bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 0, t=10502 jiffies, g=78577, q=3913 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 6419 (4295015481-4295009062), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 6420 jiffies! g78577 f0x2 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:26568 pid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5380 [inline] __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699 schedule+0xbd/0x170 kernel/sched/core.c:6773 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16166 Comm: syz.1.3648 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:449 Code: 90 06 c6 05 a0 cd 90 0e 01 0f b6 05 79 b7 90 0e c3 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 fe bf 80 03 00 00 e8 1f 1b 01 00 <31> c0 c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 53 48 83 RSP: 0018:ffffc900001f0018 EFLAGS: 00000046 RAX: 000000000000015e RBX: ffff8880b8f28280 RCX: 0000000000000838 RDX: 0000000000000000 RSI: 000000000000015e RDI: 0000000000000838 RBP: 0000000000000000 R08: ffffffff8e4a8e2f R09: 1ffffffff1c951c5 R10: dffffc0000000000 R11: fffffbfff1c951c6 R12: dffffc0000000000 R13: 000000001000da1a R14: 000000000000015e R15: 0000000000000020 FS: 00007ff8bdd626c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000004b74d000 CR4: 00000000003506e0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: clockevents_program_event+0x1c0/0x310 kernel/time/clockevents.c:334 hrtimer_interrupt+0x5a1/0x9c0 kernel/time/hrtimer.c:1889 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline] __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:br_flood+0x331/0x680 net/bridge/br_forward.c:238 Code: 7c 24 30 4c 89 e6 48 8b 54 24 08 8b 4c 24 04 e8 65 03 00 00 48 89 44 24 30 48 3d 00 f0 ff ff 0f 87 34 01 00 00 e8 0f d5 38 f8 05 e8 08 d5 38 f8 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 RSP: 0018:ffffc900001f0278 EFLAGS: 00000246 RAX: ffffffff894ccb71 RBX: ffff88807be7e818 RCX: ffff888030dfda00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888023f00e88 R08: 0000000000000001 R09: 1ffff110092b476f R10: dffffc0000000000 R11: ffffed10092b4770 R12: ffff88807be7e800 R13: dffffc0000000000 R14: 0000000000000001 R15: 00000000000048e0 br_handle_frame_finish+0x143d/0x1950 net/bridge/br_input.c:215 br_nf_hook_thresh+0x3b6/0x480 net/bridge/br_netfilter_hooks.c:1184 br_nf_pre_routing_finish_ipv6+0x9e3/0xd90 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:304 [inline] br_nf_pre_routing_ipv6+0x34d/0x680 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+0x957/0x14c0 net/bridge/br_input.c:424 __netif_receive_skb_core+0xf6b/0x3ac0 net/core/dev.c:5502 __netif_receive_skb_one_core net/core/dev.c:5606 [inline] __netif_receive_skb+0x74/0x290 net/core/dev.c:5722 process_backlog+0x380/0x6e0 net/core/dev.c:6050 __napi_poll+0xc0/0x460 net/core/dev.c:6612 napi_poll net/core/dev.c:6679 [inline] net_rx_action+0x5ea/0xbf0 net/core/dev.c:6815 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+0xc7/0x190 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:migrate_enable+0x116/0x3c0 kernel/sched/core.c:2442 Code: 89 54 24 20 bf 01 00 00 00 e8 06 b2 ff ff 4d 8d be 18 04 00 00 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 ff e8 f0 43 81 00 4d 39 27 49 bc 00 00 00 00 00 fc ff RSP: 0018:ffffc9000e78f1e0 EFLAGS: 00000246 RAX: 1ffff110061bfbc3 RBX: 1ffff110061bfbc7 RCX: dffffc0000000000 RDX: ffff888030dfde38 RSI: 000000000000ab7c RDI: 0000000000000001 RBP: ffffc9000e78f2d0 R08: ffffc9000e78f36f R09: 0000000000000000 R10: ffffc9000e78f360 R11: fffff52001cf1e6e R12: ffff888030dfde28 R13: 1ffff92001cf1e44 R14: ffff888030dfda00 R15: ffff888030dfde18 bpf_prog_run_array include/linux/bpf.h:1998 [inline] trace_call_bpf+0x4a5/0x690 kernel/trace/bpf_trace.c:143 perf_trace_run_bpf_submit+0x7a/0x1c0 kernel/events/core.c:10263 perf_trace_lock_acquire+0x32a/0x3e0 include/trace/events/lock.h:24 trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x3e2/0x410 kernel/locking/lockdep.c:5725 rcu_lock_acquire include/linux/rcupdate.h:334 [inline] rcu_read_lock include/linux/rcupdate.h:786 [inline] page_ext_get+0x3e/0x2b0 mm/page_ext.c:508 __page_table_check_zero+0x138/0x4b0 mm/page_table_check.c:148 page_table_check_free include/linux/page_table_check.h:41 [inline] free_pages_prepare mm/page_alloc.c:1155 [inline] free_unref_page_prepare+0x7e1/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 __slab_free+0x35e/0x410 mm/slub.c:3736 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 ____kasan_kmalloc mm/kasan/common.c:340 [inline] __kasan_kmalloc+0x22/0xa0 mm/kasan/common.c:383 kmalloc_node include/linux/slab.h:616 [inline] kzalloc_node include/linux/slab.h:732 [inline] __get_vm_area_node+0x125/0x370 mm/vmalloc.c:2613 __vmalloc_node_range+0x36e/0x1320 mm/vmalloc.c:3299 __vmalloc_node mm/vmalloc.c:3404 [inline] __vmalloc+0x7a/0x90 mm/vmalloc.c:3418 bpf_prog_alloc_no_stats+0x47/0x440 kernel/bpf/core.c:98 bpf_prog_alloc+0x3d/0x1b0 kernel/bpf/core.c:136 bpf_prog_load+0x6b8/0x16d0 kernel/bpf/syscall.c:2681 __sys_bpf+0x55a/0x800 kernel/bpf/syscall.c:5473 __do_sys_bpf kernel/bpf/syscall.c:5577 [inline] __se_sys_bpf kernel/bpf/syscall.c:5575 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff8bcf8f749 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:00007ff8bdd62038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ff8bd1e5fa0 RCX: 00007ff8bcf8f749 RDX: 0000000000000048 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007ff8bd013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff8bd1e6038 R14: 00007ff8bd1e5fa0 R15: 00007ffd1da91108 net_ratelimit: 42 callbacks suppressed bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) net_ratelimit: 3673 callbacks suppressed bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0) bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)