cve-2024-42316
Vulnerability from cvelistv5
Published
2024-08-17 09:09
Modified
2024-12-19 09:16
Severity ?
Summary
mm/mglru: fix div-by-zero in vmpressure_calc_level()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b671fe1a879923ecfb72dda6caf01460dd885efPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8de7bf77f21068a5f602bb1e59adbc5ab533509dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a39e38be632f0e1c908d70d1c9cd071c03faf895Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d6510f234c7d117790397f9bb150816b0a954a04Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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            "other": {
              "content": {
                "id": "CVE-2024-42316",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:09:42.817559Z",
                "version": "2.0.3"
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          "dateUpdated": "2024-09-12T17:33:26.476Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/vmscan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mglru: fix div-by-zero in vmpressure_calc_level()\n\nevict_folios() uses a second pass to reclaim folios that have gone through\npage writeback and become clean before it finishes the first pass, since\nfolio_rotate_reclaimable() cannot handle those folios due to the\nisolation.\n\nThe second pass tries to avoid potential double counting by deducting\nscan_control-\u003enr_scanned.  However, this can result in underflow of\nnr_scanned, under a condition where shrink_folio_list() does not increment\nnr_scanned, i.e., when folio_trylock() fails.\n\nThe underflow can cause the divisor, i.e., scale=scanned+reclaimed in\nvmpressure_calc_level(), to become zero, resulting in the following crash:\n\n  [exception RIP: vmpressure_work_fn+101]\n  process_one_work at ffffffffa3313f2b\n\nSince scan_control-\u003enr_scanned has no established semantics, the potential\ndouble counting has minimal risks.  Therefore, fix the problem by not\ndeducting scan_control-\u003enr_scanned in evict_folios()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:16:15.409Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/8de7bf77f21068a5f602bb1e59adbc5ab533509d"
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          "url": "https://git.kernel.org/stable/c/d6510f234c7d117790397f9bb150816b0a954a04"
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          "url": "https://git.kernel.org/stable/c/8b671fe1a879923ecfb72dda6caf01460dd885ef"
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      "title": "mm/mglru: fix div-by-zero in vmpressure_calc_level()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-42316",
    "datePublished": "2024-08-17T09:09:24.694Z",
    "dateReserved": "2024-07-30T07:40:12.278Z",
    "dateUpdated": "2024-12-19T09:16:15.409Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-42316\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-17T09:15:11.547\",\"lastModified\":\"2024-08-22T15:52:38.520\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/mglru: fix div-by-zero in vmpressure_calc_level()\\n\\nevict_folios() uses a second pass to reclaim folios that have gone through\\npage writeback and become clean before it finishes the first pass, since\\nfolio_rotate_reclaimable() cannot handle those folios due to the\\nisolation.\\n\\nThe second pass tries to avoid potential double counting by deducting\\nscan_control-\u003enr_scanned.  However, this can result in underflow of\\nnr_scanned, under a condition where shrink_folio_list() does not increment\\nnr_scanned, i.e., when folio_trylock() fails.\\n\\nThe underflow can cause the divisor, i.e., scale=scanned+reclaimed in\\nvmpressure_calc_level(), to become zero, resulting in the following crash:\\n\\n  [exception RIP: vmpressure_work_fn+101]\\n  process_one_work at ffffffffa3313f2b\\n\\nSince scan_control-\u003enr_scanned has no established semantics, the potential\\ndouble counting has minimal risks.  Therefore, fix the problem by not\\ndeducting scan_control-\u003enr_scanned in evict_folios().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/mglru: corrige div-by-zero en vmpression_calc_level() evict_folios() utiliza una segunda pasada para recuperar las publicaciones que han pasado por la reescritura de p\u00e1ginas y quedan limpias antes de finalizar el primer pase, ya que folio_rotate_reclaimable() no puede manejar esos folios debido al aislamiento. El segundo paso intenta evitar un posible doble conteo deduciendo scan_control-\u0026gt;nr_scanned. Sin embargo, esto puede resultar en un desbordamiento insuficiente de nr_scanned, bajo una condici\u00f3n en la que Shrink_folio_list() no incrementa nr_scanned, es decir, cuando falla folio_trylock(). El desbordamiento insuficiente puede causar que el divisor, es decir, escala=escaneado+reclamado en vmpression_calc_level(), se convierta en cero, lo que resulta en el siguiente bloqueo: [excepci\u00f3n RIP: vmpression_work_fn+101] Process_one_work en ffffffffa3313f2b Dado que scan_control-\u0026gt;nr_scanned no tiene una sem\u00e1ntica establecida, la posible doble contabilizaci\u00f3n tiene riesgos m\u00ednimos. Por lo tanto, solucione el problema no deduciendo scan_control-\u0026gt;nr_scanned en evict_folios().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-369\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1\",\"versionEndExcluding\":\"6.1.103\",\"matchCriteriaId\":\"81F7EA03-5805-43D2-9A78-820250B70B32\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.44\",\"matchCriteriaId\":\"CC912330-6B41-4C6B-99AF-F3857FBACB6A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.3\",\"matchCriteriaId\":\"92D388F2-1EAF-4CFA-AC06-5B26D762EA7D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/8b671fe1a879923ecfb72dda6caf01460dd885ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8de7bf77f21068a5f602bb1e59adbc5ab533509d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a39e38be632f0e1c908d70d1c9cd071c03faf895\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d6510f234c7d117790397f9bb150816b0a954a04\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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