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 veth0_to_bridge with own address as source address (addr:52:12:7c:6f:35:5b, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P27349/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=230273, q=1866 ncpus=1)
task:syz-executor state:R running task stack:24264 pid:27349 tgid:27349 ppid:27340 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x60e0 kernel/sched/core.c:6907
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7234
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 7b ae 28 12 83 f8 07 0f 87 f0 00 00 00 48 0f a3 05 46 47 f5 0e 0f 82 c2 02 00 00 8b 35 0e 7b f5 0e 85 f6 0f 85 dd 00 00 00 <48> 8b 44 24 30 65 48 2b 05 1d ae 28 12 0f 85 02 03 00 00 48 83 c4
RSP: 0018:ffffc900049befd8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffffff8de5414a RDI: ffffffff8c1aeb20
RBP: ffffffff8e7e9220 R08: 0000000096177751 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:4501 [inline]
slab_alloc_node mm/slub.c:4830 [inline]
kmem_cache_alloc_noprof+0x241/0x6e0 mm/slub.c:4837
ptlock_alloc+0x1f/0x70 mm/memory.c:7456
ptlock_init include/linux/mm.h:3494 [inline]
pagetable_pte_ctor include/linux/mm.h:3548 [inline]
__pte_alloc_one_noprof include/asm-generic/pgalloc.h:79 [inline]
pte_alloc_one+0x84/0x3e0 arch/x86/mm/pgtable.c:18
__pte_alloc+0x6d/0x3f0 mm/memory.c:466
copy_pte_range mm/memory.c:1250 [inline]
copy_pmd_range mm/memory.c:1405 [inline]
copy_pud_range mm/memory.c:1442 [inline]
copy_p4d_range mm/memory.c:1466 [inline]
copy_page_range+0x3e51/0x6570 mm/memory.c:1552
dup_mmap+0xd25/0x2180 mm/mmap.c:1841
dup_mm kernel/fork.c:1530 [inline]
copy_mm kernel/fork.c:1582 [inline]
copy_process+0x73d7/0x7a10 kernel/fork.c:2223
kernel_clone+0xfc/0x9a0 kernel/fork.c:2654
__do_sys_clone+0xd9/0x120 kernel/fork.c:2795
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: 0033:0x7f4b1f9c50d2
RSP: 002b:00007ffe5cef4a40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe5cef4a40 RCX: 00007f4b1f9c50d2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe5cef4bcc R08: 0000000000000000 R09: 0000000000000001
R10: 000055557f8577d0 R11: 0000000000000246 R12: 0000000000000001
R13: 000000000000003b R14: 00000000001a9710 R15: 00007ffe5cef4c20
rcu: rcu_preempt kthread starved for 386 jiffies! g230273 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:28680 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x60e0 kernel/sched/core.c:6907
__schedule_loop kernel/sched/core.c:6989 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7004
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:467
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: 14705 Comm: kworker/u10:4 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker
RIP: 0010:lock_acquire+0x7b/0x380 kernel/locking/lockdep.c:5872
Code: 35 0e 7b f5 0e 85 f6 0f 85 dd 00 00 00 48 8b 44 24 30 65 48 2b 05 1d ae 28 12 0f 85 02 03 00 00 48 83 c4 38 5b 5d 41 5c 41 5d <41> 5e 41 5f c3 cc cc cc cc 65 8b 05 29 ae 28 12 83 f8 07 0f 87 9c
RSP: 0018:ffffc900000064d8 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000009
RDX: 0000000000000000 RSI: ffffffff8de5414a RDI: ffffffff8c1aeb20
RBP: ffffc900000065b0 R08: 000000002cea31c8 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: ffffffff81f2a7b0
R13: ffffc90000006568 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888124351000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb2ca2fc0 CR3: 000000000e598000 CR4: 00000000003526f0
Call Trace:
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
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2687 [inline]
slab_free mm/slub.c:6124 [inline]
kmem_cache_free+0x124/0x6a0 mm/slub.c:6254
__skb_ext_put+0x102/0x2f0 net/core/skbuff.c:7239
skb_ext_reset include/linux/skbuff.h:5090 [inline]
skb_ext_reset include/linux/skbuff.h:5087 [inline]
skb_scrub_packet+0x377/0x430 net/core/skbuff.c:6259
____dev_forward_skb include/linux/netdevice.h:4358 [inline]
__dev_forward_skb2+0x38a/0x740 net/core/dev.c:2440
veth_forward_skb drivers/net/veth.c:323 [inline]
veth_xmit+0x2c2/0xe90 drivers/net/veth.c:379
__netdev_start_xmit include/linux/netdevice.h:5275 [inline]
netdev_start_xmit include/linux/netdevice.h:5284 [inline]
xmit_one net/core/dev.c:3871 [inline]
dev_hard_start_xmit+0x121/0x7d0 net/core/dev.c:3887
__dev_queue_xmit+0x6dd/0x4750 net/core/dev.c:4836
dev_queue_xmit include/linux/netdevice.h:3384 [inline]
br_dev_queue_push_xmit+0x360/0x550 net/bridge/br_forward.c:53
br_nf_dev_queue_xmit+0x741/0x2a20 net/bridge/br_netfilter_hooks.c:920
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
br_nf_post_routing+0xcbb/0x16a0 net/bridge/br_netfilter_hooks.c:966
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xbf/0x220 net/netfilter/core.c:623
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK include/linux/netfilter.h:316 [inline]
br_forward_finish+0x261/0x4d0 net/bridge/br_forward.c:66
br_nf_hook_thresh+0x30d/0x420 net/bridge/br_netfilter_hooks.c:1167
br_nf_forward_finish+0x693/0xb30 net/bridge/br_netfilter_hooks.c:662
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
br_nf_forward_ip.part.0+0x61e/0x820 net/bridge/br_netfilter_hooks.c:716
br_nf_forward_ip net/bridge/br_netfilter_hooks.c:676 [inline]
br_nf_forward+0xfe5/0x19f0 net/bridge/br_netfilter_hooks.c:773
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xbf/0x220 net/netfilter/core.c:623
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK include/linux/netfilter.h:316 [inline]
__br_forward+0x2f6/0x970 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
br_flood+0x37f/0x650 net/bridge/br_forward.c:250
br_handle_frame_finish+0xf57/0x1f00 net/bridge/br_input.c:229
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+0x93b/0x1510 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:6043
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6154
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6269
process_backlog+0x37a/0x1580 net/core/dev.c:6621
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7685
napi_poll net/core/dev.c:7748 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:7900
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
local_bh_enable include/linux/bottom_half.h:33 [inline]
fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline]
kernel_fpu_end arch/x86/kernel/fpu/core.c:506 [inline]
kernel_fpu_end+0x64/0x80 arch/x86/kernel/fpu/core.c:499
blake2s_compress+0x78/0xf0 lib/crypto/x86/blake2s.h:42
blake2s_final+0xc9/0x150 lib/crypto/blake2s.c:142
hmac.constprop.0+0x25d/0x480 drivers/net/wireguard/noise.c:325
kdf.constprop.0+0x128/0x280 drivers/net/wireguard/noise.c:360
mix_dh+0xd2/0x130 drivers/net/wireguard/noise.c:413
wg_noise_handshake_create_initiation+0x337/0x610 drivers/net/wireguard/noise.c:550
wg_packet_send_handshake_initiation+0x19c/0x360 drivers/net/wireguard/send.c:34
wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
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: 5349 callbacks suppressed
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:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:52:12:7c:6f:35:5b, 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:52:12:7c:6f:35:5b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:52:12:7c:6f:35:5b, 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 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: 8188 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:52:12:7c:6f:35:5b, 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:52:12:7c:6f:35:5b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:52:12:7c:6f:35:5b, 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 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 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)