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FKIE_CVE-2026-89753

Vulnerability from fkie_nvd - Published: 2026-09-11 20:20 - Updated: 2026-09-14 13:19
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/029c9408049f7f582230322057b7075bea594fd5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cdc1bdf40944de5c6b118fef07ad23f07844338
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/vmscan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57",
              "status": "affected",
              "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
              "versionType": "git"
            },
            {
              "lessThan": "4cdc1bdf40944de5c6b118fef07ad23f07844338",
              "status": "affected",
              "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
              "versionType": "git"
            },
            {
              "lessThan": "a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b",
              "status": "affected",
              "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
              "versionType": "git"
            },
            {
              "lessThan": "029c9408049f7f582230322057b7075bea594fd5",
              "status": "affected",
              "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
              "versionType": "git"
            },
            {
              "lessThan": "b5391676c61d94ffe3272dcf6723738b802f79e8",
              "status": "affected",
              "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
              "versionType": "git"
            },
            {
              "lessThan": "3fd50239986302cb050d3649351bcec00fa9d5ab",
              "status": "affected",
              "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
              "versionType": "git"
            },
            {
              "lessThan": "cf3ba0911a1cf8680371ff113b90088edd01d2bb",
              "status": "affected",
              "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
              "versionType": "git"
            },
            {
              "lessThan": "25f52e81216884a7444bf07a606691feb09a94e3",
              "status": "affected",
              "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/vmscan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.18"
            },
            {
              "lessThan": "3.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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]"
    }
  ],
  "id": "CVE-2026-89753",
  "lastModified": "2026-09-14T13:19:24.033",
  "metrics": {},
  "published": "2026-09-11T20:20:06.270",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/029c9408049f7f582230322057b7075bea594fd5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4cdc1bdf40944de5c6b118fef07ad23f07844338"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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