bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5205/1:b..l rcu: (detected by 0, t=10503 jiffies, g=13425, q=443 ncpus=2) task:udevd state:R running task stack:23904 pid:5205 tgid:5205 ppid:1 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__rcu_read_unlock+0xd/0x110 kernel/rcu/tree_plugin.h:430 Code: aa 4c 89 ff e8 84 e7 7f 00 eb a0 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 <53> 49 bc 00 00 00 00 00 fc ff df 65 4c 8b 34 25 00 d6 03 00 4d 8d RSP: 0018:ffffc900033f7a18 EFLAGS: 00000246 RAX: d3f41dc68bd54200 RBX: 0000000000000002 RCX: ffffc900033f7903 RDX: 0000000000000000 RSI: ffffffff8c0aaae0 RDI: ffffffff8c5fb0a0 RBP: 0000000000000002 R08: ffffffff901a55f7 R09: 1ffffffff2034abe R10: dffffc0000000000 R11: fffffbfff2034abf R12: 0000000000000002 R13: ffffc900033f7c60 R14: ffffc900033f7c88 R15: dffffc0000000000 try_to_unlazy+0x307/0x5b0 fs/namei.c:851 may_lookup fs/namei.c:1828 [inline] link_path_walk+0x83e/0xea0 fs/namei.c:2425 path_lookupat+0xa9/0x450 fs/namei.c:2633 filename_lookup+0x2a3/0x670 fs/namei.c:2663 do_readlinkat+0xf0/0x3a0 fs/stat.c:562 __do_sys_readlink fs/stat.c:599 [inline] __se_sys_readlink fs/stat.c:596 [inline] __x64_sys_readlink+0x7f/0x90 fs/stat.c:596 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f25fe317d47 RSP: 002b:00007ffeb42228d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 00007ffeb42228e8 RCX: 00007f25fe317d47 RDX: 0000000000000400 RSI: 00007ffeb42228e8 RDI: 00007ffeb4222dc8 RBP: 0000000000000400 R08: 0000563e357beb24 R09: 0000000000000000 R10: 0000000000000812 R11: 0000000000000246 R12: 00007ffeb4222dc8 R13: 00007ffeb4222d38 R14: 0000563e3579e910 R15: 0000000000000000 rcu: rcu_preempt kthread starved for 10476 jiffies! g13425 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:25976 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.13.0-rc6-syzkaller-01107-g3440fa34ad99 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:rt6_score_route+0x5b/0x380 net/ipv6/route.c:720 Code: 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 59 dd 97 f7 bd e0 00 00 00 49 03 2e 48 89 e8 48 c1 e8 03 42 0f b6 04 20 <84> c0 0f 85 c3 02 00 00 8b 6d 00 89 ef 89 de e8 d1 7a 31 f7 39 dd RSP: 0018:ffffc900001e60c8 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: 000000000000000d RCX: ffff88801d2f8000 RDX: ffff88801d2f8000 RSI: 000000000000000d RDI: 0000000000000000 RBP: ffff888026e360e0 R08: ffffffff8a6e0acd R09: ffffc900001e6430 R10: ffffc900001e6420 R11: fffff5200003cc52 R12: dffffc0000000000 R13: 0000000000000003 R14: ffff888027921cb8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fce6c148178 CR3: 000000007d46c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: find_match+0x1cb/0xc10 net/ipv6/route.c:752 __find_rr_leaf+0x275/0x8e0 net/ipv6/route.c:835 find_rr_leaf net/ipv6/route.c:856 [inline] rt6_select net/ipv6/route.c:900 [inline] fib6_table_lookup+0x413/0xbb0 net/ipv6/route.c:2195 ip6_pol_route+0x273/0x15d0 net/ipv6/route.c:2231 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x58c/0x790 net/ipv6/fib6_rules.c:119 ip6_route_input_lookup net/ipv6/route.c:2300 [inline] ip6_route_input+0x859/0xd90 net/ipv6/route.c:2596 ip6_rcv_finish+0x144/0x180 net/ipv6/ip6_input.c:77 ip_sabotage_in+0x203/0x290 net/bridge/br_netfilter_hooks.c:1021 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312 __netif_receive_skb_one_core net/core/dev.c:5726 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5839 netif_receive_skb_internal net/core/dev.c:5925 [inline] netif_receive_skb+0x1e8/0x890 net/core/dev.c:5984 NF_HOOK+0x9e/0x400 include/linux/netfilter.h:314 br_handle_frame_finish+0x1905/0x2000 br_nf_hook_thresh+0x472/0x590 br_nf_pre_routing_finish_ipv6+0xaa0/0xdd0 NF_HOOK include/linux/netfilter.h:314 [inline] br_nf_pre_routing_ipv6+0x379/0x770 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:282 [inline] br_handle_frame+0x9f3/0x1530 net/bridge/br_input.c:433 __netif_receive_skb_core+0x13e7/0x4540 net/core/dev.c:5620 __netif_receive_skb_one_core net/core/dev.c:5724 [inline] __netif_receive_skb+0x12f/0x650 net/core/dev.c:5839 process_backlog+0x662/0x15b0 net/core/dev.c:6171 __napi_poll+0xcb/0x490 net/core/dev.c:6954 napi_poll net/core/dev.c:7023 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7145 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 run_ksoftirqd+0xca/0x130 kernel/softirq.c:950 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 net_ratelimit: 18071 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 19685 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)