rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2683 jiffies s: 7061 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5229 Comm: syz-executor Not tainted 6.11.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:in_softirq_really kernel/kcov.c:170 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1e/0x70 kernel/kcov.c:216
Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 84 61 79 7e 65 8b 05 85 61 79 7e a9 00 01 ff 00 48 8b 34 24 74 1d <f6> c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b 82 1c
RSP: 0018:ffffc90000a18028 EFLAGS: 00000006
RAX: 0000000000010102 RBX: ffffc90000a18058 RCX: ffffffff813cd8b7
RDX: ffff888068328000 RSI: ffffffff813cd8c0 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000a180a0
R13: ffffffff817615a0 R14: ffffc90000a18118 R15: ffff888068328000
FS:  000055556abb0500(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31e0eff8 CR3: 0000000065b04000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 unwind_get_return_address+0x90/0xe0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0xc1/0x170 arch/x86/kernel/stacktrace.c:26
 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:div_u64_rem include/linux/math64.h:29 [inline]
RIP: 0010:div_u64 include/linux/math64.h:130 [inline]
RIP: 0010:pie_calculate_probability+0x284/0x850 net/sched/sch_pie.c:347
Code: 89 c5 48 89 6c 24 38 e8 4a cb 6a f8 47 8d 24 a4 31 d2 4c 89 ff 43 8d 0c 24 49 c1 ee 02 48 b8 ff ff ff ff ff ff ff 00 48 f7 f1 <48> 89 c5 48 89 c6 48 c1 eb 02 49 89 cc e8 ca cc 6a f8 49 39 ef 73
RSP: 0018:ffffc90000a18b80 EFLAGS: 00000203
RAX: 000000a7c5ac471b RBX: 0000000000000000 RCX: 00000000000186a0
RDX: 0000000000006d1f RSI: ffffffff891fae26 RDI: 0000000000000000
RBP: 0000068db8bac710 R08: 0000000000000005 R09: 00000000000f4240
R10: 0000000000002710 R11: 0000000000000000 R12: 000000000000c350
R13: 0000000000000003 R14: 000000000044b82f R15: 0000000000000000
 fq_pie_timer+0x215/0x5a0 net/sched/sch_fq_pie.c:398
 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:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5062
Code: a9 0a 00 00 44 8b 0d 97 1d b8 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 d9 b8 36 00 fb 65 48 8b 1d 80 ce a8 7e <48> 8d bb f8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90003237a48 EFLAGS: 00000206
RAX: 0000000000202403 RBX: ffff888068328000 RCX: 1ffffffff2025699
RDX: 0000000000000000 RSI: ffffffff8b4cc4a0 RDI: ffffffff8bb09ac0
RBP: ffffc90003237a90 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff9012f91f R11: 0000000000000000 R12: ffff8880b933fb58
R13: ffff888017a98000 R14: ffff8880167acc00 R15: ffff8880b933edc0
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0xe3f/0x5490 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 do_nanosleep+0x216/0x510 kernel/time/hrtimer.c:2030
 hrtimer_nanosleep+0x1ab/0x440 kernel/time/hrtimer.c:2083
 common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1350
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1373 [inline]
 __x64_sys_clock_nanosleep+0x344/0x4a0 kernel/time/posix-timers.c:1373
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe5ffdabf65
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 c6 57 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 1f 58 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007fff4f2938a0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000396 RCX: 00007fe5ffdabf65
RDX: 00007fff4f2938e0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff4f29393c R08: 0000000000000000 R09: 00007fe600bd0080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000024
R13: 00000000000481f0 R14: 0000000000047bc3 R15: 00007fff4f293990
 </TASK>
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog