rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2673 jiffies s: 28349 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: 12823 Comm: kworker/0:4 Not tainted 6.11.0-rc5-syzkaller-00176-g20371ba12063 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 kernel/kcov.c:212
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 04 1b 78 7e 65 8b 05 05 1b 78 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
RSP: 0018:ffffc90000007200 EFLAGS: 00000006
RAX: 0000000000010104 RBX: ffffc900000072d0 RCX: ffffffff813cdd16
RDX: ffff88802b621e00 RSI: ffffffff813cdd20 RDI: 0000000000000005
RBP: ffffc90000007d28 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: ffffc900000072d8
R13: ffffc900000072e0 R14: ffffc90000000000 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0a0bc456c0 CR3: 0000000059e9e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 on_stack arch/x86/include/asm/stacktrace.h:59 [inline]
 stack_access_ok+0x1c9/0x270 arch/x86/kernel/unwind_orc.c:393
 deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
 unwind_next_frame+0x1b94/0x23a0 arch/x86/kernel/unwind_orc.c:648
 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
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2252 [inline]
 slab_free mm/slub.c:4473 [inline]
 kfree+0x12a/0x3b0 mm/slub.c:4594
 dummy_timer+0x1750/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1981
 __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:write_comp_data+0x0/0x90 kernel/kcov.c:239
Code: 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 c3 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <49> 89 d2 49 89 f8 49 89 f1 65 48 8b 15 7f 1a 78 7e 65 8b 05 80 1a
RSP: 0018:ffffc90000007b78 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff88805e0f24b0 RCX: ffffffff892450f6
RDX: 0000000000000000 RSI: 00028f5c28f5c28e RDI: 0000000000000007
RBP: ffff88802c40e300 R08: 0000000000000007 R09: 0019999999999998
R10: 0000000000000000 R11: 0000000000000000 R12: 00028f5c28f5c28e
R13: 0000000000000000 R14: 00000000112e0be8 R15: 0000000000000000
 pie_calculate_probability+0x236/0x850 net/sched/sch_pie.c:347
 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:__sanitizer_cov_trace_const_cmp4+0x0/0x20 kernel/kcov.c:312
Code: 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 2a fe ff ff
RSP: 0018:ffffc900037ef740 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff813cf0ff
RDX: ffff88802b621e00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900037ef7e0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000000 R12: ffffc900037ef750
R13: ffffffff81775bb0 R14: ffffc900037ef810 R15: ffff88802b621e00
 arch_stack_walk+0x10f/0x170 arch/x86/kernel/stacktrace.c:24
 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
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2252 [inline]
 slab_free mm/slub.c:4473 [inline]
 kfree+0x12a/0x3b0 mm/slub.c:4594
 skb_kfree_head net/core/skbuff.c:1084 [inline]
 skb_free_head+0x108/0x1d0 net/core/skbuff.c:1096
 skb_release_data+0x75c/0x980 net/core/skbuff.c:1123
 skb_release_all net/core/skbuff.c:1188 [inline]
 __kfree_skb net/core/skbuff.c:1202 [inline]
 consume_skb net/core/skbuff.c:1426 [inline]
 consume_skb+0xd0/0x160 net/core/skbuff.c:1420
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline]
 nsim_dev_trap_report_work+0x878/0xc80 drivers/net/netdevsim/dev.c:850
 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>