INFO: task kworker/u8:0:11 blocked for more than 142 seconds.
      Not tainted 6.13.0-syzkaller-07259-g0f8e26b38d7a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:0    state:D stack:24296 pid:11    tgid:11    ppid:2      flags:0x00004000
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x1142/0x5b60 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6856
 bit_wait+0x15/0xe0 kernel/sched/wait_bit.c:237
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xda/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit include/linux/wait_bit.h:77 [inline]
 netfs_retry_writes+0x2fa/0x1a00 fs/netfs/write_retry.c:215
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-syzkaller-07259-g0f8e26b38d7a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
 watchdog+0xf14/0x1240 kernel/hung_task.c:397
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10 Comm: kworker/0:0H Not tainted 6.13.0-syzkaller-07259-g0f8e26b38d7a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_highpri snd_vmidi_output_work
RIP: 0010:update_min_vruntime+0xf9/0x280 kernel/sched/fair.c:776
Code: 00 0f 85 82 01 00 00 4d 85 f6 4d 8b 64 24 70 74 28 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 63 01 00 00 48 8b 6d 20 4c 39 e5 78 4a 4c 89 e5 49 89 ec 4d
RSP: 0018:ffffc900000f7858 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8880b863ec40 RCX: 0000000000000000
RDX: 1ffff11006417086 RSI: ffff88801d2f0080 RDI: ffff8880320b8430
RBP: ffff8880320b8410 R08: 1ffffffff1b5579d R09: 0000000000000000
R10: 0000000000000000 R11: ffff8880b863f458 R12: 0000000f99b839c5
R13: 0000000f9a1e7b73 R14: ffff8880320b8400 R15: 0000000f99b839c5
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020004000 CR3: 000000005be46000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 update_curr+0x1bb/0x800 kernel/sched/fair.c:1228
 put_prev_entity+0x123/0x260 kernel/sched/fair.c:5585
 put_prev_task_fair+0x3c/0x80 kernel/sched/fair.c:8951
 put_prev_set_next_task kernel/sched/sched.h:2518 [inline]
 pick_next_task kernel/sched/core.c:6326 [inline]
 __schedule+0x1616/0x5b60 kernel/sched/core.c:6716
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6943
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 class_spinlock_irqsave_destructor include/linux/spinlock.h:572 [inline]
 snd_rawmidi_transmit+0xfb/0x140 sound/core/rawmidi.c:1486
 snd_vmidi_output_work+0x112/0x390 sound/core/seq/seq_virmidi.c:151
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>