bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6806/1:b..l P5192/1:b..l rcu: (detected by 0, t=10502 jiffies, g=221513, q=1070 ncpus=1) task:udevd state:R running task stack:23688 pid:5192 tgid:5192 ppid:1 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:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5872 Code: 05 bb 02 29 12 83 f8 07 0f 87 f0 00 00 00 48 0f a3 05 86 62 f5 0e 0f 82 c2 02 00 00 8b 35 4e 96 f5 0e 85 f6 0f 85 dd 00 00 00 <48> 8b 44 24 30 65 48 2b 05 5d 02 29 12 0f 85 02 03 00 00 48 83 c4 RSP: 0018:ffffc90002f97520 EFLAGS: 00000206 RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff8de59aee RDI: ffffffff8c1b09a0 RBP: ffffffff8e7e74e0 R08: 000000004df2c4a4 R09: 0000000000000007 R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xd1/0x1ea0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x162/0x1e0 mm/page_owner.c:165 __reset_page_owner+0x84/0x190 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0x7e1/0x10d0 mm/page_alloc.c:2978 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xe0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4538 [inline] slab_alloc_node mm/slub.c:4866 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x2b9/0x850 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] tomoyo_realpath_from_path+0xb6/0x690 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x276/0x460 security/tomoyo/file.c:827 security_inode_getattr+0x116/0x280 security/security.c:1869 vfs_getattr fs/stat.c:259 [inline] vfs_statx_path fs/stat.c:299 [inline] vfs_statx+0x11f/0x3f0 fs/stat.c:356 vfs_fstatat+0x77/0xe0 fs/stat.c:373 __do_sys_newfstatat+0x9d/0x120 fs/stat.c:538 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: 0033:0x7f81a9f11b0a RSP: 002b:00007ffd185092e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 00005633391ab410 RCX: 00007f81a9f11b0a RDX: 00007ffd185092f0 RSI: 00005633391992a8 RDI: 00000000ffffff9c RBP: 0000563348ddb148 R08: 00063478c1c69200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd185092f0 R14: 0000000000000000 R15: 00063478c1c69200 task:syz.1.14551 state:R running task stack:25080 pid:6806 tgid:6806 ppid:5852 task_flags:0x40044c flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5298 [inline] __schedule+0xfee/0x6120 kernel/sched/core.c:6911 preempt_schedule_common+0x42/0xc0 kernel/sched/core.c:7095 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock include/linux/spinlock_api_smp.h:169 [inline] _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:389 [inline] zap_pte_range mm/memory.c:1959 [inline] zap_pmd_range mm/memory.c:2021 [inline] zap_pud_range mm/memory.c:2049 [inline] zap_p4d_range mm/memory.c:2070 [inline] unmap_page_range+0x152f/0x4840 mm/memory.c:2091 unmap_single_vma+0x153/0x240 mm/memory.c:2133 unmap_vmas+0x295/0x590 mm/memory.c:2171 exit_mmap+0x1ef/0xa30 mm/mmap.c:1302 __mmput+0x12a/0x410 kernel/fork.c:1175 mmput+0x67/0x80 kernel/fork.c:1198 exit_mm kernel/exit.c:581 [inline] do_exit+0x819/0x2b60 kernel/exit.c:964 do_group_exit+0xd5/0x2a0 kernel/exit.c:1118 get_signal+0x1ec7/0x21e0 kernel/signal.c:3034 arch_do_signal_or_restart+0x91/0x770 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline] irqentry_exit+0x1f8/0x670 kernel/entry/common.c:219 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0033:0x7f27bea50783 RSP: 002b:00007fff4d394688 EFLAGS: 00000202 RAX: 00000000824e958c RBX: ffffffff824e958c RCX: ffffffff8b84558c RDX: 000000000000158c RSI: ffffffff824e958c RDI: 0000000000000001 RBP: 000000000000065d R08: 00007f27bee00000 R09: 00007f27bee02000 R10: 00000000824e9590 R11: 0000000000000001 R12: 00007f27bee16038 R13: 00000000000343cc R14: ffffffff824e9f70 R15: 00007f27bf945720 rcu: rcu_preempt kthread starved for 10491 jiffies! g221513 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:27832 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 U I L syzkaller #0 PREEMPT(full) Tainted: [U]=USER, [I]=FIRMWARE_WORKAROUND, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: bat_events batadv_dat_purge RIP: 0010:console_flush_one_record+0xac3/0xe50 kernel/printk/printk.c:3270 Code: 00 e8 a1 1d 29 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 6f 18 21 00 48 85 ed 0f 85 d7 01 00 00 e8 81 1d 21 00 fb 4c 89 e8 <48> c1 e8 03 42 80 3c 38 00 0f 85 64 03 00 00 48 8b 0c 24 48 8b 6b RSP: 0018:ffffc90000007008 EFLAGS: 00000246 RAX: ffffffff8f514c58 RBX: ffffffff8f514c00 RCX: ffffffff81e6fad1 RDX: ffff888033301e80 RSI: ffffffff81e6fadf RDI: ffff888033301e80 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000001daf R13: ffffffff8f514c58 R14: ffffc90000007088 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88812434a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff7317afd8 CR3: 000000007dd3c000 CR4: 00000000003526f0 Call Trace: console_flush_all kernel/printk/printk.c:3343 [inline] __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0x103/0x260 kernel/printk/printk.c:3413 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479 _printk+0xcf/0x110 kernel/printk/printk.c:2504 br_fdb_update.cold+0x72/0x7e net/bridge/br_fdb.c:1003 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:6051 __netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6162 __netif_receive_skb+0x1f/0x120 net/core/dev.c:6277 process_backlog+0x37a/0x1580 net/core/dev.c:6628 __napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7692 napi_poll net/core/dev.c:7755 [inline] net_rx_action+0xa40/0xf20 net/core/dev.c:7912 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_dat_purge.part.0+0x294/0x3c0 net/batman-adv/distributed-arp-table.c:185 __batadv_dat_purge net/batman-adv/distributed-arp-table.c:166 [inline] batadv_dat_purge+0x4b/0xa0 net/batman-adv/distributed-arp-table.c:204 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 bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) net_ratelimit: 3883 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) net_ratelimit: 5643 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:30:27:3e:27:ad, vlan:0)