bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9008/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=32473, q=1644 ncpus=2)
task:syz.1.634 state:R running task stack:19416 pid:9008 tgid:9008 ppid:5821 task_flags:0x400e40 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5260 [inline]
__schedule+0xfe4/0x5e10 kernel/sched/core.c:6867
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7194
irqentry_exit+0x17b/0x670 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x70 kernel/kcov.c:217
Code: dd 11 a9 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 c3 cc cc cc cc 8b 82 6c 16 00 00 85 c0 74 f1 8b 82 48 16 00 00 <83> f8 02 75 e6 48 8b 8a 50 16 00 00 8b 92 4c 16 00 00 48 8b 01 48
RSP: 0018:ffffc90004abd948 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea000162fa00 RCX: ffffffff824b0f57
RDX: ffff888043ac9e80 RSI: ffffffff824b0f65 RDI: ffff888043ac9e80
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea000162fa08
R13: 0000000000000001 R14: ffffea000162fa00 R15: dffffc0000000000
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
folio_test_swapcache include/linux/page-flags.h:634 [inline]
folio_mapping+0x165/0x250 mm/util.c:700
folio_evictable+0x5a/0x2c0 mm/internal.h:499
shrink_folio_list+0x5d0/0x6000 mm/vmscan.c:1132
evict_folios+0x7fa/0x1e90 mm/vmscan.c:4711
try_to_shrink_lruvec+0x57e/0x990 mm/vmscan.c:4874
lru_gen_shrink_lruvec mm/vmscan.c:5023 [inline]
shrink_lruvec+0x319/0x2c20 mm/vmscan.c:5784
shrink_node_memcgs mm/vmscan.c:6020 [inline]
shrink_node+0x8e0/0x3e90 mm/vmscan.c:6061
shrink_zones mm/vmscan.c:6300 [inline]
do_try_to_free_pages+0x342/0x18f0 mm/vmscan.c:6362
try_to_free_mem_cgroup_pages+0x313/0x7c0 mm/vmscan.c:6690
try_charge_memcg+0x3e3/0xc90 mm/memcontrol.c:2388
try_charge mm/memcontrol.c:2530 [inline]
charge_memcg+0xa6/0x280 mm/memcontrol.c:4728
__mem_cgroup_charge+0x2b/0x1e0 mm/memcontrol.c:4745
mem_cgroup_charge include/linux/memcontrol.h:663 [inline]
shmem_alloc_and_add_folio+0x451/0xd40 mm/shmem.c:1942
shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2556
shmem_fault+0x1f9/0xa20 mm/shmem.c:2757
__do_fault+0x10d/0x550 mm/memory.c:5323
do_read_fault mm/memory.c:5758 [inline]
do_fault+0xaf9/0x1990 mm/memory.c:5892
do_pte_missing mm/memory.c:4404 [inline]
handle_pte_fault mm/memory.c:6276 [inline]
__handle_mm_fault+0x1807/0x2b50 mm/memory.c:6414
handle_mm_fault+0x36d/0xa20 mm/memory.c:6583
faultin_page mm/gup.c:1126 [inline]
__get_user_pages+0xf9c/0x34d0 mm/gup.c:1428
__get_user_pages_locked mm/gup.c:1692 [inline]
get_dump_page+0x27e/0x3d0 mm/gup.c:2192
dump_user_range+0x18d/0xb50 fs/coredump.c:1366
elf_core_dump+0x2d16/0x3c60 fs/binfmt_elf.c:2111
coredump_write fs/coredump.c:1049 [inline]
do_coredump fs/coredump.c:1126 [inline]
vfs_coredump+0x276c/0x5530 fs/coredump.c:1200
get_signal+0x1f2a/0x21e0 kernel/signal.c:3019
arch_do_signal_or_restart+0x91/0x770 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop kernel/entry/common.c:75 [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:196
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:612
RIP: 0033:0xec
RSP: 002b:000000000000000a EFLAGS: 00010296
RAX: 00000000000000b9 RBX: 00007f8fe4616450 RCX: 00007f8fe439acb9
RDX: 000000000000b900 RSI: 0000000000000002 RDI: 0000000020003b46
RBP: 00007f8fe4408bf7 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8fe46164e8 R14: 00007f8fe4616450 R15: 00007fff7193a258
rcu: rcu_preempt kthread starved for 1175 jiffies! g32473 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:28408 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5260 [inline]
__schedule+0xfe4/0x5e10 kernel/sched/core.c:6867
__schedule_loop kernel/sched/core.c:6949 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:6964
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0xb00 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x21e/0x320 kernel/rcu/tree.c:2285
kthread+0x3b3/0x730 kernel/kthread.c:463
ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5891 Comm: kworker/0:4 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker
RIP: 0010:stack_trace_consume_entry+0x4e/0x170 kernel/stacktrace.c:86
Code: 04 02 84 c0 74 08 3c 03 0f 8e e7 00 00 00 48 8d 7b 08 8b 6b 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e ad 00 00 00 31 c0 3b 6b 08 0f 83 81 00 00
RSP: 0018:ffffc90000006f28 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffc90000007008 RCX: ffffc90000006e9c
RDX: 1ffff92000000e02 RSI: ffffffff81c727aa RDI: ffffc90000007010
RBP: 0000000000000013 R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000084b30 R12: ffffffff81f10c60
R13: ffffc90000007008 R14: 0000000000000000 R15: ffff88802fe28000
FS: 0000000000000000(0000) GS:ffff8881245e3000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000093d000 CR3: 000000000e392000 CR4: 00000000003526f0
Call Trace:
arch_stack_walk+0x88/0xf0 arch/x86/kernel/stacktrace.c:27
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
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4953 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x2ad/0x780 mm/slub.c:5270
skb_clone+0x190/0x400 net/core/skbuff.c:2088
deliver_clone net/bridge/br_forward.c:125 [inline]
maybe_deliver+0xd4/0x180 net/bridge/br_forward.c:191
br_flood+0x193/0x650 net/bridge/br_forward.c:238
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+0xa68/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core.constprop.0+0x6d7/0x3460 net/core/dev.c:6039
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6150
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6265
process_backlog+0x37a/0x1580 net/core/dev.c:6617
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7681
napi_poll net/core/dev.c:7744 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:7896
handle_softirqs+0x1ea/0x910 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_update+0xef/0x320 lib/crypto/blake2s.c:119
hmac.constprop.0+0x24a/0x480 drivers/net/wireguard/noise.c:324
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_response+0x342/0x5f0 drivers/net/wireguard/noise.c:697
wg_packet_send_handshake_response+0xe3/0x310 drivers/net/wireguard/send.c:94
wg_receive_handshake_packet+0x7dd/0xc20 drivers/net/wireguard/receive.c:154
wg_packet_handshake_receive_worker+0x15e/0x370 drivers/net/wireguard/receive.c:213
process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
kthread+0x3b3/0x730 kernel/kthread.c:463
ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
net_ratelimit: 9392 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 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 veth0_to_bridge with own address as source address (addr:5a:8d:7f:92:1f:46, 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: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)
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:5a:8d:7f:92:1f:46, vlan:0)