CVE-2026-89753 (GCVE-0-2026-89753)
Vulnerability from cvelistv5
Published
2026-09-11 19:46
Modified
2026-10-19 08:52
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec() I am seeing some rcu_tasks stalls in the Meta fleet during reclaim. INFO: rcu_tasks detected stalls on tasks: 0000000088620d09: .. nvcsw: 6735/6735 holdout: 1 idle_cpu: -1/8 task:GlobalCPUThread state:R running task pid:2552016 tgid:2524552 Call Trace: shrink_lruvec mem_cgroup_iter shrink_node do_try_to_free_pages try_to_free_pages __alloc_frozen_pages_noprof alloc_pages_noprof pte_alloc_one __pte_alloc handle_mm_fault Nothing promises direct reclaim returns in bounded time, and the scan loop in shrink_lruvec() only calls cond_resched(), which is a no-op on PREEMPTION kernels. Involuntary preemption is not a Tasks-RCU quiescent state, so the reclaiming task never reports one and becomes a holdout. Upgrade it to cond_resched_tasks_rcu_qs(), which reports a quiescent state even when cond_resched() does nothing. PS: This has been discussed in [1]
References
Impacted products
Vendor Product Version
Linux Linux Version: 8315f42295d2667a7f942f154b73a86fd7cb2227
Version: 8315f42295d2667a7f942f154b73a86fd7cb2227
Version: 8315f42295d2667a7f942f154b73a86fd7cb2227
Version: 8315f42295d2667a7f942f154b73a86fd7cb2227
Version: 8315f42295d2667a7f942f154b73a86fd7cb2227
Version: 8315f42295d2667a7f942f154b73a86fd7cb2227
Version: 8315f42295d2667a7f942f154b73a86fd7cb2227
Version: 8315f42295d2667a7f942f154b73a86fd7cb2227
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{
  "containers": {
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          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()\n\nI am seeing some rcu_tasks stalls in the Meta fleet during reclaim.\n\n  INFO: rcu_tasks detected stalls on tasks:\n\t0000000088620d09: .. nvcsw: 6735/6735 holdout: 1 idle_cpu: -1/8\n\ttask:GlobalCPUThread state:R  running task  pid:2552016 tgid:2524552\n  Call Trace:\n   shrink_lruvec\n   mem_cgroup_iter\n   shrink_node\n   do_try_to_free_pages\n   try_to_free_pages\n   __alloc_frozen_pages_noprof\n   alloc_pages_noprof\n   pte_alloc_one\n   __pte_alloc\n   handle_mm_fault\n\nNothing promises direct reclaim returns in bounded time, and the scan loop\nin shrink_lruvec() only calls cond_resched(), which is a no-op on\nPREEMPTION kernels.  Involuntary preemption is not a Tasks-RCU quiescent\nstate, so the reclaiming task never reports one and becomes a holdout.\n\nUpgrade it to cond_resched_tasks_rcu_qs(), which reports a quiescent state\neven when cond_resched() does nothing.\n\nPS: This has been discussed in [1]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:52:06.974Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57"
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        {
          "url": "https://git.kernel.org/stable/c/4cdc1bdf40944de5c6b118fef07ad23f07844338"
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          "url": "https://git.kernel.org/stable/c/a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/029c9408049f7f582230322057b7075bea594fd5"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3"
        }
      ],
      "title": "mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89753",
    "datePublished": "2026-09-11T19:46:56.806Z",
    "dateReserved": "2026-09-11T19:38:34.763Z",
    "dateUpdated": "2026-10-19T08:52:06.974Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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