INFO: task kworker/1:14:27047 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:14    state:D stack:21304 pid:27047 tgid:27047 ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5504 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
 __schedule_loop kernel/sched/core.c:7307 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7322
 usb_kill_urb+0x1cf/0x2f0 drivers/usb/core/urb.c:717
 usb_start_wait_urb+0x22a/0x5b0 drivers/usb/core/message.c:74
 usb_internal_control_msg drivers/usb/core/message.c:117 [inline]
 usb_control_msg+0x234/0x3e0 drivers/usb/core/message.c:167
 get_bMaxPacketSize0 drivers/usb/core/hub.c:4851 [inline]
 hub_port_init+0xb0b/0x28c0 drivers/usb/core/hub.c:5047
 hub_port_connect drivers/usb/core/hub.c:5496 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x24e8/0x4d30 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9087 Comm: dhcpcd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:blkcg_css+0x0/0x1d0 block/blk-cgroup.c:105
Code: 89 f7 e8 13 4c 95 fd e9 3f fb ff ff 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 53 e8 05 cb 27 fd e8 40 eb f1 fc 48 85 c0 74 10 48
RSP: 0000:ffffc90002f17a28 EFLAGS: 00000293
RAX: ffffffff849e8c16 RBX: ffffffff849e8bcd RCX: ffff8880b3fa5d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff206357f R12: 000000000000bd95
R13: ffffea0002b211c0 R14: 00000000000b2438 R15: ffffc90002f17db0
FS:  00007f744042e780(0000) GS:ffff888125253000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f74403fc080 CR3: 00000000a3f08000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 blk_cgroup_congested+0xbc/0x210 block/blk-cgroup.c:2204
 __folio_throttle_swaprate+0x3c/0x140 mm/swapfile.c:3890
 folio_throttle_swaprate include/linux/swap.h:567 [inline]
 folio_prealloc mm/memory.c:1218 [inline]
 wp_page_copy mm/memory.c:3875 [inline]
 do_wp_page+0x1254/0x4c70 mm/memory.c:4336
 handle_pte_fault mm/memory.c:6395 [inline]
 __handle_mm_fault mm/memory.c:6517 [inline]
 handle_mm_fault+0x1490/0x3080 mm/memory.c:6686
 do_user_addr_fault+0xa4d/0x1340 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f74403d852c
Code: 1e fa 80 3d 75 3b 02 00 00 75 2b 55 48 83 3d b2 3a 02 00 00 48 89 e5 74 0c 48 8b 3d de 3a 02 00 e8 69 fa ff ff e8 64 ff ff ff <c6> 05 4d 3b 02 00 01 5d c3 0f 1f 00 c3 0f 1f 80 00 00 00 00 f3 0f
RSP: 002b:00007ffe96db7850 EFLAGS: 00010246
RAX: 00007f74403fc068 RBX: 00007f74403fb4d0 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007f74403fc068
RBP: 00007ffe96db7850 R08: 0000000000000007 R09: 0000000000000001
R10: 00007ffe96db78b0 R11: 00007ffe96db7950 R12: 00007f74403fb4d0
R13: 0000000000000004 R14: 0000000000000004 R15: 0000000000000000
 </TASK>