bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:3e:a7:b6:ca:4f, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10513/1:b..l P5827/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=34189, q=908 ncpus=2)
task:syz-executor    state:R  running task     stack:22336 pid:5827  tgid:5827  ppid:5818   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5298 [inline]
 __schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7238
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
Code: e9 30 ff ff ff e8 85 f4 0d 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 01 02 7b 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d be 95 73
RSP: 0018:ffffc90003eb7608 EFLAGS: 00000282
RAX: af416f31a7496300 RBX: 0000000000000246 RCX: 0000000000000046
RDX: 00000000cfdf5305 RSI: ffffffff8e16b4fa RDI: ffffffff8c27d100
RBP: 0000000000000000 R08: ffffffff823c375a R09: ffffffff8e75e5e0
R10: dffffc0000000000 R11: ffffed1007d68cee R12: 0000000000000002
R13: ffffffff8e75e5e0 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 __page_table_check_zero+0x87/0x3e0 mm/page_table_check.c:138
 page_table_check_free include/linux/page_table_check.h:46 [inline]
 __free_pages_prepare mm/page_alloc.c:1434 [inline]
 __free_frozen_pages+0xc3b/0xdb0 mm/page_alloc.c:2978
 __slab_free+0x263/0x2b0 mm/slub.c:5573
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 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+0x316/0x760 mm/slub.c:5272
 kmalloc_noprof include/linux/slab.h:954 [inline]
 tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x283/0x560 security/tomoyo/file.c:827
 security_inode_getattr+0x12b/0x310 security/security.c:1870
 vfs_getattr+0x23/0x70 fs/stat.c:259
 vfs_statx_path+0x2b/0x230 fs/stat.c:299
 vfs_statx+0x12e/0x200 fs/stat.c:356
 vfs_fstatat+0x11b/0x170 fs/stat.c:373
 __do_sys_newfstatat fs/stat.c:538 [inline]
 __se_sys_newfstatat fs/stat.c:532 [inline]
 __x64_sys_newfstatat+0x151/0x200 fs/stat.c:532
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1873f9ae5a
RSP: 002b:00007ffe8548e048 EFLAGS: 00000286 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007f1874032048 RCX: 00007f1873f9ae5a
RDX: 00007ffe8548e070 RSI: 00007ffe8548e100 RDI: 00000000ffffff9c
RBP: 00007ffe8548e100 R08: 00007ffe8548f100 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000286 R12: 00007ffe8548f190
R13: 00007f1874032048 R14: 0000000000035d65 R15: 00007ffe8548f1d0
 </TASK>
task:syz.3.1244      state:R  running task     stack:25600 pid:10513 tgid:10513 ppid:5831   task_flags:0x40044c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5298 [inline]
 __schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
 preempt_schedule_common+0x82/0xd0 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+0x3f/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+0x3b71/0x48f0 mm/memory.c:2091
 unmap_single_vma mm/memory.c:2133 [inline]
 unmap_vmas+0x48f/0x6a0 mm/memory.c:2171
 exit_mmap+0x280/0xa10 mm/mmap.c:1302
 __mmput+0x118/0x430 kernel/fork.c:1175
 exit_mm+0x168/0x220 kernel/exit.c:581
 do_exit+0x6a2/0x23c0 kernel/exit.c:964
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1118
 get_signal+0x1284/0x1330 kernel/signal.c:3034
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa2fb99c819
RSP: 002b:00007ffd4d2639a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fa2fbc17da0 RCX: 00007fa2fb99c819
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fa2fbc17da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00000000003ffce0 R11: 0000000000000246 R12: 0000000000035e6a
R13: 00007fa2fbc1609c R14: 0000000000035cf3 R15: 00007fa2fbc16090
 </TASK>
rcu: rcu_preempt kthread starved for 8322 jiffies! g34189 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:27648 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5298 [inline]
 __schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
 __schedule_loop kernel/sched/core.c:6993 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7008
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 49 Comm: kworker/u8:3 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
RIP: 0010:unwind_get_return_address+0x56/0x90 arch/x86/kernel/unwind_orc.c:385
Code: 83 c3 48 49 89 df 49 c1 ef 03 43 80 3c 37 00 74 08 48 89 df e8 0b 85 b9 00 48 8b 3b e8 83 6f 19 00 85 c0 74 14 43 80 3c 37 00 <74> 08 48 89 df e8 f0 84 b9 00 48 8b 03 eb 02 31 c0 5b 41 5e 41 5f
RSP: 0018:ffffc90000005b48 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffc90000005bb0 RCX: 0000000080000300
RDX: 0000000000000001 RSI: ffffffff8e16b4fa RDI: ffffffff822ffaa6
RBP: ffffc90000005bf0 R08: ffffc90000005ed0 R09: 0000000000000000
R10: ffffc90000005bb8 R11: fffff52000000b79 R12: ffff8880206b0000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000000b76
FS:  0000000000000000(0000) GS:ffff888125457000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558bc804e8 CR3: 000000005ac28000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2685 [inline]
 slab_free mm/slub.c:6165 [inline]
 kmem_cache_free+0x187/0x630 mm/slub.c:6295
 skb_ext_reset include/linux/skbuff.h:5090 [inline]
 skb_scrub_packet+0x2c8/0x3d0 net/core/skbuff.c:6269
 ____dev_forward_skb include/linux/netdevice.h:4391 [inline]
 __dev_forward_skb2+0x28f/0x740 net/core/dev.c:2440
 veth_forward_skb drivers/net/veth.c:323 [inline]
 veth_xmit+0x469/0xda0 drivers/net/veth.c:379
 __netdev_start_xmit include/linux/netdevice.h:5325 [inline]
 netdev_start_xmit include/linux/netdevice.h:5334 [inline]
 xmit_one net/core/dev.c:3888 [inline]
 dev_hard_start_xmit+0x2d8/0x870 net/core/dev.c:3904
 __dev_queue_xmit+0x16d1/0x3890 net/core/dev.c:4854
 dev_queue_xmit include/linux/netdevice.h:3385 [inline]
 br_dev_queue_push_xmit+0x370/0x4a0 net/bridge/br_forward.c:53
 NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:318
 br_nf_post_routing+0xb66/0xfe0 net/bridge/br_netfilter_hooks.c:966
 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
 nf_hook_slow+0xc5/0x220 net/netfilter/core.c:623
 nf_hook include/linux/netfilter.h:273 [inline]
 NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316
 br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66
 br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1167 [inline]
 br_nf_forward_finish+0xa5e/0xe90 net/bridge/br_netfilter_hooks.c:662
 NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:318
 br_nf_forward_ip+0x7ef/0xa30 net/bridge/br_netfilter_hooks.c:716
 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
 nf_hook_slow+0xc5/0x220 net/netfilter/core.c:623
 nf_hook include/linux/netfilter.h:273 [inline]
 NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316
 __br_forward+0x397/0x540 net/bridge/br_forward.c:115
 deliver_clone net/bridge/br_forward.c:131 [inline]
 maybe_deliver net/bridge/br_forward.c:191 [inline]
 br_flood+0x6ee/0xb80 net/bridge/br_forward.c:238
 br_handle_frame_finish+0x14c2/0x1bb0 net/bridge/br_input.c:229
 br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
 br_nf_pre_routing_finish_ipv6+0xa3a/0xd70 net/bridge/br_netfilter_ipv6.c:-1
 NF_HOOK include/linux/netfilter.h:318 [inline]
 br_nf_pre_routing_ipv6+0x374/0x6f0 net/bridge/br_netfilter_ipv6.c:184
 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
 br_handle_frame+0x1277/0x1510 net/bridge/br_input.c:442
 __netif_receive_skb_core+0x98f/0x31a0 net/core/dev.c:6068
 __netif_receive_skb_list_core+0x24d/0x810 net/core/dev.c:6256
 __netif_receive_skb_list net/core/dev.c:6323 [inline]
 netif_receive_skb_list_internal+0x995/0xcf0 net/core/dev.c:6414
 gro_normal_list include/net/gro.h:523 [inline]
 gro_normal_one include/net/gro.h:543 [inline]
 gro_skb_finish net/core/gro.c:603 [inline]
 gro_receive_skb+0x632/0xd40 net/core/gro.c:633
 napi_gro_receive include/linux/netdevice.h:4254 [inline]
 veth_xdp_rcv drivers/net/veth.c:939 [inline]
 veth_poll+0x277a/0x40d0 drivers/net/veth.c:978
 __napi_poll+0xae/0x340 net/core/dev.c:7709
 napi_poll net/core/dev.c:7772 [inline]
 net_rx_action+0x627/0xf70 net/core/dev.c:7929
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 do_softirq+0x76/0xd0 kernel/softirq.c:523
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
 blake2s_compress+0xf9/0x1eb0 lib/crypto/x86/blake2s.h:42
 blake2s_update+0x14b/0x450 lib/crypto/blake2s.c:119
 hmac+0x2d3/0x3b0 drivers/net/wireguard/noise.c:332
 kdf drivers/net/wireguard/noise.c:360 [inline]
 message_ephemeral+0x233/0x310 drivers/net/wireguard/noise.c:493
 wg_noise_handshake_create_initiation+0x257/0x830 drivers/net/wireguard/noise.c:545
 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline]
 wg_packet_handshake_send_worker+0x18d/0x350 drivers/net/wireguard/send.c:51
 process_one_work kernel/workqueue.c:3276 [inline]
 process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:3e:a7:b6:ca:4f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:3e:a7:b6:ca:4f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:3e:a7:b6:ca:4f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:3e:a7:b6:ca:4f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:3e:a7:b6:ca:4f, vlan:0)