INFO: task udevd:112 blocked for more than 122 seconds.
      Not tainted 6.12.23-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D
 stack:0     pid:112   tgid:112   ppid:1      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:6859
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x755/0x10d0 kernel/locking/mutex.c:752
 __mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1040
 mutex_lock+0xd9/0xf0 kernel/locking/mutex.c:286
 device_lock include/linux/device.h:1014 [inline]
 uevent_show+0x1d6/0x3a0 drivers/base/core.c:2730
 dev_attr_show+0x69/0xe0 drivers/base/core.c:2424
 sysfs_kf_seq_show+0x286/0x3a0 fs/sysfs/file.c:59
 kernfs_seq_show+0x125/0x180 fs/kernfs/file.c:205
 seq_read_iter+0x55c/0xf10 fs/seq_file.c:230
 kernfs_fop_read_iter+0x151/0x4f0 fs/kernfs/file.c:279
 new_sync_read fs/read_write.c:488 [inline]
 vfs_read+0x53d/0xb60 fs/read_write.c:569
 ksys_read+0x141/0x250 fs/read_write.c:712
 __do_sys_read fs/read_write.c:722 [inline]
 __se_sys_read fs/read_write.c:720 [inline]
 __x64_sys_read+0x7f/0x90 fs/read_write.c:720
 x64_sys_call+0x2638/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:1
 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: 0033:0x7f2aec6a7407
RSP: 002b:00007fff29dfc920 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f2aecdcb880 RCX: 00007f2aec6a7407
RDX: 0000000000001000 RSI: 000055e761bbb700 RDI: 000000000000000c
RBP: 00007f2aec7efff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
R13: 00007f2aec7efea0 R14: 0000000000000000 R15: 000055e761b39580
 </TASK>
INFO: task syz.5.16:476 blocked for more than 126 seconds.
      Not tainted 6.12.23-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.16        state:D stack:0     pid:476   tgid:476   ppid:458    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_timeout+0xb2/0x300 kernel/time/timer.c:2592
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
 __flush_work+0x56f/0x6e0 kernel/workqueue.c:4221
 __cancel_work_sync kernel/workqueue.c:4341 [inline]
 cancel_work_sync+0xac/0xe0 kernel/workqueue.c:4378
 uhid_dev_destroy drivers/hid/uhid.c:584 [inline]
 uhid_char_release+0xa7/0x600 drivers/hid/uhid.c:662
 __fput+0x1fb/0xa00 fs/file_table.c:431
 ____fput+0x20/0x30 fs/file_table.c:459
 task_work_run+0x1e0/0x250 kernel/task_work.c:239
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9b1a38e929
RSP: 002b:00007ffd7cc155f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000000e9d2 RCX: 00007f9b1a38e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f9b1a5b7ba0 R08: 0000000000000001 R09: 000000037cc158ef
R10: 00007f9b1a200000 R11: 0000000000000246 R12: 00007f9b1a5b5fac
R13: 00007f9b1a5b5fa0 R14: ffffffffffffffff R15: 00007ffd7cc15710
 </TASK>
INFO: task syz.1.17:479 blocked for more than 130 seconds.
      Not tainted 6.12.23-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.17        state:D stack:0     pid:479   tgid:479   ppid:460    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_timeout+0xb2/0x300 kernel/time/timer.c:2592
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
 __flush_work+0x56f/0x6e0 kernel/workqueue.c:4221
 __cancel_work_sync kernel/workqueue.c:4341 [inline]
 cancel_work_sync+0xac/0xe0 kernel/workqueue.c:4378
 uhid_dev_destroy drivers/hid/uhid.c:584 [inline]
 uhid_char_release+0xa7/0x600 drivers/hid/uhid.c:662
 __fput+0x1fb/0xa00 fs/file_table.c:431
 ____fput+0x20/0x30 fs/file_table.c:459
 task_work_run+0x1e0/0x250 kernel/task_work.c:239
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fbca218e929
RSP: 002b:00007ffe7223f5e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000000ea7f RCX: 00007fbca218e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fbca23b7ba0 R08: 0000000000000001 R09: 000000037223f8df
R10: 00007fbca2000000 R11: 0000000000000246 R12: 00007fbca23b5fac
R13: 00007fbca23b5fa0 R14: ffffffffffffffff R15: 00007ffe7223f700
 </TASK>
INFO: task syz.3.20:482 blocked for more than 131 seconds.
      Not tainted 6.12.23-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20        state:D stack:0     pid:482   tgid:482   ppid:463    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_timeout+0xb2/0x300 kernel/time/timer.c:2592
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
 __flush_work+0x56f/0x6e0 kernel/workqueue.c:4221
 __cancel_work_sync kernel/workqueue.c:4341 [inline]
 cancel_work_sync+0xac/0xe0 kernel/workqueue.c:4378
 uhid_dev_destroy drivers/hid/uhid.c:584 [inline]
 uhid_char_release+0xa7/0x600 drivers/hid/uhid.c:662
 __fput+0x1fb/0xa00 fs/file_table.c:431
 ____fput+0x20/0x30 fs/file_table.c:459
 task_work_run+0x1e0/0x250 kernel/task_work.c:239
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f548618e929
RSP: 002b:00007fff81a805c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000000ea87 RCX: 00007f548618e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f54863b7ba0 R08: 0000000000000001 R09: 0000000381a808bf
R10: 00007f5486000000 R11: 0000000000000246 R12: 00007f54863b5fac
R13: 00007f54863b5fa0 R14: ffffffffffffffff R15: 00007fff81a806e0
 </TASK>
INFO: task syz.2.18:484 blocked for more than 132 seconds.
      Not tainted 6.12.23-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.18        state:D stack:0     pid:484   tgid:484   ppid:461    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5332 [inline]
 __schedule+0xda5/0x1780 kernel/sched/core.c:6710
 __schedule_loop kernel/sched/core.c:6787 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:6802
 schedule_timeout+0xb2/0x300 kernel/time/timer.c:2592
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
 __flush_work+0x56f/0x6e0 kernel/workqueue.c:4221
 __cancel_work_sync kernel/workqueue.c:4341 [inline]
 cancel_work_sync+0xac/0xe0 kernel/workqueue.c:4378
 uhid_dev_destroy drivers/hid/uhid.c:584 [inline]
 uhid_char_release+0xa7/0x600 drivers/hid/uhid.c:662
 __fput+0x1fb/0xa00 fs/file_table.c:431
 ____fput+0x20/0x30 fs/file_table.c:459
 task_work_run+0x1e0/0x250 kernel/task_work.c:239
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f936718e929
RSP: 002b:00007fff3686fb38 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000000eaa9 RCX: 00007f936718e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f93673b7ba0 R08: 0000000000000001 R09: 000000033686fe2f
R10: 00007f9367000000 R11: 0000000000000246 R12: 00007f93673b5fac
R13: 00007f93673b5fa0 R14: ffffffffffffffff R15: 00007fff3686fc50
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.23-syzkaller #0 83347ed0535b8bb43a19ce30b057b344bf1334dc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:223 [inline]
 watchdog+0xbd4/0xc20 kernel/hung_task.c:379
 kthread+0x2c7/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 369 Comm: kworker/1:3 Not tainted 6.12.23-syzkaller #0 83347ed0535b8bb43a19ce30b057b344bf1334dc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events uhid_device_add_worker
RIP: 0010:unwind_next_frame+0x30a/0x750 arch/x86/kernel/unwind_frame.c:305
Code: 10 00 74 08 48 89 df e8 b4 f4 8f 00 48 c7 03 00 00 00 00 b0 01 e9 a4 02 00 00 4c 8d 6b 50 4d 89 ee 49 c1 ee 03 41 80 3c 16 00 <74> 12 4c 89 ef e8 6c f3 8f 00 48 ba 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffffc90000230848 EFLAGS: 00000046
RAX: ffffc90001367f30 RBX: ffffc900002308c8 RCX: 0000000000230900
RDX: dffffc0000000000 RSI: ffffffff83d013bb RDI: ffffc90001367f48
RBP: ffffc900002308b8 R08: ffffc90000230990 R09: ffffc90000230988
R10: 0000000000000020 R11: ffffffff81664880 R12: 0000000000000000
R13: ffffc90000230918 R14: 1ffff92000046123 R15: ffffc90001367c10
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001280 CR3: 0000000006aa8000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 arch_stack_walk+0x139/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9d/0xe0 kernel/stacktrace.c:122
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xb2/0xd0 mm/kasan/generic.c:541
 kasan_record_aux_stack_noalloc+0xf/0x20 mm/kasan/generic.c:551
 insert_work+0x34/0x250 kernel/workqueue.c:2183
 __queue_work+0xa08/0xdb0 kernel/workqueue.c:2343
 delayed_work_timer_fn+0x65/0x90 kernel/workqueue.c:2485
 call_timer_fn+0x49/0x300 kernel/time/timer.c:1794
 expire_timers kernel/time/timer.c:1840 [inline]
 __run_timers kernel/time/timer.c:2419 [inline]
 __run_timer_base+0x6df/0x9a0 kernel/time/timer.c:2431
 run_timer_base kernel/time/timer.c:2440 [inline]
 run_timer_softirq+0x35/0x70 kernel/time/timer.c:2450
 handle_softirqs+0x169/0x500 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0x48/0xc0 kernel/softirq.c:644
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:656
 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:2048 [inline]
RIP: 0010:vprintk_emit+0x51d/0x620 kernel/printk/printk.c:2406
Code: 81 e6 00 02 00 00 31 ff e8 10 c9 1c 00 48 81 e3 00 02 00 00 75 07 e8 22 c4 1c 00 eb 06 e8 1b c4 1c 00 fb c6 05 e3 76 aa 06 00 <e9> 42 fd ff ff e8 09 c4 1c 00 e9 a5 fe ff ff 41 ff ce bf 58 89 41
RSP: 0018:ffffc90001367200 EFLAGS: 00000293
RAX: ffffffff815a81b5 RBX: 0000000000000200 RCX: ffff888130470000
RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffffc900013672d0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200026ce30 R12: 1ffff9200026ce44
R13: 000000000000003a R14: 0000000000000000 R15: dffffc0000000000
 dev_vprintk_emit+0x338/0x3f0 drivers/base/core.c:4936
 dev_printk_emit+0xe1/0x130 drivers/base/core.c:4947
 __dev_printk+0x179/0x1b0 drivers/base/core.c:4959
 _dev_warn+0x10b/0x160 drivers/base/core.c:5003
 hid_parser_main+0x8de/0xcc0 drivers/hid/hid-core.c:632
 hid_open_report+0x9c5/0x1060 drivers/hid/hid-core.c:1278
 hid_parse include/linux/hid.h:1123 [inline]
 hid_generic_probe+0x42/0x90 drivers/hid/hid-generic.c:66
 __hid_device_probe drivers/hid/hid-core.c:2702 [inline]
 hid_device_probe+0x2b5/0x5d0 drivers/hid/hid-core.c:2739
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2ca/0x870 drivers/base/dd.c:658
 __driver_probe_device+0x195/0x280 drivers/base/dd.c:800
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:830
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:958
 bus_for_each_drv+0x25c/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2b7/0x3a0 drivers/base/dd.c:1030
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1079
 bus_probe_device+0x188/0x270 drivers/base/bus.c:534
 device_add+0x82a/0xb60 drivers/base/core.c:3666
 hid_add_device+0x39b/0x560 drivers/hid/hid-core.c:2885
 uhid_device_add_worker+0x49/0xf0 drivers/hid/uhid.c:73
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3310
 worker_thread+0x99f/0xd90 kernel/workqueue.c:3391
 kthread+0x2c7/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>