INFO: task syz-executor292:4281 blocked for more than 143 seconds.
Not tainted 6.1.138-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor292 state:D stack:26120 pid:4281 ppid:4270 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
perf_pending_task_sync kernel/events/core.c:5033 [inline]
_free_event+0x171/0x10a0 kernel/events/core.c:5039
put_event kernel/events/core.c:5164 [inline]
perf_event_release_kernel+0x832/0x8c0 kernel/events/core.c:5289
perf_release+0x37/0x40 kernel/events/core.c:5299
__fput+0x22c/0x920 fs/file_table.c:320
task_work_run+0x1ca/0x250 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0x936/0x2400 kernel/exit.c:871
do_group_exit+0x217/0x2d0 kernel/exit.c:1021
get_signal+0x1272/0x1350 kernel/signal.c:2871
arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7ef4465a69
RSP: 002b:00007fff9635a638 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: 00000000000010ba RBX: 0000000000000000 RCX: 00007f7ef4465a69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000126400
RBP: 000000000001e201 R08: 0000000000000000 R09: 00007fff9635a668
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff9635a66c
R13: 431bde82d7b634db R14: 00007f7ef44dc344 R15: 00007fff9635a670
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c92b2f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c92bb10 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/27:
#0: ffffffff8c92a960 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8c92a960 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8c92a960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4018:
#0: ffff8880304da098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000325e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.1.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3f4/0x470 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 6.1.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: 0x0 (events_unbound)
RIP: 0010:div_u64_rem include/linux/math64.h:29 [inline]
RIP: 0010:div_u64 include/linux/math64.h:128 [inline]
RIP: 0010:___update_load_avg kernel/sched/pelt.c:265 [inline]
RIP: 0010:update_rt_rq_load_avg+0x481/0x980 kernel/sched/pelt.c:353
Code: b3 60 0b 00 00 48 8d bb 50 0b 00 00 48 89 f8 48 c1 e8 03 80 3c 28 00 74 05 e8 1b 20 74 00 48 8b 83 50 0b 00 00 31 d2 49 f7 f4 <49> 89 c6 48 8d bb 68 0b 00 00 48 89 f8 48 c1 e8 03 80 3c 28 00 74
RSP: 0018:ffffc900000e7898 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b8e3aa40 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 000000000000001f RDI: ffff8880b8e3b590
RBP: dffffc0000000000 R08: ffffffff8f7cd008 R09: ffffffff8f7cd018
R10: ffffffff8f7cd010 R11: ffffffff8f7cd003 R12: 000000000000b800
R13: ffff8880b8e3b59c R14: 0000000000000000 R15: 000000000000b800
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e877104168 CR3: 000000000c68e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__update_blocked_others kernel/sched/fair.c:8706 [inline]
update_blocked_averages+0x2ea/0x1560 kernel/sched/fair.c:8837
newidle_balance+0x445/0x1040 kernel/sched/fair.c:11607
pick_next_task_fair+0x226/0xbd0 kernel/sched/fair.c:7914
__pick_next_task kernel/sched/core.c:5870 [inline]
pick_next_task kernel/sched/core.c:5945 [inline]
__schedule+0x6a3/0x40d0 kernel/sched/core.c:6524
schedule+0xb9/0x180 kernel/sched/core.c:6637
worker_thread+0xef6/0x1250 kernel/workqueue.c:2460
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295