ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9611/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=34165, q=2832 ncpus=2)
task:syz.4.864 state:R running task stack:27768 pid:9611 tgid:9602 ppid:5826 task_flags:0x40044c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7183
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7507
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x730 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_is_watching+0x67/0xb0 kernel/rcu/tree.c:753
Code: 89 f7 e8 7c 8c 86 00 48 c7 c3 d8 e9 3e 93 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 69 11 93 11 <74> 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f e9 07 59 0b 0a cc e8 d1 0f
RSP: 0018:ffffc90004b5f478 EFLAGS: 00000286
RAX: 00000000000727c4 RBX: ffff8880b87339d8 RCX: 0000000080000001
RDX: 00000000c0065176 RSI: ffffffff8c27efe0 RDI: ffffffff8c27efa0
RBP: dffffc0000000000 R08: ffffffff81766536 R09: ffffffff8e95d020
R10: ffffc90004b5f618 R11: fffff5200096bec5 R12: ffffc90004b5f600
R13: 1ffff9200096beb9 R14: ffffffff8e276798 R15: dffffc0000000000
rcu_read_lock include/linux/rcupdate.h:839 [inline]
class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0xd5/0x2550 arch/x86/kernel/unwind_orc.c:495
__unwind_start+0x5b8/0x760 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 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+0xc2b/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]
kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4873
taskstats_tgid_alloc kernel/taskstats.c:576 [inline]
taskstats_exit+0x14a/0xa30 kernel/taskstats.c:615
do_exit+0x682/0x23c0 kernel/exit.c:947
do_group_exit+0x21b/0x2d0 kernel/exit.c:1119
get_signal+0x1284/0x1330 kernel/signal.c:3039
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:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline]
do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbaf639c819
RSP: 002b:00007fbaf73220e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fbaf6616098 RCX: 00007fbaf639c819
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbaf6616098
RBP: 00007fbaf6616090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbaf6616128 R14: 00007ffc771846d0 R15: 00007ffc771847b8
rcu: rcu_preempt kthread starved for 271 jiffies! g34165 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:27736 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7183
__schedule_loop kernel/sched/core.c:7262 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7277
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+0x514/0xb70 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 133 Comm: kworker/u8:6 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker
RIP: 0010:__sanitizer_cov_trace_switch+0x1e/0x130 kernel/kcov.c:334
Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 06 48 8b 4e 08 48 83 c1 f8 48 c1 c1 3d 48 83 f9 02 7f 1e 48 85 c9 74 3c <48> 83 f9 01 0f 85 f3 00 00 00 b9 03 00 00 00 48 85 c0 75 36 e9 e4
RSP: 0018:ffffc90000007378 EFLAGS: 00000202
RAX: 0000000000000003 RBX: 0000000000000003 RCX: 0000000000000001
RDX: 0000000000000100 RSI: ffffffff8fdc1a20 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000100 R12: 1ffff92000000ee6
R13: dffffc0000000000 R14: ffffc90000007730 R15: ffffc90000007710
FS: 0000000000000000(0000) GS:ffff888125245000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555575d324e8 CR3: 000000000e74a000 CR4: 00000000003526f0
Call Trace:
flow_keys_hash_length net/core/flow_dissector.c:1720 [inline]
__flow_hash_from_keys+0x40e/0x6e0 net/core/flow_dissector.c:1807
fib_multipath_hash_from_keys include/net/ip_fib.h:565 [inline]
rt6_multipath_hash+0x65d/0x19b0 net/ipv6/route.c:2543
ip6_route_input+0x8f6/0xad0 net/ipv6/route.c:2653
ip6_rcv_finish+0x141/0x280 net/ipv6/ip6_input.c:117
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
__netif_receive_skb_one_core net/core/dev.c:6209 [inline]
__netif_receive_skb net/core/dev.c:6322 [inline]
process_backlog+0x7dd/0x1950 net/core/dev.c:6673
__napi_poll+0xae/0x340 net/core/dev.c:7737
napi_poll net/core/dev.c:7800 [inline]
net_rx_action+0x627/0xf70 net/core/dev.c:7957
handle_softirqs+0x22a/0x840 kernel/softirq.c:622
do_softirq+0x76/0xd0 kernel/softirq.c:523
__local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
blake2s_compress+0xf9/0x1eb0 lib/crypto/x86/blake2s.h:42
blake2s_final+0x116/0x270 lib/crypto/blake2s.c:142
hmac+0x20c/0x3b0 drivers/net/wireguard/noise.c:325
kdf drivers/net/wireguard/noise.c:367 [inline]
message_ephemeral+0x255/0x310 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:3288 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3371
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3452
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
net_ratelimit: 5814 callbacks suppressed
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
net_ratelimit: 7776 callbacks suppressed
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!
ICMPv6: NA: aa:aa:aa:aa:aa:0c advertised our address fe80::a8aa:aaff:feaa:aa0c on bridge0!