INFO: task syz.1.2324:7570 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2324 state:D stack:0 pid:7570 tgid:7568 ppid:289 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x1322/0x1df0 kernel/sched/core.c:7791
__schedule_loop kernel/sched/core.c:7872 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7887
request_wait_answer fs/fuse/dev.c:476 [inline]
__fuse_request_send fs/fuse/dev.c:491 [inline]
__fuse_simple_request+0xdb1/0x1980 fs/fuse/dev.c:586
fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
fuse_lookup_name+0x2db/0x990 fs/fuse/dir.c:526
fuse_lookup+0x2ad/0x18f0 fs/fuse/dir.c:624
__lookup_slow+0x2d4/0x400 fs/namei.c:1732
lookup_slow+0x57/0x80 fs/namei.c:1749
walk_component fs/namei.c:2053 [inline]
link_path_walk+0x990/0xec0 fs/namei.c:2418
path_openat+0x281/0x34b0 fs/namei.c:3929
do_filp_open+0x1c6/0x3e0 fs/namei.c:3960
do_sys_openat2+0x12c/0x1c0 fs/open.c:1438
do_sys_open fs/open.c:1453 [inline]
__do_sys_openat fs/open.c:1469 [inline]
__se_sys_openat fs/open.c:1464 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1464
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9e4478f6c9
RSP: 002b:00007f9e431c2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9e449e6090 RCX: 00007f9e4478f6c9
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: ffffffffffffff9c
RBP: 00007f9e44811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9e449e6128 R14: 00007f9e449e6090 R15: 00007ffddb7b1678
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:423
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: kauditd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:detach_entity_load_avg+0x19d/0x7b0 kernel/sched/fair.c:4884
Code: 39 f0 44 0f 47 f0 41 80 3c 14 00 74 12 48 89 df e8 58 d1 7d 00 48 ba 00 00 00 00 00 fc ff df 48 8b 45 d0 4c 89 b0 88 00 00 00 <4c> 8d a0 b0 00 00 00 48 8b 45 c8 4c 8d a8 f0 00 00 00 4c 89 e8 48
RSP: 0018:ffffc90000007350 EFLAGS: 00000046
RAX: ffff8881f6f4fb80 RBX: ffff8881f6f4fc08 RCX: 3bd3cc6df3b45f00
RDX: dffffc0000000000 RSI: ffff888149175fc0 RDI: ffff8881f6f4fb80
RBP: ffffc90000007398 R08: 000000000000b960 R09: 1ffff1102922ec13
R10: 0000000000000007 R11: ffff88814917609c R12: 1ffff1103ede9f81
R13: 0000000000000d94 R14: 0000000009d9860c R15: 0000000002e58000
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3342b17d60 CR3: 000000010b742000 CR4: 00000000003526b0
DR0: 000000000000039a DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
update_load_avg+0x1258/0x19a0 kernel/sched/fair.c:4946
dequeue_entity+0x4c4/0x1750 kernel/sched/fair.c:5686
dequeue_entities+0x1bd/0x12f0 kernel/sched/fair.c:7290
dequeue_task_fair+0x2ae/0x690 kernel/sched/fair.c:7387
dequeue_task+0x445/0x8f0 kernel/sched/core.c:2139
deactivate_task+0x37/0x70 kernel/sched/core.c:2225
detach_task+0x213/0x4a0 kernel/sched/fair.c:9757
detach_tasks kernel/sched/fair.c:9893 [inline]
sched_balance_rq+0x34c4/0x5060 kernel/sched/fair.c:12063
sched_balance_domains+0x4b4/0xa10 kernel/sched/fair.c:12495
sched_balance_softirq+0xbd/0x170 kernel/sched/fair.c:13229
handle_softirqs+0x1ab/0x630 kernel/softirq.c:621
__do_softirq kernel/softirq.c:659 [inline]
invoke_softirq kernel/softirq.c:476 [inline]
__irq_exit_rcu+0x48/0xc0 kernel/softirq.c:708
irq_exit_rcu+0xd/0x30 kernel/softirq.c:720
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x82/0x90 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2076 [inline]
RIP: 0010:vprintk_emit+0x530/0x640 kernel/printk/printk.c:2461
Code: 81 e6 00 02 00 00 31 ff e8 cd 2e 1e 00 48 81 e3 00 02 00 00 75 07 e8 df 29 1e 00 eb 06 e8 d8 29 1e 00 fb c6 05 20 b6 31 07 00 42 fd ff ff e8 c6 29 1e 00 e9 a5 fe ff ff 41 ff ce bf 58 89 41
RSP: 0018:ffffc9000025fac0 EFLAGS: 00000293
RAX: ffffffff8167d4d8 RBX: 0000000000000200 RCX: ffff88810367df00
RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffffc9000025fb88 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200004bf48 R12: 1ffff9200004bf5c
R13: 00000000000000ec R14: 0000000000000000 R15: dffffc0000000000
vprintk_default+0x2a/0x40 kernel/printk/printk.c:2477
vprintk+0x93/0xa0 kernel/printk/printk_safe.c:73
_printk+0xd0/0x120 kernel/printk/printk.c:2487
kauditd_printk_skb kernel/audit.c:546 [inline]
kauditd_hold_skb+0x1cc/0x230 kernel/audit.c:581
kauditd_send_queue+0x2c2/0x310 kernel/audit.c:766
kauditd_thread+0x4f0/0x740 kernel/audit.c:890
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244