid:5823   task_flags:0x400040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1737/0x4d30
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e3/0x1340
 anon_pipe_write+0x16a/0x1360
 vfs_write+0x54b/0xa90
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc288d8ebe9
RSP: 002b:00007fc289c38038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc288fb6090 RCX: 00007fc288d8ebe9
RDX: 00000000ffffff98 RSI: 0000200000000000 RDI: 0000000000000009
RBP: 00007fc288e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc288fb6128 R14: 00007fc288fb6090 R15: 00007fff956ba408
 </TASK>
INFO: task syz.2.505:7070 blocked for more than 144 seconds.
      Not tainted 6.16.0-syzkaller-06620-gae633388cae3-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.505       state:D stack:28904 pid:7070  tgid:7060  ppid:5823   task_flags:0x400040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1737/0x4d30
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e3/0x1340
 do_splice+0x434/0x1660
 __se_sys_splice+0x2e1/0x460
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc288d8ebe9
RSP: 002b:00007fc289c17038 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007fc288fb6180 RCX: 00007fc288d8ebe9
RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007fc288e11e19 R08: 0000000000000080 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc288fb6218 R14: 00007fc288fb6180 R15: 00007fff956ba408
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13c4e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by kcompactd0/38:
3 locks held by syslogd/5250:
2 locks held by klogd/5257:
2 locks held by getty/5645:
 #0: ffff8881051040a0 (&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 sshd/5802:
1 lock held by syz-executor/5823:
1 lock held by syz-executor/5825:
1 lock held by syz.2.505/7060:
 #0: ffff88803165dc68 (&pipe->mutex){+.+.}-{4:4}, at: pipe_release+0x48/0x330
1 lock held by syz.2.505/7061:
 #0: ffff88803165dc68 (&pipe->mutex){+.+.}-{4:4}, at: splice_file_to_pipe+0x2e/0x440
1 lock held by syz.2.505/7067:
 #0: ffff88803165dc68 (&pipe->mutex){+.+.}-{4:4}, at: anon_pipe_write+0x16a/0x1360
2 locks held by syz.2.505/7070:
 #0: ffff88803165d868 (&pipe->mutex){+.+.}-{4:4}, at: pipe_double_lock+0x6b/0x100
 #1: ffff88803165dc68 (&pipe->mutex){+.+.}-{4:4}, at: do_splice+0x434/0x1660
4 locks held by syz.0.534/7131:
1 lock held by syz.0.534/7132:
1 lock held by syz.0.534/7133:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-syzkaller-06620-gae633388cae3-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: 0 PID: 754 Comm: kworker/u9:4 Not tainted 6.16.0-syzkaller-06620-gae633388cae3-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lock_release+0x96/0x3e0
Code: b0 be fc 10 85 c0 0f 85 35 02 00 00 65 4c 8b 3c 25 08 00 9a 92 41 83 bf ec 0a 00 00 00 0f 85 1e 02 00 00 49 81 3e 40 c3 5d 93 <0f> 84 11 02 00 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 48 8b
RSP: 0018:ffffc9000464f658 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ad2579676943c700
RDX: 0000000000000000 RSI: ffffffff8be309e0 RDI: ffffffff8be309a0
RBP: ffffc9000464f810 R08: ffff88801a475063 R09: 1ffff1100348ea0c
R10: dffffc0000000000 R11: ffffed100348ea0d R12: dffffc0000000000
R13: ffffffff81675b12 R14: ffffffff8e13c4e0 R15: ffff888021a11cc0
FS:  0000000000000000(0000) GS:ffff8881a3c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffed9a55e8 CR3: 000000000df38000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __text_poke+0x83e/0xa10
 smp_text_poke_batch_finish+0x90a/0x1130
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_enable_cpuslocked+0x128/0x250
 static_key_enable+0x1a/0x20
 toggle_allocation_gate+0xad/0x240
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
