KCSAN: data-race in begin_new_exec / cgroup_task

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
5d5b15eb-1140-4e9b-af10-a2f355cb111b	assessment-kcsan	Benign: ✅ Confident: ✅	❓	KCSAN: data-race in begin_new_exec / cgroup_task_dead	2026/02/24 20:56	2026/02/24 20:56	2026/02/24 21:06	305c0ec5cd886e2d13738e28e1b2df9b0ec20fc9
fb606151-bdf2-4095-be8e-3759b5540bf6	assessment-kcsan		💥	KCSAN: data-race in begin_new_exec / cgroup_task_dead	2026/01/10 03:12	2026/01/10 03:12	2026/01/10 03:12	7519916073b761ced56a7b15fdeeb4674e8dc125	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. * Quota exceeded for metric: generativelanguage.googleapis.com/generate_requests_per_model_per_day, limit: 0, 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.QuotaFailure violations:[map[quotaId:GenerateRequestsPerDayPerProjectPerModel quotaMetric:generativelanguage.googleapis.com/generate_requests_per_model_per_day]]] 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. * Quota exceeded for metric: generativelanguage.googleapis.com/generate_requests_per_model_per_day, limit: 0 [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. \n* Quota exceeded for metric: generativelanguage.googleapis.com/generate_requests_per_model_per_day, limit: 0" details { type_url: "type.googleapis.com/language_labs.genai.debug.GeminiApiDebugInfo" value: "RM\nK\nEgenerativelanguage.googleapis.com/generate_requests_per_model_per_day\030\000\"\000" } 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" } } } details { [type.googleapis.com/google.rpc.QuotaFailure] { violations { quota_metric: "generativelanguage.googleapis.com/generate_requests_per_model_per_day" quota_id: "GenerateRequestsPerDayPerProjectPerModel" } } } }]]

================================================================== BUG: KCSAN: data-race in begin_new_exec / cgroup_task_dead write to 0xffff888103852630 of 4 bytes by task 9822 on cpu 0: de_thread fs/exec.c:1007 [inline] begin_new_exec+0x8eb/0x12a0 fs/exec.c:1123 load_elf_binary+0x6a3/0x1c90 fs/binfmt_elf.c:1010 search_binary_handler fs/exec.c:1669 [inline] exec_binprm fs/exec.c:1701 [inline] bprm_execve+0x477/0x9b0 fs/exec.c:1753 do_execveat_common+0x6e6/0x750 fs/exec.c:1859 do_execveat fs/exec.c:1944 [inline] __do_sys_execveat fs/exec.c:2018 [inline] __se_sys_execveat fs/exec.c:2012 [inline] __x64_sys_execveat+0x73/0x90 fs/exec.c:2012 x64_sys_call+0x1c0e/0x3000 arch/x86/include/generated/asm/syscalls_64.h:323 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888103852630 of 4 bytes by task 9825 on cpu 1: thread_group_leader include/linux/sched/signal.h:706 [inline] do_cgroup_task_dead kernel/cgroup/cgroup.c:7004 [inline] cgroup_task_dead+0x97/0x2b0 kernel/cgroup/cgroup.c:7065 finish_task_switch+0x1b7/0x2a0 kernel/sched/core.c:5152 context_switch kernel/sched/core.c:5259 [inline] __schedule+0x85f/0xcd0 kernel/sched/core.c:6863 preempt_schedule_common kernel/sched/core.c:7047 [inline] __cond_resched+0x31/0x60 kernel/sched/core.c:7376 might_resched include/linux/kernel.h:61 [inline] might_alloc include/linux/sched/mm.h:323 [inline] slab_pre_alloc_hook mm/slub.c:4904 [inline] slab_alloc_node mm/slub.c:5239 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_noprof+0xaf/0x5a0 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] lsm_blob_alloc security/security.c:192 [inline] lsm_bpf_map_alloc security/security.c:314 [inline] security_bpf_map_create+0x51/0x130 security/security.c:5225 map_create+0xcb5/0xda0 kernel/bpf/syscall.c:1594 __sys_bpf+0x54e/0x7c0 kernel/bpf/syscall.c:6146 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline] __se_sys_bpf kernel/bpf/syscall.c:6272 [inline] __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6272 x64_sys_call+0x28e1/0x3000 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000011 -> 0xffffffff Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 9825 Comm: syz.2.2166 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/01/09 01:31	upstream	79b95d74470d	d6526ea3	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in begin_new_exec / cgroup_task_dead

Crashes (1):

Assets (help?)