bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8128/1:b..l rcu: (detected by 0, t=10502 jiffies, g=210221, q=1020 ncpus=1) task:syz-executor state:R running task stack:26808 pid:8128 tgid:8128 ppid:8088 task_flags:0x400140 flags:0x00080001 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6929 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256 irqentry_exit+0x36/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:124 [inline] RIP: 0010:lock_acquire kernel/locking/lockdep.c:5844 [inline] RIP: 0010:lock_acquire+0x127/0x350 kernel/locking/lockdep.c:5825 Code: 0d d2 45 c9 0e 85 c9 0f 84 b1 00 00 00 65 8b 05 b7 75 e4 11 85 c0 0f 85 a2 00 00 00 65 48 8b 05 f7 33 e4 11 8b 90 2c 0b 00 00 <85> d2 0f 85 8c 00 00 00 9c 8f 04 24 fa 48 c7 c7 0d 36 91 8d e8 c0 RSP: 0018:ffffc900103af830 EFLAGS: 00000246 RAX: ffff88802df70000 RBX: ffffffff8e1c2220 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff816a4671 RDI: fffffbfff1c38444 RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000082272 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4946 [inline] slab_alloc_node mm/slub.c:5245 [inline] kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5252 lsm_file_alloc security/security.c:739 [inline] security_file_alloc+0x34/0x2b0 security/security.c:2927 init_file+0x93/0x4c0 fs/file_table.c:159 alloc_empty_file+0x73/0x1e0 fs/file_table.c:241 alloc_file fs/file_table.c:354 [inline] alloc_file_pseudo+0x13a/0x230 fs/file_table.c:383 sock_alloc_file+0x50/0x210 net/socket.c:483 sock_map_fd net/socket.c:513 [inline] __sys_socket+0x1c0/0x260 net/socket.c:1756 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x72/0xb0 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6835590de7 RSP: 002b:00007ffcbb5918e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f683561296a RCX: 00007f6835590de7 RDX: 0000000000000000 RSI: 0000000000080002 RDI: 0000000000000001 RBP: 00007ffcbb591900 R08: 0000000000000008 R09: 00007ffcbb591932 R10: 0000000000000017 R11: 0000000000000246 R12: 00007ffcbb591980 R13: 00007f683561296a R14: 0000000000000009 R15: 0000000000000000 rcu: rcu_preempt kthread starved for 1297 jiffies! g210221 f0x0 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:28120 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7026 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x56a/0x730 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: CPU: 0 UID: 0 PID: 3425 Comm: kworker/R-bat_e Tainted: G U syzkaller #0 PREEMPT(full) Tainted: [U]=USER Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Workqueue: bat_events batadv_tt_purge RIP: 0010:__kernel_text_address+0x4/0x40 kernel/extable.c:78 Code: cd 09 48 c7 c7 84 ae 5f 90 e8 e8 86 9e 00 e9 6a ff ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 <53> 48 89 fb e8 e3 fe ff ff 85 c0 75 1b 48 81 fb 00 50 d6 91 72 0c RSP: 0018:ffffc90000006b70 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc90000006b90 RCX: ffffc90000006ae4 RDX: 1ffff92000000d7b RSI: ffffffff8d7feb66 RDI: ffffffff8a2768c8 RBP: ffffc90000006bd8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 000000000009325c R12: ffffffff81a5f190 R13: ffffc90000006c50 R14: 0000000000000000 R15: ffff88803092dac0 FS: 0000000000000000(0000) GS:ffff888124e6f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563490118088 CR3: 000000002a5b8000 CR4: 00000000003526f0 Call Trace: unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xa6/0x100 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 __kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2514 [inline] slab_free mm/slub.c:6566 [inline] kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6676 kfree_skbmem+0x1a4/0x1f0 net/core/skbuff.c:1110 __kfree_skb net/core/skbuff.c:1167 [inline] sk_skb_reason_drop+0x136/0x1a0 net/core/skbuff.c:1204 kfree_skb_reason include/linux/skbuff.h:1322 [inline] kfree_skb include/linux/skbuff.h:1331 [inline] ip6_mc_input+0x82c/0xf60 net/ipv6/ip6_input.c:593 dst_input include/net/dst.h:474 [inline] dst_input include/net/dst.h:472 [inline] ip6_rcv_finish+0x3df/0x580 net/ipv6/ip6_input.c:79 ip_sabotage_in+0x21e/0x290 net/bridge/br_netfilter_hooks.c:990 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xbe/0x200 net/netfilter/core.c:623 nf_hook.constprop.0+0x424/0x750 include/linux/netfilter.h:273 NF_HOOK include/linux/netfilter.h:316 [inline] ipv6_rcv+0xa4/0x650 net/ipv6/ip6_input.c:311 __netif_receive_skb_one_core+0x12d/0x1e0 net/core/dev.c:6079 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6192 netif_receive_skb_internal net/core/dev.c:6278 [inline] netif_receive_skb+0x137/0x7b0 net/core/dev.c:6337 NF_HOOK include/linux/netfilter.h:318 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] br_pass_frame_up+0x346/0x490 net/bridge/br_input.c:70 br_handle_frame_finish+0x10b7/0x1ec0 net/bridge/br_input.c:235 br_nf_hook_thresh+0x304/0x410 net/bridge/br_netfilter_hooks.c:1167 br_nf_pre_routing_finish_ipv6+0x76a/0xfc0 net/bridge/br_netfilter_ipv6.c:154 NF_HOOK include/linux/netfilter.h:318 [inline] br_nf_pre_routing_ipv6+0x3cd/0x8c0 net/bridge/br_netfilter_ipv6.c:184 br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:508 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_bridge_pre net/bridge/br_input.c:291 [inline] br_handle_frame+0xad8/0x14b0 net/bridge/br_input.c:442 __netif_receive_skb_core.constprop.0+0xa22/0x4bd0 net/core/dev.c:5966 __netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6077 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6192 process_backlog+0x439/0x15e0 net/core/dev.c:6544 __napi_poll.constprop.0+0xba/0x550 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x97f/0xef0 net/core/dev.c:7784 handle_softirqs+0x216/0x8e0 kernel/softirq.c:622 do_softirq kernel/softirq.c:523 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:510 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:450 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_tt_local_purge+0x21c/0x3c0 net/batman-adv/translation-table.c:1315 batadv_tt_purge+0x8b/0xb80 net/batman-adv/translation-table.c:3509 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] rescuer_thread+0x620/0xea0 kernel/workqueue.c:3523 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x56a/0x730 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 net_ratelimit: 4654 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) net_ratelimit: 4336 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ce:cb:27:cf:4d:2d, vlan:0)