bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 0, t=10502 jiffies, g=11889, q=723 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 10498 (4294960223-4294949725), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10499 jiffies! g11889 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:27216 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6848 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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 6.12.0-syzkaller-11930-g0e287d31b62b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:____rb_erase_color lib/rbtree.c:263 [inline] RIP: 0010:rb_erase+0x334/0x1360 lib/rbtree.c:445 Code: f0 48 c1 e8 03 42 80 3c 20 00 0f 85 be 09 00 00 41 f6 06 01 0f 84 2d 06 00 00 4c 8d 73 10 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 <0f> 85 4e 0b 00 00 4c 8b 6b 10 4d 85 ed 74 1d 4c 89 e8 48 c1 e8 03 RSP: 0018:ffffc90000a18b10 EFLAGS: 00000046 RAX: 1ffff920007c3f03 RBX: ffffc90003e1f808 RCX: ffff8880b872cad0 RDX: 1ffff110170e5af6 RSI: ffff8880b872cad0 RDI: ffffc90003e1f810 RBP: ffff8880b872d7a0 R08: 0000000000000006 R09: ffff8880b872d7a1 R10: ffff8880b873f600 R11: 0000000000000003 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffc90003e1f818 R15: ffff8880b872d7a8 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f11fffc CR3: 000000000df7e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rb_erase_cached include/linux/rbtree.h:126 [inline] timerqueue_del+0x83/0x150 lib/timerqueue.c:57 __remove_hrtimer+0x99/0x290 kernel/time/hrtimer.c:1109 remove_hrtimer kernel/time/hrtimer.c:1158 [inline] hrtimer_try_to_cancel+0x236/0x2f0 kernel/time/hrtimer.c:1329 update_curr_dl_se+0x3ab/0x5d0 kernel/sched/deadline.c:1509 update_curr+0x424/0x5a0 kernel/sched/fair.c:1245 entity_tick kernel/sched/fair.c:5667 [inline] task_tick_fair+0xb8/0x8e0 kernel/sched/fair.c:13050 sched_tick+0x1dd/0x4f0 kernel/sched/core.c:5652 update_process_times+0x19c/0x2d0 kernel/time/timer.c:2524 tick_sched_handle kernel/time/tick-sched.c:276 [inline] tick_nohz_handler+0x376/0x530 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x5fb/0xae0 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline] RIP: 0010:vprintk_emit+0x621/0x6f0 kernel/printk/printk.c:2431 Code: 85 ed 0f 85 81 00 00 00 e8 8c 50 20 00 9c 41 5c 41 81 e4 00 02 00 00 31 ff 4c 89 e6 e8 e8 52 20 00 4d 85 e4 0f 85 8d 00 00 00 6a 50 20 00 45 31 c9 41 b8 01 00 00 00 31 c9 48 8d 05 00 00 00 RSP: 0018:ffffc900001e7068 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 000000000000006e RCX: ffffffff816e752e RDX: ffff88801d6e0000 RSI: ffffffff816e7538 RDI: 0000000000000007 RBP: 1ffff9200003ce0f R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000200 R14: ffff888075eb4880 R15: ffffc900001e7150 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:86 _printk+0xc8/0x100 kernel/printk/printk.c:2457 br_fdb_update+0x4b4/0x7c0 net/bridge/br_fdb.c:897 br_handle_frame_finish+0xd77/0x1c80 net/bridge/br_input.c:141 br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1198 br_nf_pre_routing_finish_ipv6+0x76a/0xfb0 net/bridge/br_netfilter_ipv6.c:154 NF_HOOK include/linux/netfilter.h:314 [inline] br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:184 br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:536 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:277 [inline] br_handle_frame+0x9eb/0x1490 net/bridge/br_input.c:424 __netif_receive_skb_core.constprop.0+0xa76/0x4470 net/core/dev.c:5566 __netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5670 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5785 process_backlog+0x443/0x15f0 net/core/dev.c:6117 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6877 napi_poll net/core/dev.c:6946 [inline] net_rx_action+0xa94/0x1010 net/core/dev.c:7068 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554 run_ksoftirqd kernel/softirq.c:943 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:935 smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) net_ratelimit: 31398 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:1) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0_to_bridge with own address as source address (addr:7a:6d:47:51:dc:6b, vlan:1) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)