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): P5808/1:b..l rcu: (detected by 0, t=10503 jiffies, g=10001, q=600 ncpus=2) task:kworker/0:4 state:R running task stack:25784 pid:5808 ppid:2 flags:0x00004000 Workqueue: events_power_efficient gc_worker Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1553/0x45a0 kernel/sched/core.c:6700 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010 irqentry_exit+0x67/0x70 kernel/entry/common.c:438 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:seqcount_lockdep_reader_access+0x19a/0x1d0 include/linux/seqlock.h:105 Code: f8 4d 85 e4 75 16 e8 05 62 ca f8 eb 15 e8 fe 61 ca f8 e8 89 65 c9 01 4d 85 e4 74 ea e8 ef 61 ca f8 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 43 c7 44 3e 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc9000488f9a0 EFLAGS: 00000293 RAX: ffffffff88bcbfe1 RBX: 0000000000000000 RCX: ffff88805ed99e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000488fa50 R08: ffffffff911c4597 R09: 1ffffffff22388b2 R10: dffffc0000000000 R11: fffffbfff22388b3 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff92000911f34 R15: dffffc0000000000 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:350 [inline] gc_worker+0x317/0x1490 net/netfilter/nf_conntrack_core.c:1504 process_one_work kernel/workqueue.c:2653 [inline] process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811 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: rcu_preempt kthread starved for 6748 jiffies! g10001 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:27656 pid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1553/0x45a0 kernel/sched/core.c:6700 schedule+0xbd/0x170 kernel/sched/core.c:6774 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168 rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667 rcu_gp_kthread+0x9d/0x3b0 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: 5946 Comm: syz.1.36 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:687 Code: 06 0b e6 ff e9 c1 04 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 c1 03 00 00 48 89 c4 48 89 e7 e8 26 0a e6 ff e9 a1 04 00 00 90 0f 1e fa 0f 01 ca fc 6a ff e8 a1 03 00 00 48 89 c4 48 89 e7 e8 RSP: 0018:ffffc900001efca8 EFLAGS: 00000046 RAX: ffffffff813b46c0 RBX: ffffc900001e9000 RCX: 1ffff9200003dfb5 RDX: ffff888024058000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000002 R08: ffff888024058000 R09: 0000000000000003 R10: 0000000000000004 R11: 0000000000000100 R12: 1ffff9200003dfb6 R13: 1ffff9200003dfb7 R14: ffffc900001f07b8 R15: ffffc900001f1000 FS: 00007f128b7e86c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007facca80c3a3 CR3: 000000002865f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline] RIP: 0010:write_comp_data kernel/kcov.c:245 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x10/0x90 kernel/kcov.c:313 Code: 11 10 48 89 74 11 18 48 89 44 11 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 15 30 90 7c 7e <65> 8b 0d 31 90 7c 7e 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 RSP: 0018:ffffc900001efcd0 EFLAGS: 00000246 on_stack arch/x86/include/asm/stacktrace.h:58 [inline] stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline] deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline] unwind_next_frame+0xf00/0x2970 arch/x86/kernel/unwind_orc.c:585 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:53 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1811 [inline] slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837 slab_free mm/slub.c:3830 [inline] kmem_cache_free+0xf8/0x270 mm/slub.c:3852 __netif_receive_skb_core+0x34c8/0x3af0 net/core/dev.c:5608 __netif_receive_skb_one_core net/core/dev.c:5632 [inline] __netif_receive_skb+0x74/0x290 net/core/dev.c:5748 netif_receive_skb_internal net/core/dev.c:5834 [inline] netif_receive_skb+0x1bc/0x720 net/core/dev.c:5893 NF_HOOK+0x9e/0x3a0 include/linux/netfilter.h:304 br_handle_frame_finish+0x13e5/0x18f0 net/bridge/br_input.c:221 nf_hook_bridge_pre net/bridge/br_input.c:299 [inline] br_handle_frame+0x7f7/0x14d0 net/bridge/br_input.c:424 __netif_receive_skb_core+0xfab/0x3af0 net/core/dev.c:5528 __netif_receive_skb_one_core net/core/dev.c:5632 [inline] __netif_receive_skb+0x74/0x290 net/core/dev.c:5748 process_backlog+0x391/0x6f0 net/core/dev.c:6076 __napi_poll+0xc0/0x460 net/core/dev.c:6638 napi_poll net/core/dev.c:6705 [inline] net_rx_action+0x616/0xc40 net/core/dev.c:6841 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:qlist_free_all+0x39/0xd0 mm/kasan/quarantine.c:182 Code: ed 0f 84 af 00 00 00 49 89 f6 48 89 fb 49 bd 00 00 00 00 00 fc ff df 49 89 ef 4d 89 f4 4d 85 f6 75 0b 4c 89 ff e8 c7 04 00 00 <49> 89 c4 49 8b 2f 49 63 84 24 c0 00 00 00 49 29 c7 4c 89 e7 4c 89 RSP: 0018:ffffc90004f97a90 EFLAGS: 00000282 RAX: ffff888019e4db40 RBX: ffffc90004f97ac8 RCX: ffffea0000bad580 RDX: ffffea0000000000 RSI: 000000000001103d RDI: 000000000001103e RBP: ffff88802eb56000 R08: ffff8880b8f41ec3 R09: 1ffff110171e83d8 R10: dffffc0000000000 R11: ffffed10171e83d9 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88802eb56000 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 ____kasan_kmalloc mm/kasan/common.c:341 [inline] __kasan_kmalloc+0x22/0xa0 mm/kasan/common.c:384 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] bpf_prog_alloc_no_stats+0xd8/0x440 kernel/bpf/core.c:102 bpf_prog_alloc+0x3d/0x1a0 kernel/bpf/core.c:136 bpf_prog_load+0x6eb/0x1670 kernel/bpf/syscall.c:2684 __sys_bpf+0x5ba/0x890 kernel/bpf/syscall.c:5477 __do_sys_bpf kernel/bpf/syscall.c:5581 [inline] __se_sys_bpf kernel/bpf/syscall.c:5579 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579 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: 0033:0x7f128a99c819 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:00007f128b7e8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f128ac16090 RCX: 00007f128a99c819 RDX: 0000000000000057 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007f128aa32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f128ac16128 R14: 00007f128ac16090 R15: 00007ffcd0dfa848 net_ratelimit: 306 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, 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 veth0_to_bridge with own address as source address (addr:46:9c:bb:b6:46:cb, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:46:9c:bb:b6:46:cb, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:b4:4a:00:8d:5a, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:46:9c:bb:b6:46:cb, 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:46:9c:bb:b6:46:cb, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 158 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:46:9c:bb:b6:46:cb, 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:46:9c:bb:b6:46:cb, 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 bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:b4:4a:00:8d:5a, 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 veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)