INFO: task syz.9.2154:7025 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.2154      state:D stack:0     pid:7025  tgid:7024  ppid:3606   flags:0x00004004
Call Trace:
 <TASK>
 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
 super_lock+0x150/0x300 fs/super.c:115
 super_lock_shared fs/super.c:140 [inline]
 iterate_supers+0x8a/0x560 fs/super.c:934
 ksys_sync+0x95/0x160 fs/sync.c:103
 __ia32_sys_sync+0x12/0x20 fs/sync.c:114
 x64_sys_call+0x2a58/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:163
 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: 0033:0x7f319598eba9
RSP: 002b:00007f31967f1038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f3195bd5fa0 RCX: 00007f319598eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f3195bd5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3195bd6038 R14: 00007f3195bd5fa0 R15: 00007ffe496218d8
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 99624267b8d9de82d7af71289de6516dc5649427
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 __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+0x2c7/0x370 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
 </TASK>
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 99624267b8d9de82d7af71289de6516dc5649427
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__list_add include/linux/list.h:150 [inline]
RIP: 0010:list_add include/linux/list.h:169 [inline]
RIP: 0010:detach_tasks kernel/sched/fair.c:9912 [inline]
RIP: 0010:sched_balance_rq+0x34e1/0x5060 kernel/sched/fair.c:12081
Code: 48 8d b4 24 d0 03 00 00 e8 4c 3f 00 00 48 8b 9c 24 28 04 00 00 4c 89 ef 48 8b b4 24 b0 00 00 00 48 89 da e8 91 1f 4f 01 84 c0 <4c> 8b 74 24 78 74 71 4c 8d 7b 08 4c 89 f8 48 c1 e8 03 42 80 3c 20
RSP: 0018:ffffc90000007920 EFLAGS: 00000002
RAX: 1ffff92000000f01 RBX: ffff88810eb33a00 RCX: c90a5bdf71106000
RDX: ffff88810eb33a00 RSI: ffffc90000007d48 RDI: ffff888125006000
RBP: ffffc90000007dd0 R08: ffff888130b6e4c7 R09: 1ffff1102616dc98
R10: 0000000000000000 R11: ffffffff815e5a70 R12: dffffc0000000000
R13: ffff888125006000 R14: ffff888130c5f4a0 R15: ffff8881f6f50728
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3693507d60 CR3: 00000000072a8000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 000000000000003b DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 sched_balance_domains+0x4b4/0xa10 kernel/sched/fair.c:12507
 sched_balance_softirq+0xbd/0x170 kernel/sched/fair.c:13234
 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
 </IRQ>
 <TASK>
 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:2462
Code: 81 e6 00 02 00 00 31 ff e8 0d 21 1e 00 48 81 e3 00 02 00 00 75 07 e8 1f 1c 1e 00 eb 06 e8 18 1c 1e 00 fb c6 05 00 93 31 07 00 <e9> 42 fd ff ff e8 06 1c 1e 00 e9 a5 fe ff ff 41 ff ce bf 58 89 41
RSP: 0018:ffffc9000025fac0 EFLAGS: 00000293
RAX: ffffffff8167c7f8 RBX: 0000000000000200 RCX: ffff888103678000
RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffffc9000025fb88 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200004bf48 R12: 1ffff9200004bf5c
R13: 00000000000000ef R14: 0000000000000000 R15: dffffc0000000000
 vprintk_default+0x2a/0x40 kernel/printk/printk.c:2478
 vprintk+0x93/0xa0 kernel/printk/printk_safe.c:73
 _printk+0xd0/0x120 kernel/printk/printk.c:2488
 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+0x2c7/0x370 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
 </TASK>