rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10498 ticks this GP) idle=e20c/1/0x4000000000000000 softirq=50443/50443 fqs=5240 rcu: hardirqs softirqs csw/system rcu: number: 1298775 0 0 rcu: cputime: 20472 32017 71 ==> 52500(ms) rcu: (t=10501 jiffies g=69385 q=928 ncpus=2) CPU: 0 PID: 13915 Comm: syz.0.2260 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:fib6_table_lookup+0x0/0xa80 net/ipv6/route.c:2224 Code: e8 d5 3c 4c f8 c6 05 6f 43 3a 05 01 48 c7 c7 00 df cf 8b be 7d 06 00 00 48 c7 c2 40 e7 cf 8b e8 56 01 2e f8 e9 82 fb ff ff 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc90000007218 EFLAGS: 00000246 RAX: ffffffff893ac62d RBX: ffff88807c451d40 RCX: ffffc90000007920 RDX: 0000000000000031 RSI: ffff88805df55800 RDI: ffff88807c451d40 RBP: ffffc90000007330 R08: ffffc90000007290 R09: 0000000000000003 R10: dffffc0000000000 R11: fffffbfff22348a1 R12: ffffc90000007290 R13: ffffc90000007920 R14: 0000000000000003 R15: ffffc90000007290 FS: 00007f8759b486c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2eb23ffc CR3: 000000002d978000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: ip6_pol_route+0x239/0x1210 net/ipv6/route.c:2267 pol_lookup_func include/net/ip6_fib.h:622 [inline] fib6_rule_lookup+0x20c/0x570 net/ipv6/fib6_rules.c:116 ip6_route_output_flags_noref net/ipv6/route.c:2675 [inline] ip6_route_output_flags+0x364/0x5d0 net/ipv6/route.c:2687 ip6_route_output include/net/ip6_route.h:94 [inline] ip6_dst_lookup_tail+0x1ae/0x1530 net/ipv6/ip6_output.c:1126 icmpv6_route_lookup+0xfe/0x600 net/ipv6/icmp.c:363 icmp6_send+0x11a2/0x1b40 net/ipv6/icmp.c:604 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_link_failure+0x3b/0x4c0 net/ipv6/route.c:2835 dst_link_failure include/net/dst.h:437 [inline] ndisc_error_report+0x112/0x160 net/ipv6/ndisc.c:733 neigh_invalidate+0x22c/0x450 net/core/neighbour.c:1064 neigh_timer_handler+0x914/0xff0 net/core/neighbour.c:1151 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x542/0x800 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194 Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 ab 5d d0 f6 65 8b 05 9c b3 77 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900042cfca0 EFLAGS: 00000206 RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: af27f1ff3a5a4d00 RDX: dffffc0000000000 RSI: ffffffff8acabd00 RDI: 0000000000000001 RBP: ffffc900042cfd30 R08: ffffffff911a45ff R09: 1ffffffff22348bf R10: dffffc0000000000 R11: fffffbfff22348c0 R12: dffffc0000000000 R13: 1ffff92000859fb8 R14: ffff8880239bdc00 R15: 1ffff92000859f94 __do_sys_perf_event_open kernel/events/core.c:12916 [inline] __se_sys_perf_event_open+0x183e/0x1c50 kernel/events/core.c:12567 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8758b9acb9 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:00007f8759b48028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8758e15fa0 RCX: 00007f8758b9acb9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140 RBP: 00007f8758c08bf7 R08: 0000000000000002 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8758e16038 R14: 00007f8758e15fa0 R15: 00007ffdf23d6408