rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2628 jiffies s: 11681 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: 6046 Comm: syz.3.449 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1b/0x60 kernel/kcov.c:216
Code: 89 de 5b e9 37 58 4f 00 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d 44 a0 81 7e 65 8b 15 45 a0 81 7e 81 e2 00 01 ff 00 74 11 <81> fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00
RSP: 0018:ffffc90000006e58 EFLAGS: 00000006
RAX: ffffffff81a73f37 RBX: 0000000000000001 RCX: ffff88802d9e1dc0
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000008
RBP: ffffc90000006f28 R08: dffffc0000000000 R09: fffffbfff1c3eebe
R10: fffffbfff1c3eebe R11: 1ffffffff1c3eebd R12: 0000000000000000
R13: ffffc90005827f58 R14: 0000000000000001 R15: 0000000000000008
FS:  00007f9ea716a6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000002cd4e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_callchain_store_context include/linux/perf_event.h:1378 [inline]
 get_perf_callchain+0x2c7/0x480 kernel/events/callchain.c:216
 perf_callchain kernel/events/core.c:7512 [inline]
 perf_prepare_sample+0x399/0x2040 kernel/events/core.c:7545
 __perf_event_output kernel/events/core.c:7730 [inline]
 perf_event_output_forward+0x163/0x2a0 kernel/events/core.c:7750
 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9496
 perf_tp_event+0x335/0xb60 kernel/events/core.c:10029
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
 perf_trace_preemptirq_template+0x287/0x330 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:__rcu_read_unlock+0x73/0xd0 kernel/rcu/tree_plugin.h:426
Code: 84 c0 75 5f 41 83 3e 00 75 20 43 0f b6 04 3c 84 c0 75 3a 8b 03 3d 00 00 00 40 73 0a 5b 41 5c 41 5d 41 5e 41 5f c3 0f 0b eb f2 <e8> 58 00 00 00 eb d9 89 d9 80 e1 07 80 c1 03 38 c1 7c ac 49 89 fe
RSP: 0018:ffffc90000007670 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff88802d9e21fc RCX: ffff88802d9e1dc0
RDX: 0000000000000100 RSI: ffffffff8adefc80 RDI: ffff88802d9e1dc0
RBP: ffffc90000007950 R08: dffffc0000000000 R09: fffffbfff215c46c
R10: fffffbfff215c46c R11: 1ffffffff215c46b R12: 1ffff11005b3c43f
R13: dffffc0000000000 R14: ffff88802d9e2200 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 __icmp_send+0xdf4/0x1320 net/ipv4/icmp.c:793
 ipv4_send_dest_unreach net/ipv4/route.c:1258 [inline]
 ipv4_link_failure+0x65c/0xa10 net/ipv4/route.c:1265
 dst_link_failure include/net/dst.h:423 [inline]
 arp_error_report+0x10e/0x160 net/ipv4/arp.c:296
 neigh_invalidate+0x22c/0x450 net/core/neighbour.c:1064
 neigh_timer_handler+0x911/0x1080 net/core/neighbour.c:1151
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5123
Code: 0f 84 3b 01 00 00 48 85 db 0f 85 5a 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 c0 00 c9 08 e8 8b b1 2e 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90005827738 EFLAGS: 00000282
RAX: 30251284c8393d00 RBX: 0000000000000000 RCX: 30251284c8393d00
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefca0
RBP: ffffc90005827790 R08: dffffc0000000000 R09: ffffed10171c6afa
R10: ffffed10171c6afa R11: 1ffff110171c6af9 R12: ffff88802d9e1dc0
R13: dffffc0000000000 R14: ffff88805317d940 R15: ffff8880b8e3b590
 context_switch kernel/sched/core.c:5247 [inline]
 __schedule+0x10f4/0x40b0 kernel/sched/core.c:6561
 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:should_fail_ex+0x128/0x4d0 lib/fault-inject.c:106
Code: c0 0f 85 0e 03 00 00 49 63 07 49 39 c6 7d 72 4c 89 ff be 04 00 00 00 e8 76 4c a6 fd f0 45 29 37 eb 4a 65 4c 8b 3d d8 c9 d7 7b <49> 81 c7 c4 15 00 00 4d 89 fd 49 c1 ed 03 43 0f b6 44 25 00 84 c0
RSP: 0018:ffffc90005827ab0 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffffffff8cb4d700 RCX: ffff88802d9e1dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8cb4d700
RBP: ffffc90005827bf0 R08: dffffc0000000000 R09: ffffc90005827c60
R10: fffff52000b04f8f R11: 1ffff92000b04f8c R12: dffffc0000000000
R13: 00007f9ea65d5fac R14: 0000000000000001 R15: ffff88802d9e1dc0
 should_fail_futex kernel/futex/core.c:82 [inline]
 get_futex_key+0x18f/0xf50 kernel/futex/core.c:240
 futex_wake+0x107/0x4b0 kernel/futex/waitwake.c:154
 do_futex+0x2e2/0x320 kernel/futex/syscalls.c:111
 __do_sys_futex kernel/futex/syscalls.c:183 [inline]
 __se_sys_futex+0x14a/0x440 kernel/futex/syscalls.c:164
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9ea638ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9ea716a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f9ea65d5fa8 RCX: 00007f9ea638ec29
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f9ea65d5fac
RBP: 00007f9ea65d5fa0 R08: 00127828eeac00aa R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9ea65d6038 R14: 00007ffefb5a47e0 R15: 00007ffefb5a48c8
 </TASK>