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mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()

Type: advisorySource: Official CVE List1 source record

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]

Announced Source revision 1
Original source ↗

CVE-2026-89753

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89753

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
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Prerequisites
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Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
        "lessThan": "4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
        "lessThan": "4cdc1bdf40944de5c6b118fef07ad23f07844338",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
        "lessThan": "a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
        "lessThan": "029c9408049f7f582230322057b7075bea594fd5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
        "lessThan": "b5391676c61d94ffe3272dcf6723738b802f79e8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
        "lessThan": "3fd50239986302cb050d3649351bcec00fa9d5ab",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
        "lessThan": "cf3ba0911a1cf8680371ff113b90088edd01d2bb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8315f42295d2667a7f942f154b73a86fd7cb2227",
        "lessThan": "25f52e81216884a7444bf07a606691feb09a94e3",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "mm/vmscan.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.18"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.18",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "mm/vmscan.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89753

Source reference: /cveMetadata/cveId

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Event
#35227 · Revision 1
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