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): P26919/1:b..l rcu: (detected by 0, t=10502 jiffies, g=219825, q=1390 ncpus=1) task:syz-executor state:R running task stack:23784 pid:26919 tgid:26919 ppid:26913 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5298 [inline] __schedule+0xfee/0x6120 kernel/sched/core.c:6911 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7238 irqentry_exit+0x17b/0x670 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:debug_lockdep_rcu_enabled+0x26/0x40 kernel/rcu/update.c:320 Code: 90 90 90 90 f3 0f 1e fa 8b 05 82 7f 4b 05 85 c0 74 20 8b 05 60 b2 4b 05 85 c0 74 16 65 48 8b 05 88 80 7f 08 8b 80 54 0b 00 00 <85> c0 0f 94 c0 0f b6 c0 e9 3d 2c 03 00 66 2e 0f 1f 84 00 00 00 00 RSP: 0018:ffffc9000417f610 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffffc9000417f6f0 RCX: ffffffff8b8c85a6 RDX: 0000000000000039 RSI: ffffffff8b8c85b5 RDI: ffff8880460781d0 RBP: ffffea00020db780 R08: 0000000000000001 R09: 0000000000000040 R10: 0000000000000035 R11: 0000000000000000 R12: fffffffffffffffe R13: ffffc9000417f702 R14: 0000000000000035 R15: dffffc0000000000 xa_entry include/linux/xarray.h:1226 [inline] xas_find+0x2d8/0x8e0 lib/xarray.c:1423 find_get_entry mm/filemap.c:2067 [inline] find_lock_entries+0x16e/0x1130 mm/filemap.c:2171 shmem_undo_range+0x212/0x1570 mm/shmem.c:1131 shmem_truncate_range mm/shmem.c:1277 [inline] shmem_evict_inode+0x39e/0xbd0 mm/shmem.c:1407 evict+0x3c2/0xad0 fs/inode.c:846 iput_final fs/inode.c:1966 [inline] iput.part.0+0x605/0xf50 fs/inode.c:2015 iput+0x35/0x40 fs/inode.c:1981 filename_unlinkat+0x466/0x730 fs/namei.c:5550 __do_sys_unlink fs/namei.c:5581 [inline] __se_sys_unlink fs/namei.c:5578 [inline] __x64_sys_unlink+0x46/0x70 fs/namei.c:5578 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2a46f9b907 RSP: 002b:00007fffeda21618 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2a46f9b907 RDX: 00007fffeda21640 RSI: 00007fffeda216d0 RDI: 00007fffeda216d0 RBP: 00007fffeda216d0 R08: 00007fffeda226d0 R09: 00000000ffffffff R10: 0000000000000100 R11: 0000000000000206 R12: 00007fffeda22760 R13: 00007f2a47032048 R14: 0000000000147193 R15: 00007fffeda227a0 rcu: rcu_preempt kthread starved for 507 jiffies! g219825 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:27736 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5298 [inline] __schedule+0xfee/0x6120 kernel/sched/core.c:6911 __schedule_loop kernel/sched/core.c:6993 [inline] schedule+0xdd/0x390 kernel/sched/core.c:7008 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x754/0xd80 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: 3407 Comm: kworker/R-bat_e Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: bat_events batadv_tt_purge RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 96 16 53 f6 48 89 df e8 7e 66 53 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 35 87 43 f6 65 8b 05 5e 9e 7c 08 85 c0 74 16 5b RSP: 0018:ffffc900000072c8 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffffffff9061ae00 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffffffff8de83046 RDI: ffffffff8c1b1da0 RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff9061ae44 R14: ffffffff8cf28f80 R15: ffffffff9061ae48 FS: 0000000000000000(0000) GS:ffff888124340000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fc85e64a38 CR3: 000000000e598000 CR4: 00000000003526f0 Call Trace: ___ratelimit+0x5bd/0xad0 lib/ratelimit.c:97 br_fdb_update+0x43b/0x720 net/bridge/br_fdb.c:1002 br_handle_frame_finish+0xe9a/0x1f60 net/bridge/br_input.c:144 br_nf_hook_thresh+0x30d/0x420 net/bridge/br_netfilter_hooks.c:1167 br_nf_pre_routing_finish_ipv6+0x769/0xfb0 net/bridge/br_netfilter_ipv6.c:154 NF_HOOK include/linux/netfilter.h:318 [inline] br_nf_pre_routing_ipv6+0x39c/0x8b0 net/bridge/br_netfilter_ipv6.c:184 br_nf_pre_routing+0x90d/0x1550 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+0xcdd/0x1520 net/bridge/br_input.c:442 __netif_receive_skb_core.constprop.0+0x6c5/0x3550 net/core/dev.c:6068 __netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6179 __netif_receive_skb+0x1f/0x120 net/core/dev.c:6294 process_backlog+0x37a/0x1580 net/core/dev.c:6645 __napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7709 napi_poll net/core/dev.c:7772 [inline] net_rx_action+0xa40/0xf20 net/core/dev.c:7929 handle_softirqs+0x1eb/0x9e0 kernel/softirq.c:622 do_softirq kernel/softirq.c:523 [inline] do_softirq+0xac/0xe0 kernel/softirq.c:510 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450 spin_unlock_bh include/linux/spinlock.h:395 [inline] batadv_tt_local_purge+0x21c/0x3d0 net/batman-adv/translation-table.c:1315 batadv_tt_purge+0x8b/0xbd0 net/batman-adv/translation-table.c:3509 process_one_work+0xa23/0x19a0 kernel/workqueue.c:3276 process_scheduled_works kernel/workqueue.c:3359 [inline] rescuer_thread+0x905/0x14a0 kernel/workqueue.c:3583 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 net_ratelimit: 13623 callbacks suppressed 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 veth0_to_bridge with own address as source address (addr:e6:05:02:0d:08:11, 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:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:05:02:0d:08:11, 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 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 bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 13192 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:05:02:0d:08:11, 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:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:05:02:0d:08:11, 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 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 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:e6:05:02:0d:08:11, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)