INFO: task syz.3.6984:21519 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.6984      state:D stack:0     pid:21519 tgid:21518 ppid:18285  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
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:938 [inline]
 __se_sys_quotactl+0x308/0x7d0 fs/quota/quota.c:917
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:917
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 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: 0033:0x7f6b3218f6c9
RSP: 002b:00007f6b330df038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f6b323e5fa0 RCX: 00007f6b3218f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f6b32211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b323e6038 R14: 00007f6b323e5fa0 R15: 00007fffc7b0ef28
 </TASK>
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:
 <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+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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 331 Comm: kworker/0:2 Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 70 05 48 89 de e8 10 5f 52 00 5b 5d e9 c9 bc 09 04 cc cc cc cc cc cc cc cc cc b8 32 04 01 6e 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 48 89 e5 48 8b 45 08 65 48 8b 0c 25 00 eb 04 00 65
RSP: 0018:ffffc9000b8ce8c0 EFLAGS: 00000206
RAX: ffffffff8589d0ae RBX: 00000000000000fb RCX: 0000000000000002
RDX: ffff88810b78cc00 RSI: 00000000000000fb RDI: 00000000000000f6
RBP: ffffc9000b8ce938 R08: ffff88810b78cc00 R09: 0000000000000005
R10: 0000000000000030 R11: 0000000000000002 R12: 0000000000000000
R13: 1ffffffff0b9240c R14: ffffffff85c92062 R15: 0000000000000035
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f629b7ffecc CR3: 0000000158cea000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 vsnprintf+0xe6/0x1aa0 lib/vsprintf.c:2755
 sprintf+0xda/0x120 lib/vsprintf.c:3007
 print_time kernel/printk/printk.c:1387 [inline]
 info_print_prefix+0x183/0x480 kernel/printk/printk.c:1416
 record_print_text+0x155/0x430 kernel/printk/printk.c:1465
 printk_get_next_message+0x273/0x930 kernel/printk/printk.c:3037
 console_emit_next_record kernel/printk/printk.c:3105 [inline]
 console_flush_all+0x3a4/0xaa0 kernel/printk/printk.c:3239
 __console_flush_and_unlock kernel/printk/printk.c:3298 [inline]
 console_unlock+0xe9/0x270 kernel/printk/printk.c:3338
 vprintk_emit+0x27c/0x640 kernel/printk/printk.c:2462
 dev_vprintk_emit+0x33b/0x400 drivers/base/core.c:4962
 dev_printk_emit+0xe1/0x130 drivers/base/core.c:4973
 __dev_printk+0x17f/0x1b0 drivers/base/core.c:4985
 _dev_notice+0x10b/0x170 drivers/base/core.c:5030
 usb_parse_endpoint drivers/usb/core/config.c:460 [inline]
 usb_parse_interface drivers/usb/core/config.c:600 [inline]
 usb_parse_configuration drivers/usb/core/config.c:813 [inline]
 usb_get_configuration+0x2ea1/0x5000 drivers/usb/core/config.c:962
 usb_enumerate_device drivers/usb/core/hub.c:2522 [inline]
 usb_new_device+0x146/0x1590 drivers/usb/core/hub.c:2660
 hub_port_connect drivers/usb/core/hub.c:5561 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5701 [inline]
 port_event drivers/usb/core/hub.c:5865 [inline]
 hub_event+0x2c81/0x4270 drivers/usb/core/hub.c:5947
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3319
 worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
 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
 </TASK>