INFO: task syz.3.310:1391 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.310 state:D stack:0 pid:1391 tgid:1390 ppid:291 flags:0x00000004
Call Trace:
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
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7944
__mutex_lock_common kernel/locking/mutex.c:707 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:803
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:285
device_lock include/linux/device.h:908 [inline]
usbdev_open+0x171/0x840 drivers/usb/core/devio.c:1051
chrdev_open+0x4de/0x5f0 fs/char_dev.c:414
do_dentry_open+0x978/0x1510 fs/open.c:960
vfs_open+0x86/0x230 fs/open.c:1090
do_open fs/namei.c:3774 [inline]
path_openat+0x2b6c/0x34b0 fs/namei.c:3933
do_filp_open+0x1c6/0x3e0 fs/namei.c:3960
do_sys_openat2+0x12c/0x1c0 fs/open.c:1438
do_sys_open fs/open.c:1453 [inline]
__do_sys_openat fs/open.c:1469 [inline]
__se_sys_openat fs/open.c:1464 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1464
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
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: 0033:0x7fdf7cd8d510
RSP: 002b:00007fdf7dce5b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000000a401 RCX: 00007fdf7cd8d510
RDX: 000000000000a401 RSI: 00007fdf7dce5c10 RDI: 00000000ffffff9c
RBP: 00007fdf7dce5c10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: cccccccccccccccd
R13: 00007fdf7cfd6038 R14: 00007fdf7cfd5fa0 R15: 00007ffd70a7d988
INFO: task syz.3.310:1392 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.310 state:D stack:0 pid:1392 tgid:1390 ppid:291 flags:0x00000004
Call Trace:
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
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7944
__mutex_lock_common kernel/locking/mutex.c:707 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:803
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:285
device_lock include/linux/device.h:908 [inline]
usbdev_open+0x171/0x840 drivers/usb/core/devio.c:1051
chrdev_open+0x4de/0x5f0 fs/char_dev.c:414
do_dentry_open+0x978/0x1510 fs/open.c:960
vfs_open+0x86/0x230 fs/open.c:1090
do_open fs/namei.c:3774 [inline]
path_openat+0x2b6c/0x34b0 fs/namei.c:3933
do_filp_open+0x1c6/0x3e0 fs/namei.c:3960
do_sys_openat2+0x12c/0x1c0 fs/open.c:1438
do_sys_open fs/open.c:1453 [inline]
__do_sys_openat fs/open.c:1469 [inline]
__se_sys_openat fs/open.c:1464 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1464
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
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: 0033:0x7fdf7cd8d510
RSP: 002b:00007fdf7dcc4b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000000a401 RCX: 00007fdf7cd8d510
RDX: 000000000000a401 RSI: 00007fdf7dcc4c10 RDI: 00000000ffffff9c
RBP: 00007fdf7dcc4c10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: cccccccccccccccd
R13: 00007fdf7cfd6128 R14: 00007fdf7cfd6090 R15: 00007ffd70a7d988
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 fee5265d319350b22cf00991634aaaf1de34201c
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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: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
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 332 Comm: kworker/1:3 Not tainted syzkaller #0 fee5265d319350b22cf00991634aaaf1de34201c
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:psi_ttwu_dequeue kernel/sched/stats.h:207 [inline]
RIP: 0010:try_to_wake_up+0x17c1/0x1b00 kernel/sched/core.c:4839
Code: 28 00 74 08 4c 89 f7 e8 2d 88 80 00 49 8b 3e 48 89 de e8 02 2b 09 00 4d 89 fd e9 4e f3 ff ff f3 0f 1e fa 4c 8d b3 68 0a 00 00 <4d> 89 f5 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df 41 0f b6 44 05
RSP: 0018:ffffc90000230c90 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888103651300 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff87cb0ce8
RBP: ffffc90000230d30 R08: ffffffff87cb0cef R09: 1ffffffff0f9619d
R10: dffffc0000000000 R11: fffffbfff0f9619e R12: ffff888103651900
R13: ffff888103651314 R14: ffff888103651d68 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc8efb5f88 CR3: 000000010a268000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
wake_up_process+0x14/0x20 kernel/sched/core.c:4980
process_timeout+0x3c/0x50 kernel/time/timer.c:2546
call_timer_fn+0x49/0x300 kernel/time/timer.c:1797
expire_timers kernel/time/timer.c:1848 [inline]
__run_timers kernel/time/timer.c:2422 [inline]
__run_timer_base+0x6b3/0x9a0 kernel/time/timer.c:2434
run_timer_base kernel/time/timer.c:2443 [inline]
run_timer_softirq+0x35/0x70 kernel/time/timer.c:2453
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
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 42 fd ff ff e8 06 1c 1e 00 e9 a5 fe ff ff 41 ff ce bf 58 89 41
RSP: 0018:ffffc9000b92e7e0 EFLAGS: 00000246
RAX: ffffffff8167c7f8 RBX: 0000000000000200 RCX: 0000000000100000
RDX: ffffc9000c501000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc9000b92e8b0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001725cec R12: 1ffff92001725d00
R13: 0000000000000057 R14: 0000000000000000 R15: dffffc0000000000
dev_vprintk_emit+0x33b/0x400 drivers/base/core.c:4962
dev_printk_emit+0xe1/0x130 drivers/base/core.c:4973
__netdev_printk+0x3f2/0x4e0 net/core/dev.c:11899
netdev_err+0x10b/0x170 net/core/dev.c:11951
asix_set_sw_mii drivers/net/usb/asix_common.c:78 [inline]
asix_check_host_enable drivers/net/usb/asix_common.c:98 [inline]
__asix_mdio_read drivers/net/usb/asix_common.c:484 [inline]
asix_mdio_read+0x20a/0x4b0 drivers/net/usb/asix_common.c:507
asix_phy_reset+0xcc/0x1d0 drivers/net/usb/asix_devices.c:215
ax88172_bind+0x3f1/0x590 drivers/net/usb/asix_devices.c:275
usbnet_probe+0x9aa/0x2850 drivers/net/usb/usbnet.c:1772
usb_probe_interface+0x693/0xc00 drivers/usb/core/driver.c:403
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2d6/0x890 drivers/base/dd.c:657
__driver_probe_device+0x198/0x280 drivers/base/dd.c:799
driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
__device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
bus_for_each_drv+0x25d/0x2f0 drivers/base/bus.c:459
__device_attach+0x2bd/0x3a0 drivers/base/dd.c:1029
device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
bus_probe_device+0x18b/0x270 drivers/base/bus.c:534
device_add+0x80c/0xc00 drivers/base/core.c:3692
usb_set_configuration+0x1ad4/0x20b0 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x95/0x160 drivers/usb/core/generic.c:254
usb_probe_device+0x1d1/0x380 drivers/usb/core/driver.c:298
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2d6/0x890 drivers/base/dd.c:657
__driver_probe_device+0x198/0x280 drivers/base/dd.c:799
driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
__device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
bus_for_each_drv+0x25d/0x2f0 drivers/base/bus.c:459
__device_attach+0x2bd/0x3a0 drivers/base/dd.c:1029
device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
bus_probe_device+0x18b/0x270 drivers/base/bus.c:534
device_add+0x80c/0xc00 drivers/base/core.c:3692
usb_new_device+0x9ed/0x1590 drivers/usb/core/hub.c:2690
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+0x7d5/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
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