syzbot

unknown

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. 
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unknown

map[KernelSrc:/usr/local/google/home/dvyukov/syzkaller/agent/workdir/cache/src/761c89d80a8577d5dba2a721de12cc04cb43ff14]

unknown

map[KernelObj:/usr/local/google/home/dvyukov/syzkaller/agent/workdir/cache/build/9dce9dd65e825296b412dc760805ab08dc7d0dbc]

unknown

map[Index:codesearch-index]

unknown

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. 
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You are an experienced Linux kernel developer tasked with determining if the given kernel
data race is benign or not. The data race report is from KCSAN tool.
It contains 2 stack traces of the memory accesses that constitute a data race.

The report would be non-actionable, if the underlysing data race is "benign".
That is, the race is on a simple int/bool or similar field, and the accesses
are not supposed to be protected by any mutual exclusion primitives.
Common examples of such "benign" data races are accesses to various flags fields,
statistics counters, and similar.
An actionable race is "harmful", that is can lead to corruption/crash even with
a conservative compiler that compiles memory accesses to primitive types
effectively as atomic. A common example of a "harmful" data races is race on
a complex container (list/hashmap/etc), where accesses are supposed to be protected
by a mutual exclusion primitive.
In the final reply explain why you think the report is consistent and the data race is harmful.

Use the provided tools to confirm any assumptions, what variables/fields being accessed, etc.
In particular, don't make assumptions about the kernel source code,
use codesearch tools to read the actual source code.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

The data race report is:

==================================================================
BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64

read-write to 0xffffffff86809a00 of 8 bytes by interrupt on cpu 1:
 tick_do_update_jiffies64+0x113/0x1c0 kernel/time/tick-sched.c:118
 tick_sched_do_timer kernel/time/tick-sched.c:253 [inline]
 tick_nohz_handler+0x8d/0x3d0 kernel/time/tick-sched.c:312
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x20f/0x5a0 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
 __sysvec_apic_timer_interrupt+0x5f/0x1d0 arch/x86/kernel/apic/apic.c:1062
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1056
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x3c/0x60 kernel/locking/spinlock.c:194
 unlock_hrtimer_base kernel/time/hrtimer.c:1013 [inline]
 hrtimer_start_range_ns+0x6e2/0x740 kernel/time/hrtimer.c:1325
 hrtimer_start_expires include/linux/hrtimer.h:273 [inline]
 hrtimer_sleeper_start_expires kernel/time/hrtimer.c:2039 [inline]
 do_nanosleep+0x79/0x330 kernel/time/hrtimer.c:2113
 hrtimer_nanosleep+0x1b8/0x360 kernel/time/hrtimer.c:2163
 common_nsleep+0x62/0x80 kernel/time/posix-timers.c:1352
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1398 [inline]
 __se_sys_clock_nanosleep+0x21a/0x250 kernel/time/posix-timers.c:1375
 __x64_sys_clock_nanosleep+0x55/0x70 kernel/time/posix-timers.c:1375
 x64_sys_call+0x2734/0x3000 arch/x86/include/generated/asm/syscalls_64.h:231
 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 0xffffffff86809a00 of 8 bytes by task 6439 on cpu 0:
 mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:636
 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678
 do_shrink_slab+0x63/0x680 mm/shrinker.c:384
 shrink_slab_memcg mm/shrinker.c:550 [inline]
 shrink_slab+0x4f5/0x840 mm/shrinker.c:628
 shrink_node_memcgs mm/vmscan.c:6022 [inline]
 shrink_node+0x6a9/0x2010 mm/vmscan.c:6061
 shrink_zones mm/vmscan.c:6300 [inline]
 do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6362
 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6690
 try_charge_memcg+0x383/0xa10 mm/memcontrol.c:2388
 obj_cgroup_charge_pages+0xa6/0x150 mm/memcontrol.c:2823
 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2867
 __alloc_frozen_pages_noprof+0x18f/0x360 mm/page_alloc.c:5227
 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2486
 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline]
 alloc_pages_noprof+0x90/0x130 mm/mempolicy.c:2577
 vm_area_alloc_pages mm/vmalloc.c:3718 [inline]
 __vmalloc_area_node mm/vmalloc.c:3863 [inline]
 __vmalloc_node_range_noprof+0xa7b/0x1310 mm/vmalloc.c:4051
 __kvmalloc_node_noprof+0x492/0x6b0 mm/slub.c:7164
 ip_set_alloc+0x24/0x30 net/netfilter/ipset/ip_set_core.c:261
 hash_netiface_create+0x282/0x740 net/netfilter/ipset/ip_set_hash_gen.h:1568
 ip_set_create+0x3cc/0x970 net/netfilter/ipset/ip_set_core.c:1109
 nfnetlink_rcv_msg+0x4c6/0x590 net/netfilter/nfnetlink.c:302
 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2550
 nfnetlink_rcv+0x167/0x16c0 net/netfilter/nfnetlink.c:669
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5c0/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x145/0x180 net/socket.c:742
 ____sys_sendmsg+0x31e/0x4a0 net/socket.c:2592
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2646
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2683 [inline]
 __se_sys_sendmsg net/socket.c:2681 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2681
 x64_sys_call+0x17ba/0x3000 arch/x86/include/generated/asm/syscalls_64.h:47
 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: 0x00000000ffffba27 -> 0x00000000ffffba28

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 6439 Comm: syz.1.929 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
==================================================================

unknown

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" } } } }]]