rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (3356 ticks this GP) idle=00ec/1/0x4000000000000000 softirq=24415/24415 fqs=4246
rcu: hardirqs softirqs csw/system
rcu: number: 800109 2 0
rcu: cputime: 11553 21996 46 ==> 33550(ms)
rcu: (t=10500 jiffies g=26597 q=1982 ncpus=2)
CPU: 0 PID: 8123 Comm: syz.3.724 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:fib6_node_lookup_1+0x292/0x8a0 net/ipv6/ip6_fib.c:1603
Code: 8c 55 fe ff ff 4c 89 f7 e8 cb 8b 9f f8 e9 48 fe ff ff 44 89 f1 80 e1 07 38 c1 7c 8e 4c 89 f7 89 f5 e8 12 8c 9f f8 89 ee eb 80 <48> 85 db 0f 84 a4 05 00 00 49 8d 45 10 48 89 44 24 18 4c 89 6c 24
RSP: 0018:ffffc90000006818 EFLAGS: 00000246
RAX: ffffffff893faf0f RBX: ffff88801877f800 RCX: ffff888028ce8000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc900000068ef R09: 0000000000000000
R10: ffffc900000068e0 R11: fffff52000000d1e R12: dffffc0000000000
R13: ffffc900000068c0 R14: ffff88801877f808 R15: 0000000000000000
FS: 00007f8e919186c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d523ffc CR3: 0000000030727000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
fib6_node_lookup+0xe5/0x1c0 net/ipv6/ip6_fib.c:1663
fib6_table_lookup+0xbd/0xa80 net/ipv6/route.c:2227
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_input_lookup net/ipv6/route.c:2336 [inline]
ip6_route_input+0x732/0xa50 net/ipv6/route.c:2632
ip6_rcv_finish+0x143/0x230 net/ipv6/ip6_input.c:77
ip_sabotage_in+0x1f4/0x280 net/bridge/br_netfilter_hooks.c:1001
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
NF_HOOK+0x21d/0x3b0 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5651 [inline]
__netif_receive_skb+0xcc/0x290 net/core/dev.c:5765
netif_receive_skb_internal net/core/dev.c:5851 [inline]
netif_receive_skb+0x1bc/0x720 net/core/dev.c:5910
NF_HOOK+0x9e/0x3a0 include/linux/netfilter.h:304
br_handle_frame_finish+0x14b9/0x19b0 net/bridge/br_input.c:221
br_nf_hook_thresh+0x3cd/0x4a0 net/bridge/br_netfilter_hooks.c:1184
br_nf_pre_routing_finish_ipv6+0x9dc/0xd00 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:304 [inline]
br_nf_pre_routing_ipv6+0x349/0x6b0 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x96b/0x14e0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xfab/0x3af0 net/core/dev.c:5545
__netif_receive_skb_one_core net/core/dev.c:5649 [inline]
__netif_receive_skb+0x74/0x290 net/core/dev.c:5765
process_backlog+0x396/0x700 net/core/dev.c:6093
__napi_poll+0xc0/0x460 net/core/dev.c:6655
napi_poll net/core/dev.c:6722 [inline]
net_rx_action+0x616/0xc50 net/core/dev.c:6859
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:generic_exec_single+0x481/0x4f0 kernel/smp.c:418
Code: 75 11 e8 02 02 0b 00 48 85 db 75 16 e8 f8 01 0b 00 eb 15 e8 f1 01 0b 00 e8 0c 29 08 09 48 85 db 74 ea e8 e2 01 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 43 c7 44 2c 08
RSP: 0018:ffffc9000ffe7a00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000cb89000 RSI: 00000000000031ae RDI: 00000000000031af
RBP: ffffc9000ffe7ad0 R08: ffffffff911bf5ff R09: 1ffffffff2237ebf
R10: dffffc0000000000 R11: fffffbfff2237ec0 R12: 1ffff92001ffcf44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92001ffcf65
smp_call_function_single+0x36d/0x5a0 kernel/smp.c:647
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x5be/0x920 kernel/events/core.c:2948
__do_sys_perf_event_open kernel/events/core.c:12915 [inline]
__se_sys_perf_event_open+0x1836/0x1c50 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: 0033:0x7f8e9099aeb9
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:00007f8e91918028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f8e90c15fa0 RCX: 00007f8e9099aeb9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f8e90a08c1f R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e90c16038 R14: 00007f8e90c15fa0 R15: 00007ffe0f37aef8