INFO: task syz.4.18:379 blocked for more than 122 seconds.
Not tainted 6.12.23-syzkaller-g30b14cdad458 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.18 state:D
stack:0 pid:379 tgid:379 ppid:375 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
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+0x6d2/0xac0 kernel/workqueue.c:4233
__cancel_work_sync kernel/workqueue.c:4354 [inline]
cancel_work_sync+0xac/0xe0 kernel/workqueue.c:4391
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:240
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: 0033:0x7f6224f8e929
RSP: 002b:00007ffc0ce49868 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000002e561 RCX: 00007f6224f8e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000001 R09: 000000030ce49b5f
R10: 00007f6224e00000 R11: 0000000000000246 R12: 00007f62251b5fac
R13: 00007f62251b5fa0 R14: ffffffffffffffff R15: 0000000000000003
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.23-syzkaller-g30b14cdad458 #0 c708c6bafa1314b3e84c64b9f03b67766970ebbd
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:229 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:385
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 71 Comm: kworker/1:2 Not tainted 6.12.23-syzkaller-g30b14cdad458 #0 c708c6bafa1314b3e84c64b9f03b67766970ebbd
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events uhid_device_add_worker
RIP: 0010:memcpy_orig+0x68/0x150 arch/x86/lib/memcpy_64.S:95
Code: 5f 18 48 8d 7f 20 73 d4 83 c2 20 eb 4c 48 01 d6 48 01 d7 48 83 ea 20 66 2e 0f 1f 84 00 00 00 00 00 90 48 83 ea 20 4c 8b 46 f8 <4c> 8b 4e f0 4c 8b 56 e8 4c 8b 5e e0 48 8d 76 e0 4c 89 47 f8 4c 89
RSP: 0018:ffffc90000d9ebe0 EFLAGS: 00000287
RAX: ffffffff8897ac20 RBX: 000000000000003a RCX: ffffffff8168bc0a
RDX: fffffffffffffffa RSI: ffffffff88969322 RDI: ffffffff8897ac5a
RBP: ffffc90000d9ec10 R08: 3078302067617420 R09: 1ffffffff112f58b
R10: dffffc0000000000 R11: fffffbfff112f58c R12: 0000000000000000
R13: ffffffff8168bc0a R14: ffffffff889692e8 R15: ffffffff8897ac20
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555deb94a8 CR3: 0000000109fb4000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
copy_data kernel/printk/printk_ringbuffer.c:1851 [inline]
prb_read kernel/printk/printk_ringbuffer.c:1936 [inline]
_prb_read_valid+0x7ca/0xa90 kernel/printk/printk_ringbuffer.c:2113
prb_read_valid+0x41/0x80 kernel/printk/printk_ringbuffer.c:2185
printk_get_next_message+0x168/0x930 kernel/printk/printk.c:3005
console_emit_next_record kernel/printk/printk.c:3088 [inline]
console_flush_all+0x3a4/0xaa0 kernel/printk/printk.c:3222
__console_flush_and_unlock kernel/printk/printk.c:3281 [inline]
console_unlock+0xe9/0x270 kernel/printk/printk.c:3321
vprintk_emit+0x27c/0x640 kernel/printk/printk.c:2443
dev_vprintk_emit+0x33b/0x400 drivers/base/core.c:4936
dev_printk_emit+0xe1/0x130 drivers/base/core.c:4947
__dev_printk+0x17f/0x1b0 drivers/base/core.c:4959
_dev_warn+0x10b/0x160 drivers/base/core.c:5003
hid_parser_main+0x84b/0xdc0 drivers/hid/hid-core.c:632
hid_open_report+0x868/0x1110 drivers/hid/hid-core.c:1278
hid_parse include/linux/hid.h:1137 [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+0x2c1/0x5d0 drivers/hid/hid-core.c:2739
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2d3/0x890 drivers/base/dd.c:658
__driver_probe_device+0x198/0x280 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+0x25d/0x2f0 drivers/base/bus.c:459
__device_attach+0x2bd/0x3a0 drivers/base/dd.c:1030
device_initial_probe+0x1e/0x30 drivers/base/dd.c:1079
bus_probe_device+0x18b/0x270 drivers/base/bus.c:534
device_add+0x80c/0xc00 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:3238 [inline]
process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244