rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2656 jiffies s: 24749 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1186 Comm: kworker/0:2 Not tainted 6.11.0-rc6-syzkaller-00183-gb831f83e40a2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:unwind_next_frame+0x1b26/0x23a0 arch/x86/kernel/unwind_orc.c:648
Code: b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 84 e0 f5 ff ff 4c 89 ef e8 d9 87 ad 00 e9 d3 f5 ff ff e8 2f c6 4e 00 49 8d 7c 24 02 <48> ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 0f b6 0c 10 49
RSP: 0018:ffffc900000065f8 EFLAGS: 00000006
RAX: 0000000000010302 RBX: ffffc90000006678 RCX: ffffffff813cedbe
RDX: ffff888028713c00 RSI: ffffffff813cfa21 RDI: ffffffff91569154
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff91569152
R13: ffffc90004697988 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c361917 CR3: 000000006be66000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
 kmalloc_noprof include/linux/slab.h:681 [inline]
 dummy_urb_enqueue+0x8d/0x8a0 drivers/usb/gadget/udc/dummy_hcd.c:1271
 usb_hcd_submit_urb+0x2d1/0x2090 drivers/usb/core/hcd.c:1533
 usb_submit_urb+0x87c/0x1730 drivers/usb/core/urb.c:581
 ath9k_hif_usb_reg_in_cb+0x494/0x690 drivers/net/wireless/ath/ath9k/hif_usb.c:792
 __usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
 dummy_timer+0x17c3/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:218 [inline]
RIP: 0010:unwind_next_frame+0x289/0x23a0 arch/x86/kernel/unwind_orc.c:494
Code: 91 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 4f 9f ad 00 42 8b 04 b5 6c 70 5d 91 <41> 83 c5 01 4a 8d 3c ad 6c 70 5d 91 48 89 fa 48 c1 ea 03 89 44 24
RSP: 0018:ffffc900000071a0 EFLAGS: 00000246
RAX: 000000000011dd99 RBX: ffffc90000007220 RCX: ffffffff813ce13d
RDX: 0000000000000000 RSI: ffffffff813ce14b RDI: ffffffff91749b30
RBP: 0000000000000001 R08: 0000000000000004 R09: 000000000005cab1
R10: 00000000000a4000 R11: 0000000000000000 R12: ffffffff86cab159
R13: 000000000005cab1 R14: 000000000005cab1 R15: ffffc90000007255
 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:3106
 call_rcu_hurry include/linux/rcupdate.h:113 [inline]
 dst_release net/core/dst.c:165 [inline]
 dst_release+0x1b5/0x1e0 net/core/dst.c:162
 refdst_drop include/net/dst.h:263 [inline]
 skb_dst_drop include/net/dst.h:275 [inline]
 __dev_queue_xmit+0x2341/0x4300 net/core/dev.c:4378
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip6_finish_output2+0x1184/0x1a50 net/ipv6/ip6_output.c:141
 __ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
 ip6_finish_output+0x3f9/0x1300 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247
 dst_output include/net/dst.h:450 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ndisc_send_skb+0xa2d/0x1c30 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x129/0x670 net/ipv6/ndisc.c:721
 addrconf_rs_timer+0x407/0x840 net/ipv6/addrconf.c:4040
 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1792
 expire_timers kernel/time/timer.c:1843 [inline]
 __run_timers+0x74b/0xaf0 kernel/time/timer.c:2417
 __run_timer_base kernel/time/timer.c:2428 [inline]
 __run_timer_base kernel/time/timer.c:2421 [inline]
 run_timer_base+0x111/0x190 kernel/time/timer.c:2437
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2447
 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kcov_remote_start+0x3df/0x6e0 kernel/kcov.c:934
Code: 90 e8 15 cc 2a 03 e9 4b ff ff ff e8 eb 35 07 00 e9 ba fc ff ff e8 b1 37 07 00 9c 58 f6 c4 02 0f 85 50 02 00 00 fb 48 83 c4 18 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc be 02 00 00 00 4c 89
RSP: 0018:ffffc90004697a38 EFLAGS: 00000282
RAX: 0000000000000002 RBX: ffff8880b882d648 RCX: 1ffffffff2d2a393
RDX: 0000000000000000 RSI: ffffffff8b4cd740 RDI: ffffffff8bb0f9c0
RBP: ffff888028713c00 R08: 0000000000000001 R09: fffffbfff2d248ee
R10: ffffffff96924777 R11: 0000000000000000 R12: ffff888066c8c500
R13: 0000000000000200 R14: 0000000000100000 R15: ffffc9001535c000
 kcov_remote_start_usb include/linux/kcov.h:55 [inline]
 hub_event+0x19a/0x4e10 drivers/usb/core/hub.c:5839
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>