bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=176845, q=1581 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 8927 (4295054031-4295045104), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 8927 jiffies! g176845 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:27536 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1821/0x5740 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x164/0x360 kernel/sched/core.c:7283 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297 kthread+0x389/0x470 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: 28130 Comm: kworker/R-bond1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: 0x0 (bond12) RIP: 0010:debug_smp_processor_id+0xb/0x20 lib/smp_processor_id.c:58 Code: f9 e9 67 ff ff ff cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 c7 c7 80 b9 28 8c <48> c7 c6 c0 b9 28 8c eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 RSP: 0018:ffffc90000006f28 EFLAGS: 00000006 RAX: 0000000000010100 RBX: ffff8880b86243d8 RCX: dffffc0000000000 RDX: 0000000000010100 RSI: 0000000000000000 RDI: ffffffff8c28b980 RBP: 0000000000000000 R08: ffffffff903037f7 R09: 1ffffffff20606fe R10: dffffc0000000000 R11: fffffbfff20606ff R12: ffff8880b86243e8 R13: 00000000000016d7 R14: ffff88804f4a5d00 R15: 000001104783b97d FS: 0000000000000000(0000) GS:ffff88812529f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff459e33c06 CR3: 000000002371a000 CR4: 00000000003526f0 Call Trace: irqtime_account_delta kernel/sched/cputime.c:44 [inline] irqtime_account_irq+0xb4/0x1b0 kernel/sched/cputime.c:79 account_hardirq_exit include/linux/vtime.h:154 [inline] __irq_exit_rcu+0x26/0x220 kernel/softirq.c:727 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0x57/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_is_held_type+0x106/0x150 kernel/locking/lockdep.c:5945 Code: 1a 00 00 b8 ff ff ff ff 65 0f c1 05 64 cd 90 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f 0b 90 48 c7 RSP: 0018:ffffc90000007050 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000080000101 RDX: 0000000000000100 RSI: ffffffff8e217416 RDI: ffffffff8c28b9e0 RBP: 00000000ffffffff R08: ffffc900000073c0 R09: ffffc900000073d0 R10: ffffc90000007220 R11: fffff52000000e46 R12: 0000000000000246 R13: ffff88804f4a5d00 R14: ffffffff8fdc8fc0 R15: 0000000000000004 lock_is_held include/linux/lockdep.h:249 [inline] lockdep_rtnl_is_held+0x1b/0x40 net/core/rtnetlink.c:182 __in6_dev_get include/net/addrconf.h:348 [inline] ip6_ignore_linkdown+0x4f/0x140 include/net/addrconf.h:449 find_match+0x9c/0xb40 net/ipv6/route.c:783 __find_rr_leaf+0x248/0x760 net/ipv6/route.c:871 find_rr_leaf net/ipv6/route.c:892 [inline] rt6_select net/ipv6/route.c:936 [inline] fib6_table_lookup+0x3b4/0xa80 net/ipv6/route.c:2254 ip6_pol_route+0x228/0x13d0 net/ipv6/route.c:2290 pol_lookup_func include/net/ip6_fib.h:667 [inline] __fib6_rule_action net/ipv6/fib6_rules.c:240 [inline] fib6_rule_action+0x9d7/0xc00 net/ipv6/fib6_rules.c:278 fib_rules_lookup+0x768/0xea0 net/core/fib_rules.c:339 fib6_rule_lookup+0x1a0/0x730 net/ipv6/fib6_rules.c:115 ip6_route_input_lookup net/ipv6/route.c:2359 [inline] ip6_route_input+0x730/0xad0 net/ipv6/route.c:2662 ip6_rcv_finish+0x141/0x280 net/ipv6/ip6_input.c:117 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6202 [inline] __netif_receive_skb net/core/dev.c:6315 [inline] process_backlog+0x7dd/0x1950 net/core/dev.c:6666 __napi_poll+0xae/0x340 net/core/dev.c:7733 napi_poll net/core/dev.c:7796 [inline] net_rx_action+0x627/0xf70 net/core/dev.c:7953 handle_softirqs+0x22a/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:1061 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:655 [inline] RIP: 0010:__mutex_lock+0x305/0x1550 kernel/locking/mutex.c:820 Code: f6 e8 0f 1a f8 f5 48 85 c0 74 17 4c 89 e7 48 89 c6 31 d2 31 c9 e8 8b 2a f8 f5 84 c0 74 39 f3 90 eb da 4c 89 ef e8 9b 38 f9 f5 <4c> 89 e7 31 f6 e8 41 26 f8 f5 bf 01 00 00 00 e8 17 cc ea f5 65 8b RSP: 0018:ffffc90003ba7ac0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 33f814c2beac9100 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90003ba7a40 RBP: ffffc90003ba7c78 R08: ffffc90003ba7a47 R09: 1ffff92000774f48 R10: dffffc0000000000 R11: fffff52000774f49 R12: ffffffff8e7faf20 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 worker_attach_to_pool+0x2e/0x3a0 kernel/workqueue.c:2729 rescuer_thread+0x35c/0x1130 kernel/workqueue.c:3614 kthread+0x389/0x470 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 net_ratelimit: 8371 callbacks suppressed bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) net_ratelimit: 8007 callbacks suppressed bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:6e:25:71:c2:23:41, vlan:0)