KCSAN: data-race in file_update_time / inode_set_ctime_to

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
fa5e972f-c896-4b36-9612-f81d51a2c324	assessment-kcsan		💥	KCSAN: data-race in file_update_time / inode_set_ctime_to_ts (2)	2026/01/10 07:26	2026/01/10 07:26	2026/01/10 07:26	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" } } } }]]

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in file_update_time / inode_set_ctime_to_ts fs	6				1	447d	447d	0/29	auto-obsoleted due to no activity on 2025/02/06 04:45

Kernel

Title

Rank 🛈

upstream

KCSAN: data-race in file_update_time / inode_set_ctime_to_ts fs

447d

0/29

auto-obsoleted due to no activity on 2025/02/06 04:45

================================================================== BUG: KCSAN: data-race in file_update_time / inode_set_ctime_to_ts write to 0xffff8881004bb888 of 4 bytes by task 21509 on cpu 1: inode_set_ctime_to_ts+0x84/0x170 fs/inode.c:2727 inode_set_ctime_current+0x1d6/0x770 fs/inode.c:2790 inode_update_timestamps+0x84/0x270 fs/inode.c:2071 generic_update_time fs/inode.c:2110 [inline] inode_update_time fs/inode.c:2130 [inline] __file_update_time fs/inode.c:2357 [inline] file_update_time+0x20e/0x2b0 fs/inode.c:2387 fault_dirty_shared_page+0xd9/0x3c0 mm/memory.c:3531 do_shared_fault mm/memory.c:5808 [inline] do_fault mm/memory.c:5854 [inline] do_pte_missing mm/memory.c:4362 [inline] handle_pte_fault mm/memory.c:6195 [inline] __handle_mm_fault mm/memory.c:6336 [inline] handle_mm_fault+0x165d/0x2be0 mm/memory.c:6505 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x102a/0x1ed0 mm/gup.c:1428 __get_user_pages_locked mm/gup.c:1692 [inline] __gup_longterm_locked+0x8ef/0xe60 mm/gup.c:2476 pin_user_pages_remote+0x7e/0xb0 mm/gup.c:3363 process_vm_rw_single_vec mm/process_vm_access.c:106 [inline] process_vm_rw_core mm/process_vm_access.c:216 [inline] process_vm_rw+0x484/0x960 mm/process_vm_access.c:284 __do_sys_process_vm_writev mm/process_vm_access.c:304 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:299 [inline] __x64_sys_process_vm_writev+0x78/0x90 mm/process_vm_access.c:299 x64_sys_call+0x2a80/0x3000 arch/x86/include/generated/asm/syscalls_64.h:312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881004bb888 of 4 bytes by task 21512 on cpu 0: inode_get_ctime_nsec include/linux/fs.h:1869 [inline] inode_get_ctime include/linux/fs.h:1875 [inline] inode_needs_update_time fs/inode.c:2340 [inline] file_update_time+0xec/0x2b0 fs/inode.c:2383 fault_dirty_shared_page+0xd9/0x3c0 mm/memory.c:3531 do_shared_fault mm/memory.c:5808 [inline] do_fault mm/memory.c:5854 [inline] do_pte_missing mm/memory.c:4362 [inline] handle_pte_fault mm/memory.c:6195 [inline] __handle_mm_fault mm/memory.c:6336 [inline] handle_mm_fault+0x165d/0x2be0 mm/memory.c:6505 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x102a/0x1ed0 mm/gup.c:1428 __get_user_pages_locked mm/gup.c:1692 [inline] __gup_longterm_locked+0x2fb/0xe60 mm/gup.c:2481 gup_fast_fallback+0x1f5/0x1420 mm/gup.c:3220 pin_user_pages_fast+0x5f/0x90 mm/gup.c:3326 io_pin_pages+0xba/0x170 io_uring/memmap.c:63 io_sqe_buffer_register+0x184/0x1430 io_uring/rsrc.c:799 io_sqe_buffers_register+0x2b1/0x540 io_uring/rsrc.c:914 __io_uring_register io_uring/register.c:649 [inline] __do_sys_io_uring_register io_uring/register.c:928 [inline] __se_sys_io_uring_register+0x90e/0xf00 io_uring/register.c:905 __x64_sys_io_uring_register+0x55/0x70 io_uring/register.c:905 x64_sys_call+0x18a3/0x3000 arch/x86/include/generated/asm/syscalls_64.h:428 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x030ea2e0 -> 0x03a73962 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 21512 Comm: syz.1.10896 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ==================================================================

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/11/25 08:53	upstream	ac3fd01e4c1e	64219f15	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in file_update_time / inode_set_ctime_to_ts
2025/11/20 19:08	upstream	8e621c9a3375	2cc4c24a	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in file_update_time / inode_set_ctime_to_ts

Crashes (2):

Assets (help?)