rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2684 jiffies s: 1621 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 PID: 5148 Comm: kworker/0:8 Not tainted 6.5.0-syzkaller-09276-g99d99825fc07 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:207
Code: bd 41 7c 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 ba 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 04 16 00 00 <85> c0 74 2b 8b 82 e0 15 00 00 83 f8 02 75 20 48 8b 8a e8 15 00 00
RSP: 0018:ffffc90000007bb8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffc9000ce7a980 RCX: 0000000000000100
RDX: ffff8880278cd940 RSI: ffffffff885ffd07 RDI: 0000000000000007
RBP: ffff8881476a5300 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0200000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: fffffff0a3da8872 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e1126e0e78 CR3: 000000000c776000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 pie_calculate_probability+0x397/0x850 net/sched/sch_pie.c:395
 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1074
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:220 [inline]
RIP: 0010:unwind_next_frame+0x2fa/0x2390 arch/x86/kernel/unwind_orc.c:494
Code: 8f 83 c0 01 49 81 fd 82 7f e0 8f 89 44 24 34 0f 83 0a 0a 00 00 e8 16 5c 4d 00 8b 54 24 34 48 8d 14 52 48 8d 94 12 50 1b 2f 8f <48> 81 fa 82 7f e0 8f 0f 87 e8 09 00 00 e8 f4 5b 4d 00 8b 54 24 34
RSP: 0018:ffffc900043df708 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc900043df788 RCX: 0000000000000000
RDX: ffffffff8f3600ac RSI: ffffffff813a1caa RDI: ffffffff8fe1d658
RBP: 0000000000000001 R08: 0000000000000004 R09: 00000000000055b4
R10: 0000000000096000 R11: 1ef8f3862195372f R12: ffffffff8155b4a6
R13: ffffffff8f3600a6 R14: 0000000000012639 R15: ffffc900043df7bd
 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x185/0x3f0 mm/slub.c:3523
 __alloc_skb+0x287/0x330 net/core/skbuff.c:634
 alloc_skb include/linux/skbuff.h:1286 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
 nsim_dev_trap_report_work+0x29e/0xc70 drivers/net/netdevsim/dev.c:850
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
 worker_thread+0x687/0x1110 kernel/workqueue.c:2751
 kthread+0x33a/0x430 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>