bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=204537, q=160587 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 10271 (4295099819-4295089548), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10272 jiffies! g204537 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 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:27496 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7326 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:write_comp_data kernel/kcov.c:245 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:314 Code: 89 44 11 20 c3 cc cc cc cc cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 15 78 f9 a5 11 65 8b 0d 99 f9 a5 11 81 e1 00 01 ff 00 74 RSP: 0018:ffffc900000067e8 EFLAGS: 00000246 RAX: ffffffff89a10355 RBX: 0000000000000001 RCX: ffffffff8e88ef40 RDX: 0000000059944983 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff89a10324 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8eb59c60 R12: ffff888063698000 R13: ffffffff89a10324 R14: ffff8881895e08d8 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888124f59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f37c0e9a54e CR3: 0000000062116000 CR4: 00000000003526f0 Call Trace: rcu_read_lock include/linux/rcupdate.h:841 [inline] get_xps_queue net/core/dev.c:4629 [inline] netdev_pick_tx+0xae5/0xf20 net/core/dev.c:4703 netdev_core_pick_tx+0x145/0x360 net/core/dev.c:4738 __dev_queue_xmit+0x5c8/0x37f0 net/core/dev.c:4827 dev_queue_xmit include/linux/netdevice.h:3446 [inline] br_dev_queue_push_xmit+0x370/0x4b0 net/bridge/br_forward.c:53 NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:318 br_nf_post_routing+0xa53/0xee0 net/bridge/br_netfilter_hooks.c:964 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:273 [inline] NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316 br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66 br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1165 [inline] br_nf_forward_finish+0xa76/0xea0 net/bridge/br_netfilter_hooks.c:667 NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:318 br_nf_forward_ip+0x7eb/0xa30 net/bridge/br_netfilter_hooks.c:721 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:273 [inline] NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316 __br_forward+0x397/0x540 net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver net/bridge/br_forward.c:191 [inline] br_flood+0x3e6/0x8d0 net/bridge/br_forward.c:245 br_handle_frame_finish+0x1175/0x1990 net/bridge/br_input.c:229 br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1 br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:318 [inline] br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_bridge_pre net/bridge/br_input.c:291 [inline] br_handle_frame+0x127f/0x1510 net/bridge/br_input.c:442 __netif_receive_skb_core+0x989/0x30b0 net/core/dev.c:6093 __netif_receive_skb_one_core net/core/dev.c:6204 [inline] __netif_receive_skb net/core/dev.c:6319 [inline] process_backlog+0x706/0x1860 net/core/dev.c:6670 __napi_poll+0xaa/0x330 net/core/dev.c:7729 napi_poll net/core/dev.c:7792 [inline] net_rx_action+0x61d/0xf50 net/core/dev.c:7949 handle_softirqs+0x225/0x840 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64 Code: dc 80 02 e9 13 05 03 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 53 ca 1a 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 RSP: 0018:ffffffff8e807de0 EFLAGS: 00000242 RAX: 000000000202d8cd RBX: ffffffff819ab33c RCX: 0000000080000001 RDX: 0000000000000001 RSI: ffffffff8e229caa RDI: ffffffff8c4bd380 RBP: ffffffff8e807eb8 R08: ffff8880b86338db R09: 1ffff110170c671b R10: dffffc0000000000 R11: ffffed10170c671c R12: 0000000000000000 R13: 1ffffffff1d11de8 R14: 1ffffffff1d00fc4 R15: dffffc0000000000 arch_safe_halt arch/x86/kernel/process.c:767 [inline] default_idle+0x9/0x20 arch/x86/kernel/process.c:768 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x1cc/0x540 kernel/sched/idle.c:355 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454 rest_init+0x2de/0x300 init/main.c:717 start_kernel+0x392/0x3e0 init/main.c:1175 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x157 net_ratelimit: 11578 callbacks suppressed bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) net_ratelimit: 14777 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0) bridge0: received packet on geneve0 with own address as source address (addr:32:3f:e3:8a:69:6d, vlan:0)