bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5199/1:b..l rcu: (detected by 0, t=10502 jiffies, g=246741, q=2462 ncpus=1) task:udevd state:R running task stack:24728 pid:5199 tgid:5199 ppid:1 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:697 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x10/0x70 kernel/kcov.c:217 Code: 00 00 5b e9 c2 93 e5 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 65 48 8b 15 78 d8 e4 11 <65> 8b 05 89 d8 e4 11 a9 00 01 ff 00 74 1d f6 c4 01 74 43 a9 00 00 RSP: 0018:ffffc90003337750 EFLAGS: 00000202 RAX: fffffbfff3567710 RBX: 0000000000023750 RCX: ffffffff822fc1b3 RDX: ffff8880747b3c80 RSI: ffffffff822fc1e3 RDI: 0000000000000007 RBP: 0000000000000002 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000003750 R11: 0000000000000001 R12: ffff88801c514900 R13: ffff88801c5148fc R14: 0000000000000001 R15: dffffc0000000000 __page_table_check_zero+0x303/0x5d0 mm/page_table_check.c:139 page_table_check_free include/linux/page_table_check.h:43 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0x7d0/0x1160 mm/page_alloc.c:2901 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4978 [inline] slab_alloc_node mm/slub.c:5288 [inline] __do_kmalloc_node mm/slub.c:5649 [inline] __kmalloc_noprof+0x2e8/0x880 mm/slub.c:5662 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] tomoyo_encode2+0x100/0x3e0 security/tomoyo/realpath.c:45 tomoyo_encode+0x29/0x50 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x18f/0x6e0 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x274/0x460 security/tomoyo/file.c:822 security_inode_getattr+0x116/0x290 security/security.c:2416 vfs_getattr fs/stat.c:259 [inline] vfs_statx_path fs/stat.c:299 [inline] vfs_statx+0x121/0x3f0 fs/stat.c:356 vfs_fstatat+0x7b/0xf0 fs/stat.c:375 __do_sys_newfstatat+0x97/0x120 fs/stat.c:542 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5c81d11b0a RSP: 002b:00007ffc14efae08 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 0000560900937410 RCX: 00007f5c81d11b0a RDX: 00007ffc14efae10 RSI: 00005609009252a8 RDI: 00000000ffffff9c RBP: 000056091df9d148 R08: 00063478c1c69200 R09: 00007f5c82401000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc14efae10 R14: 0000000000000000 R15: 00063478c1c69200 rcu: rcu_preempt kthread starved for 985 jiffies! g246741 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:28392 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+0x675/0x7d0 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: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker RIP: 0010:unwind_next_frame+0x522/0x20a0 arch/x86/kernel/unwind_orc.c:505 Code: 00 00 fc ff df 4c 8d 79 05 4c 89 fa 48 c1 ea 03 0f b6 04 02 4c 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 63 15 00 00 0f b6 41 05 <83> e0 07 0f 84 53 fe ff ff 3c 01 0f 84 7b fe ff ff 4c 8d 41 04 4c RSP: 0018:ffffc90000007600 EFLAGS: 00000246 RAX: 0000000000000002 RBX: 0000000000000002 RCX: ffffffff91a5d314 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff90f320f0 RBP: ffffc900000076b8 R08: ffffffff91a5d31a R09: 0000000000000000 R10: 0000000000000000 R11: 000000000008321e R12: ffffc900000076c0 R13: ffffc90000007670 R14: ffffc900000076a5 R15: ffffffff91a5d319 FS: 0000000000000000(0000) GS:ffff888124a0d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0da49ffffc CR3: 000000003713e000 CR4: 00000000003526f0 Call Trace: 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 __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:2543 [inline] slab_free mm/slub.c:6642 [inline] kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6752 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 net/ipv6/ip6_input.c:79 [inline] NF_HOOK include/linux/netfilter.h:318 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] ipv6_rcv+0x497/0x650 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 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+0x219/0x8e0 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 local_bh_enable include/linux/bottom_half.h:33 [inline] fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline] kernel_fpu_end+0x5e/0x70 arch/x86/kernel/fpu/core.c:479 blake2s_compress+0x7b/0xe0 lib/crypto/x86/blake2s.h:44 blake2s_update+0xef/0x360 lib/crypto/blake2s.c:126 hmac.constprop.0+0x23f/0x420 drivers/net/wireguard/noise.c:324 kdf.constprop.0+0x122/0x280 drivers/net/wireguard/noise.c:360 mix_precomputed_dh drivers/net/wireguard/noise.c:426 [inline] wg_noise_handshake_create_initiation+0x406/0x610 drivers/net/wireguard/noise.c:560 wg_packet_send_handshake_initiation+0x19a/0x360 drivers/net/wireguard/send.c:34 wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 net_ratelimit: 2387 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) net_ratelimit: 3246 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:d3:3f:98:a3:f4, vlan:0)