rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: (detected by 0, t=10502 jiffies, g=17121, q=726 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10468 (4294962401-4294951933), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10468 jiffies! g17121 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:25824 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6785
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5949 Comm: kworker/1:3 Not tainted 6.12.0-syzkaller-g158f238aa69d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: events request_firmware_work_func
RIP: 0010:validate_chain+0x98/0x5920 kernel/locking/lockdep.c:3860
Code: 00 01 00 00 48 c1 e9 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4a 89 04 21 48 b8 f2 f2 f2 00 f2 f2 f2 00 4a 89 44 21 09 4a 89 44 21 11 <48> b8 f2 f2 f2 f2 f2 00 00 00 4a 89 44 21 1f 48 b8 f2 f2 f2 f2 f2
RSP: 0018:ffffc90000a17c00 EFLAGS: 00000016
RAX: 00f2f2f200f2f2f2 RBX: ffffffff93c56700 RCX: 1ffff92000142fa0
RDX: 0000000000000000 RSI: ffff88807ab7e5a8 RDI: ffff88807ab7da00
RBP: ffffc90000a17f00 R08: ffffffff942de807 R09: 1ffffffff285bd00
R10: dffffc0000000000 R11: fffffbfff285bd01 R12: dffffc0000000000
R13: ffff88807ab7e4d8 R14: 85717cd1a9d53819 R15: ffff88807ab7e5c8
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3295ffff CR3: 0000000027d3c000 CR4: 0000000000350ef0
Call Trace:
__lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
debug_objects_fill_pool+0xa0/0x9f0 lib/debugobjects.c:614
debug_object_activate+0x135/0x510 lib/debugobjects.c:704
debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
debug_activate kernel/time/hrtimer.c:478 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1085
__hrtimer_start_range_ns kernel/time/hrtimer.c:1260 [inline]
hrtimer_start_range_ns+0xac8/0xca0 kernel/time/hrtimer.c:1302
hrtimer_start include/linux/hrtimer.h:275 [inline]
dummy_urb_enqueue+0x55a/0x780 drivers/usb/gadget/udc/dummy_hcd.c:1309
usb_hcd_submit_urb+0x36e/0x1e80 drivers/usb/core/hcd.c:1533
ath9k_hif_usb_rx_cb+0x11f7/0x1590 drivers/net/wireless/ath/ath9k/hif_usb.c:722
__usb_hcd_giveback_urb+0x42e/0x6e0 drivers/usb/core/hcd.c:1650
dummy_timer+0x856/0x4620 drivers/usb/gadget/udc/dummy_hcd.c:1993
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1755
hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1772
handle_softirqs+0x2c7/0x980 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 ee c9 2b f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 f3 30 90 f5 65 8b 05 f4 c6 30 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900031bf6c0 EFLAGS: 00000206
RAX: 3fde9957fe7b7600 RBX: 1ffff92000637edc RCX: ffffffff8170d1da
RDX: dffffc0000000000 RSI: ffffffff8c0acbe0 RDI: 0000000000000001
RBP: ffffc900031bf758 R08: ffffffff942de837 R09: 1ffffffff285bd06
R10: dffffc0000000000 R11: fffffbfff285bd07 R12: dffffc0000000000
R13: 1ffff92000637ed8 R14: ffffc900031bf6e0 R15: 0000000000000246
__slab_free+0x2c5/0x3d0
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4085 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4186
kmalloc_reserve+0xa8/0x2a0 net/core/skbuff.c:587
__alloc_skb+0x1f3/0x440 net/core/skbuff.c:678
alloc_skb include/linux/skbuff.h:1322 [inline]
ath9k_hif_usb_alloc_reg_in_urbs drivers/net/wireless/ath/ath9k/hif_usb.c:989 [inline]
ath9k_hif_usb_alloc_urbs+0xb75/0x10f0 drivers/net/wireless/ath/ath9k/hif_usb.c:1048
ath9k_hif_usb_dev_init drivers/net/wireless/ath/ath9k/hif_usb.c:1134 [inline]
ath9k_hif_usb_firmware_cb+0x12f/0x4b0 drivers/net/wireless/ath/ath9k/hif_usb.c:1267
request_firmware_work_func+0x1a6/0x280 drivers/base/firmware_loader/main.c:1197
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244