KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
c8afbb7b-b66b-415d-bb51-d4501b56da7f	assessment-kcsan		💥	KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation (4)	2026/03/06 11:06	2026/03/06 11:06	2026/03/06 11:27	31e9c887f7dc24e04b3ca70d0d54fc34141844b0	Error 429, Message: You exceeded your current quota, please check your plan and billing details. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits. To monitor your current usage, head to: https://ai.dev/rate-limit. , Status: RESOURCE_EXHAUSTED, Details: [map[@type:type.googleapis.com/google.rpc.Help links:[map[description:Learn more about Gemini API quotas url:https://ai.google.dev/gemini-api/docs/rate-limits]]] map[@type:type.googleapis.com/google.rpc.DebugInfo detail:[ORIGINAL ERROR] generic::resource_exhausted: You exceeded your current quota, please check your plan and billing details. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits. To monitor your current usage, head to: https://ai.dev/rate-limit. [google.rpc.error_details_ext] { message: "You exceeded your current quota, please check your plan and billing details. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits. To monitor your current usage, head to: https://ai.dev/rate-limit. " details { type_url: "type.googleapis.com/language_labs.genai.debug.GeminiApiDebugInfo" value: "R\212\001\n\207\001\nTgenerativelanguage.googleapis.com/generate_content_paid_tier_1_input_tokens_internal\022\022\n\010location\022\006global\022\027\n\005model\022\016gemini-3-flash\030\300\204=" } details { [type.googleapis.com/google.rpc.Help] { links { description: "Learn more about Gemini API quotas" url: "https://ai.google.dev/gemini-api/docs/rate-limits" } } } }]]

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation wireguard	6	1	327d	327d	0/29	auto-obsoleted due to no activity on 2025/06/08 20:20
upstream	KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation (2) wireguard	6	1	134d	134d	0/29	auto-obsoleted due to no activity on 2025/12/18 18:21
upstream	KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation (3) wireguard	6	2	63d	59d	0/29	auto-obsoleted due to no activity on 2026/02/28 13:08

Kernel

Title

Rank 🛈

upstream

KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation wireguard

327d

0/29

auto-obsoleted due to no activity on 2025/06/08 20:20

upstream

KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation (2) wireguard

134d

0/29

auto-obsoleted due to no activity on 2025/12/18 18:21

upstream

KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation (3) wireguard

63d

59d

0/29

auto-obsoleted due to no activity on 2026/02/28 13:08

================================================================== BUG: KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation read to 0xffff88810b667808 of 4 bytes by interrupt on cpu 0: wg_expired_retransmit_handshake+0x2a/0x160 drivers/net/wireguard/timers.c:46 call_timer_fn+0x3b/0x2a0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x426/0x620 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0x31/0x70 kernel/time/timer.c:2404 handle_softirqs+0xb9/0x2a0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x39/0xc0 kernel/softirq.c:723 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x74/0x80 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:62 arch_safe_halt arch/x86/kernel/process.c:766 [inline] default_idle+0x9/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x3b/0x60 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0xcd/0x230 kernel/sched/idle.c:332 cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:430 rest_init+0xee/0xf0 init/main.c:760 start_kernel+0x49a/0x4c0 init/main.c:1210 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0xfc/0x100 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x147 write to 0xffff88810b667808 of 4 bytes by interrupt on cpu 1: wg_packet_send_queued_handshake_initiation+0x32/0x180 drivers/net/wireguard/send.c:59 wg_expired_new_handshake+0x26/0x30 drivers/net/wireguard/timers.c:104 call_timer_fn+0x3b/0x2a0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x426/0x620 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0x31/0x70 kernel/time/timer.c:2404 handle_softirqs+0xb9/0x2a0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x39/0xc0 kernel/softirq.c:723 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x74/0x80 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:62 arch_safe_halt arch/x86/kernel/process.c:766 [inline] default_idle+0x9/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x3b/0x60 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0xcd/0x230 kernel/sched/idle.c:332 cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:430 start_secondary+0x95/0xa0 arch/x86/kernel/smpboot.c:312 common_startup_64+0x13e/0x147 value changed: 0x00000002 -> 0x00000003 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/03/06 10:58	upstream	5ee8dbf54602	31e9c887	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in wg_expired_retransmit_handshake / wg_packet_send_queued_handshake_initiation

Crashes (1):

Assets (help?)