KCSAN: data-race in file_update_time_flags / inode_set_ctime_to

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
46cd81d4-bddd-44a7-8eff-bdfc49c1f87a	assessment-kcsan		💥	KCSAN: data-race in file_update_time_flags / inode_set_ctime_to_ts	2026/01/10 00:41	2026/01/10 00:41	2026/01/10 00:59	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" } } } }]]

netlink: 1004 bytes leftover after parsing attributes in process `syz.0.2800'. ================================================================== BUG: KCSAN: data-race in file_update_time_flags / inode_set_ctime_to_ts write to 0xffff8881004bb888 of 4 bytes by task 12023 on cpu 0: inode_set_ctime_to_ts+0x84/0x170 fs/inode.c:2745 inode_set_ctime_current+0x1cd/0x760 fs/inode.c:2808 inode_update_timestamps+0x84/0x270 fs/inode.c:2109 generic_update_time fs/inode.c:2148 [inline] inode_update_time fs/inode.c:2168 [inline] file_update_time_flags+0x26c/0x310 fs/inode.c:2395 file_update_time+0x17/0x20 fs/inode.c:2416 fault_dirty_shared_page+0xd9/0x390 mm/memory.c:3570 do_shared_fault mm/memory.c:5847 [inline] do_fault mm/memory.c:5893 [inline] do_pte_missing mm/memory.c:4401 [inline] handle_pte_fault mm/memory.c:6273 [inline] __handle_mm_fault mm/memory.c:6411 [inline] handle_mm_fault+0x1690/0x2c60 mm/memory.c:6580 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x1024/0x1ed0 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+0x27ef/0x3000 arch/x86/include/generated/asm/syscalls_64.h:312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd8/0x2a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881004bb888 of 4 bytes by task 12027 on cpu 1: inode_get_ctime_nsec include/linux/fs.h:1688 [inline] inode_get_ctime include/linux/fs.h:1694 [inline] file_update_time_flags+0x112/0x310 fs/inode.c:2381 file_update_time+0x17/0x20 fs/inode.c:2416 fault_dirty_shared_page+0xd9/0x390 mm/memory.c:3570 do_shared_fault mm/memory.c:5847 [inline] do_fault mm/memory.c:5893 [inline] do_pte_missing mm/memory.c:4401 [inline] handle_pte_fault mm/memory.c:6273 [inline] __handle_mm_fault mm/memory.c:6411 [inline] handle_mm_fault+0x1690/0x2c60 mm/memory.c:6580 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x1024/0x1ed0 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+0x1ee/0x1480 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+0x184/0x14c0 io_uring/rsrc.c:801 io_sqe_buffers_register+0x2b1/0x540 io_uring/rsrc.c:916 __io_uring_register io_uring/register.c:637 [inline] __do_sys_io_uring_register io_uring/register.c:919 [inline] __se_sys_io_uring_register+0x9ef/0xf20 io_uring/register.c:896 __x64_sys_io_uring_register+0x55/0x70 io_uring/register.c:896 x64_sys_call+0x27ad/0x3000 arch/x86/include/generated/asm/syscalls_64.h:428 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd8/0x2a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x354d3db4 -> 0x367e6ab4 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 12027 Comm: syz.0.2800 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
2025/12/07 20:07	upstream	37bb2e7217b0	d6526ea3	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in file_update_time_flags / inode_set_ctime_to_ts

Crashes (1):

Assets (help?)