rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2627 jiffies s: 1773 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: 4051 Comm: syz.4.176 Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp4+0x1a/0x80 kernel/kcov.c:278
Code: 0a 10 48 89 74 0a 18 4c 89 44 0a 20 c3 0f 1f 00 4c 8b 04 24 65 48 8b 15 84 da 77 7e 65 8b 05 85 da 77 7e a9 00 01 ff 00 74 10 <a9> 00 01 00 00 74 5b 83 ba 1c 16 00 00 00 74 52 8b 82 f8 15 00 00
RSP: 0018:ffffc900001df420 EFLAGS: 00000206
RAX: 0000000000000100 RBX: 000000000000000d RCX: ffff888020165940
RDX: ffff888020165940 RSI: 000000000000000d RDI: 000000000000001e
RBP: 000000000000001e R08: ffffffff8949942f R09: ffffc900001df790
R10: ffffc900001df780 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000003 R14: ffff88805c8b84a8 R15: 0000000000000001
FS:  00007f587e8136c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32412ff8 CR3: 00000000237af000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rt6_score_route+0x6f/0x380 net/ipv6/route.c:718
 find_match+0x1b6/0xbe0 net/ipv6/route.c:750
 __find_rr_leaf+0x271/0x8e0 net/ipv6/route.c:833
 find_rr_leaf net/ipv6/route.c:854 [inline]
 rt6_select net/ipv6/route.c:898 [inline]
 fib6_table_lookup+0x40f/0xbb0 net/ipv6/route.c:2186
 ip6_pol_route+0x207/0x14e0 net/ipv6/route.c:2222
 pol_lookup_func include/net/ip6_fib.h:579 [inline]
 fib6_rule_lookup+0x265/0x620 net/ipv6/fib6_rules.c:116
 ip6_route_input_lookup net/ipv6/route.c:2291 [inline]
 ip6_route_input+0x830/0xd90 net/ipv6/route.c:2587
 ip6_rcv_finish+0x140/0x230 net/ipv6/ip6_input.c:77
 ip_sabotage_in+0x1f3/0x270 net/bridge/br_netfilter_hooks.c:993
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:614
 nf_hook include/linux/netfilter.h:257 [inline]
 NF_HOOK+0x29a/0x450 include/linux/netfilter.h:300
 __netif_receive_skb_one_core net/core/dev.c:5528 [inline]
 __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5642
 netif_receive_skb_internal net/core/dev.c:5728 [inline]
 netif_receive_skb+0x1f4/0x890 net/core/dev.c:5787
 NF_HOOK+0x96/0x3f0 include/linux/netfilter.h:302
 br_handle_frame_finish+0x1601/0x1bf0 net/bridge/br_input.c:204
 br_nf_hook_thresh+0x46a/0x580 net/bridge/br_netfilter_hooks.c:1176
 br_nf_pre_routing_finish_ipv6+0xa92/0xdc0
 NF_HOOK include/linux/netfilter.h:302 [inline]
 br_nf_pre_routing_ipv6+0x354/0x740 net/bridge/br_netfilter_ipv6.c:243
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:260 [inline]
 br_handle_frame+0x991/0x1340 net/bridge/br_input.c:406
 __netif_receive_skb_core+0x13dd/0x41d0 net/core/dev.c:5422
 __netif_receive_skb_one_core net/core/dev.c:5526 [inline]
 __netif_receive_skb+0x11c/0x530 net/core/dev.c:5642
 process_backlog+0x381/0x760 net/core/dev.c:5970
 __napi_poll+0xc7/0x470 net/core/dev.c:6537
 napi_poll net/core/dev.c:6604 [inline]
 net_rx_action+0x70f/0xeb0 net/core/dev.c:6718
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x16c/0x1f0 kernel/softirq.c:403
Code: 8a e8 98 13 37 09 65 66 8b 05 20 80 af 7e 66 85 c0 75 57 bf 01 00 00 00 e8 e1 42 0a 00 e8 7c 36 3d 00 fb 65 8b 05 cc 4f ae 7e <85> c0 75 05 e8 7b 73 ac ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c
RSP: 0018:ffffc9000a0276c0 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 1ffff92001404edc RCX: ffffffff91c95103
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: ffffffff8b3d4660
RBP: ffffc9000a027770 R08: ffffffff81b6295c R09: ffffed1017326ad6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92001404ee0 R14: ffffc9000a027700 R15: 0000000000000200
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 xdp_test_run_batch net/bpf/test_run.c:340 [inline]
 bpf_test_run_xdp_live+0x19ce/0x1ea0 net/bpf/test_run.c:362
 bpf_prog_test_run_xdp+0x7d1/0x1130 net/bpf/test_run.c:1387
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3670
 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:5023
 __do_sys_bpf kernel/bpf/syscall.c:5109 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5107 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5107
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f587d975b29
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:00007f587e813048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f587db03fa0 RCX: 00007f587d975b29
RDX: 0000000000000048 RSI: 0000000020000600 RDI: 000000000000000a
RBP: 00007f587d9f6756 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f587db03fa0 R15: 00007ffddfdf92c8
 </TASK>