rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1):
P29/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=37341, q=673 ncpus=2)
task:kworker/1:1 state:R
running task stack:21592 pid:29 tgid:29 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7238
irqentry_exit+0x176/0x650 kernel/entry/common.c:239
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0x40/0x320 kernel/locking/lockdep.c:5879
Code: 2d ed 82 2a 12 48 89 6c 24 10 48 89 f5 0f 1f 44 00 00 65 8b 05 05 83 2a 12 83 f8 07 0f 87 1d 02 00 00 48 0f a3 05 d0 5c f5 0e <0f> 82 18 02 00 00 44 8b 05 97 90 f5 0e 45 85 c0 0f 84 48 01 00 00
RSP: 0018:ffffc90000a46638 EFLAGS: 00000297
RAX: 0000000000000001 RBX: ffffffff8e7e6b20 RCX: ffffffff91896401
RDX: 0000000000000000 RSI: ffffffff81b8103e RDI: ffffffff8e7e6b20
RBP: ffffffff81b8103e R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000018a27 R12: ffffc90000a46740
R13: ffffc90000a466f0 R14: ffffc90000a46f20 R15: ffffc90000a46724
rcu_lock_release include/linux/rcupdate.h:319 [inline]
rcu_read_unlock include/linux/rcupdate.h:878 [inline]
class_rcu_destructor include/linux/rcupdate.h:1190 [inline]
unwind_next_frame+0x3c3/0x1ea0 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4538 [inline]
slab_alloc_node mm/slub.c:4866 [inline]
kmem_cache_alloc_noprof+0x241/0x6e0 mm/slub.c:4873
__kernfs_new_node+0xd2/0x9f0 fs/kernfs/dir.c:664
kernfs_new_node+0x11b/0x1a0 fs/kernfs/dir.c:748
__kernfs_create_file+0x53/0x350 fs/kernfs/file.c:1057
sysfs_add_file_mode_ns+0x207/0x3c0 fs/sysfs/file.c:313
sysfs_create_file_ns+0x145/0x1e0 fs/sysfs/file.c:374
sysfs_create_file include/linux/sysfs.h:774 [inline]
device_create_file+0xf2/0x1d0 drivers/base/core.c:3056
device_add+0x2cb/0x1950 drivers/base/core.c:3638
cdev_device_add+0x12b/0x270 fs/char_dev.c:553
evdev_connect+0x3a8/0x4b0 drivers/input/evdev.c:1383
input_attach_handler.isra.0+0x177/0x1e0 drivers/input/input.c:994
input_register_device.cold+0x139/0x375 drivers/input/input.c:2378
usb_probe+0x1226/0x17c0 drivers/input/misc/yealink.c:928
usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:631 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:709
__driver_probe_device+0x1de/0x400 drivers/base/dd.c:851
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:881
__device_attach_driver+0x1df/0x340 drivers/base/dd.c:1009
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4d0 drivers/base/dd.c:1081
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1136
bus_probe_device+0x64/0x160 drivers/base/bus.c:613
device_add+0x11d9/0x1950 drivers/base/core.c:3691
usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2266
usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:631 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:709
__driver_probe_device+0x1de/0x400 drivers/base/dd.c:851
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:881
__device_attach_driver+0x1df/0x340 drivers/base/dd.c:1009
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4d0 drivers/base/dd.c:1081
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1136
bus_probe_device+0x64/0x160 drivers/base/bus.c:613
device_add+0x11d9/0x1950 drivers/base/core.c:3691
usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695
hub_port_connect drivers/usb/core/hub.c:5567 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953
process_one_work+0xa23/0x19a0 kernel/workqueue.c:3288
process_scheduled_works kernel/workqueue.c:3371 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3452
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: rcu_preempt kthread starved for 8007 jiffies! g37341 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27832 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: f7 80 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 1f 19 00 fb f4 cc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff8e407e00 EFLAGS: 00000242
RAX: 00000000018e5e79 RBX: ffffffff8e4975c0 RCX: ffffffff8b926d45
RDX: 0000000000000000 RSI: ffffffff8de8208a RDI: ffffffff8c1b62a0
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed101708679d
R10: ffff8880b8433ceb R11: 0000000000000000 R12: 0000000000000000
R13: fffffbfff1c92eb8 R14: 0000000000000000 R15: ffffffff90da2a10
FS: 0000000000000000(0000) GS:ffff88812432b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d2dd012168 CR3: 0000000035d2a000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:73 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x464/0x590 kernel/sched/idle.c:352
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:451
rest_init+0x251/0x260 init/main.c:761
start_kernel+0x47f/0x480 init/main.c:1218
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
sched: DL replenish lagged too much