rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2680 jiffies s: 5201 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 PID: 4690 Comm: syz.1.84 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:class_irqsave_destructor include/linux/irqflags.h:272 [inline]
RIP: 0010:perf_swevent_event+0x481/0x570 kernel/events/core.c:9641
Code: 00 4c 8b 24 24 4d 85 e4 75 07 e8 ba c1 dc ff eb 0a e8 b3 c1 dc ff e8 be 2a e3 ff 42 c6 44 33 04 00 48 c7 44 24 40 00 00 00 00 <9c> 8f 44 24 40 4c 8b 7c 24 40 42 c6 44 33 04 f8 4c 89 fe 48 81 e6
RSP: 0018:ffffc900001dfc20 EFLAGS: 00000046
RAX: ffffffff81a5b396 RBX: 1ffff9200003bf88 RCX: ffff88802cfabb80
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc900001dfcf0 R08: ffff88802cfabb87 R09: 1ffff110059f5770
R10: dffffc0000000000 R11: ffffed10059f5771 R12: 0000000000000000
R13: 0000000002000009 R14: dffffc0000000000 R15: ffff88805796bc00
FS:  00007f69e67966c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f935af456b8 CR3: 00000000276dd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 perf_tp_event+0x3e7/0xc30 kernel/events/core.c:10064
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10032
 perf_trace_preemptirq_template+0x268/0x320 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_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__in6_dev_get include/net/addrconf.h:323 [inline]
RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:414 [inline]
RIP: 0010:find_match+0xa8/0xc80 net/ipv6/route.c:784
Code: fc ff df 42 80 7c 25 00 00 74 08 48 89 df e8 3f e4 e0 f8 48 89 d8 bb 40 03 00 00 48 03 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 1e e4 e0 f8 48 8b 1b e8 36 4e 3b 01 41 89 c4 31
RSP: 0018:ffffc900001e01a0 EFLAGS: 00000246
RAX: 1ffff1100fe07068 RBX: ffff88807f038340 RCX: 0000000000000100
RDX: ffff88802cfabb80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1100ab5ea95 R08: ffffc900001e04a0 R09: ffffc900001e04b0
R10: dffffc0000000000 R11: fffff5200003c062 R12: dffffc0000000000
R13: 0000000000000003 R14: 1ffff1100ab5ea97 R15: ffff888055af54bf
 __find_rr_leaf+0x245/0x760 net/ipv6/route.c:872
 find_rr_leaf net/ipv6/route.c:893 [inline]
 rt6_select net/ipv6/route.c:937 [inline]
 fib6_table_lookup+0x3b1/0xa80 net/ipv6/route.c:2224
 ip6_pol_route+0x244/0x12a0 net/ipv6/route.c:2260
 pol_lookup_func include/net/ip6_fib.h:579 [inline]
 fib6_rule_lookup+0x208/0x5d0 net/ipv6/fib6_rules.c:116
 ip6_route_input_lookup net/ipv6/route.c:2329 [inline]
 ip6_route_input+0x725/0xa40 net/ipv6/route.c:2625
 ip6_rcv_finish+0x13f/0x230 net/ipv6/ip6_input.c:77
 NF_HOOK+0x329/0x3b0 include/linux/netfilter.h:302
 __netif_receive_skb_one_core net/core/dev.c:5619 [inline]
 __netif_receive_skb+0xcc/0x290 net/core/dev.c:5733
 process_backlog+0x38d/0x6f0 net/core/dev.c:6061
 __napi_poll+0xc0/0x460 net/core/dev.c:6628
 napi_poll net/core/dev.c:6695 [inline]
 net_rx_action+0x5dd/0xb20 net/core/dev.c:6809
 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 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:5124
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 b0 4c de 08 e8 4b 2d 2f 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:ffffc9000558f4f8 EFLAGS: 00000282
RAX: 4c7216a3c07f5e00 RBX: 0000000000000000 RCX: 4c7216a3c07f5e00
RDX: dffffc0000000000 RSI: ffffffff8a8c1120 RDI: ffffffff8adf1320
RBP: ffffc9000558f550 R08: ffffffff90af9287 R09: 1ffffffff215f250
R10: dffffc0000000000 R11: fffffbfff215f251 R12: ffff88802cfabb80
R13: dffffc0000000000 R14: ffff888017749dc0 R15: ffff8880b8f3b5d0
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x11d9/0x40e0 kernel/sched/core.c:6562
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
 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:perf_event_exit_task+0xe2/0x960 kernel/events/core.c:13180
Code: 3c 28 00 74 08 48 89 df e8 8b 3b 2d 00 4c 8b 23 49 39 dc 0f 84 36 01 00 00 48 89 5c 24 28 4d 89 e7 49 c1 ef 03 43 80 3c 2f 00 <74> 08 4c 89 e7 e8 64 3b 2d 00 4d 8b 34 24 4c 89 e7 e8 f8 62 6f 02
RSP: 0018:ffffc9000558f860 EFLAGS: 00000246
RAX: ffffffff81a64738 RBX: ffff88802cfad048 RCX: ffff88802cfabb80
RDX: 0000000000000000 RSI: ffffffff8adf1300 RDI: ffff88801773faf8
RBP: ffffc9000558f9d0 R08: ffffffff8e1ff3ef R09: 1ffffffff1c3fe7d
R10: dffffc0000000000 R11: fffffbfff1c3fe7e R12: ffff88801773f4f0
R13: dffffc0000000000 R14: ffff88801773f4f0 R15: 1ffff11002ee7e9e
 do_exit+0x900/0x2480 kernel/exit.c:865
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 get_signal+0x1272/0x1350 kernel/signal.c:2871
 arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f69e599cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f69e6796028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000085 RBX: 00007f69e5c16090 RCX: 00007f69e599cdd9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f69e5a32d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f69e5c16128 R14: 00007f69e5c16090 R15: 00007ffe32e58588
 </TASK>