cve-2024-42231
Vulnerability from cvelistv5
Published
2024-07-30 07:47
Modified
2024-12-19 09:14
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix calc_available_free_space() for zoned mode calc_available_free_space() returns the total size of metadata (or system) block groups, which can be allocated from unallocated disk space. The logic is wrong on zoned mode in two places. First, the calculation of data_chunk_size is wrong. We always allocate one zone as one chunk, and no partial allocation of a zone. So, we should use zone_size (= data_sinfo->chunk_size) as it is. Second, the result "avail" may not be zone aligned. Since we always allocate one zone as one chunk on zoned mode, returning non-zone size aligned bytes will result in less pressure on the async metadata reclaim process. This is serious for the nearly full state with a large zone size device. Allowing over-commit too much will result in less async reclaim work and end up in ENOSPC. We can align down to the zone size to avoid that.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64d2c847ba380e07b9072d65a50aa6469d2aa43fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8548903b1999bba02a2b894ad750ab8eb1f40307Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/64d2c847ba380e07b9072d65a50aa6469d2aa43fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8548903b1999bba02a2b894ad750ab8eb1f40307Patch
Impacted products
Vendor Product Version
Linux Linux Version: cb6cbab79055ca207ad88bc54226b48ececdcef0
Version: cb6cbab79055ca207ad88bc54226b48ececdcef0
 Create a notification for this product.
   Linux Linux Version: 6.7
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
   containers: {
      adp: [
         {
            providerMetadata: {
               dateUpdated: "2024-08-02T04:54:32.610Z",
               orgId: "af854a3a-2127-422b-91ae-364da2661108",
               shortName: "CVE",
            },
            references: [
               {
                  tags: [
                     "x_transferred",
                  ],
                  url: "https://git.kernel.org/stable/c/8548903b1999bba02a2b894ad750ab8eb1f40307",
               },
               {
                  tags: [
                     "x_transferred",
                  ],
                  url: "https://git.kernel.org/stable/c/64d2c847ba380e07b9072d65a50aa6469d2aa43f",
               },
            ],
            title: "CVE Program Container",
         },
         {
            metrics: [
               {
                  other: {
                     content: {
                        id: "CVE-2024-42231",
                        options: [
                           {
                              Exploitation: "none",
                           },
                           {
                              Automatable: "no",
                           },
                           {
                              "Technical Impact": "partial",
                           },
                        ],
                        role: "CISA Coordinator",
                        timestamp: "2024-09-10T16:14:20.817500Z",
                        version: "2.0.3",
                     },
                     type: "ssvc",
                  },
               },
            ],
            providerMetadata: {
               dateUpdated: "2024-09-11T17:34:32.740Z",
               orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
               shortName: "CISA-ADP",
            },
            title: "CISA ADP Vulnrichment",
         },
      ],
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "fs/btrfs/space-info.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     lessThan: "8548903b1999bba02a2b894ad750ab8eb1f40307",
                     status: "affected",
                     version: "cb6cbab79055ca207ad88bc54226b48ececdcef0",
                     versionType: "git",
                  },
                  {
                     lessThan: "64d2c847ba380e07b9072d65a50aa6469d2aa43f",
                     status: "affected",
                     version: "cb6cbab79055ca207ad88bc54226b48ececdcef0",
                     versionType: "git",
                  },
               ],
            },
            {
               defaultStatus: "affected",
               product: "Linux",
               programFiles: [
                  "fs/btrfs/space-info.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     status: "affected",
                     version: "6.7",
                  },
                  {
                     lessThan: "6.7",
                     status: "unaffected",
                     version: "0",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.9.*",
                     status: "unaffected",
                     version: "6.9.9",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "*",
                     status: "unaffected",
                     version: "6.10",
                     versionType: "original_commit_for_fix",
                  },
               ],
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: fix calc_available_free_space() for zoned mode\n\ncalc_available_free_space() returns the total size of metadata (or\nsystem) block groups, which can be allocated from unallocated disk\nspace. The logic is wrong on zoned mode in two places.\n\nFirst, the calculation of data_chunk_size is wrong. We always allocate\none zone as one chunk, and no partial allocation of a zone. So, we\nshould use zone_size (= data_sinfo->chunk_size) as it is.\n\nSecond, the result \"avail\" may not be zone aligned. Since we always\nallocate one zone as one chunk on zoned mode, returning non-zone size\naligned bytes will result in less pressure on the async metadata reclaim\nprocess.\n\nThis is serious for the nearly full state with a large zone size device.\nAllowing over-commit too much will result in less async reclaim work and\nend up in ENOSPC. We can align down to the zone size to avoid that.",
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-12-19T09:14:29.486Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
         references: [
            {
               url: "https://git.kernel.org/stable/c/8548903b1999bba02a2b894ad750ab8eb1f40307",
            },
            {
               url: "https://git.kernel.org/stable/c/64d2c847ba380e07b9072d65a50aa6469d2aa43f",
            },
         ],
         title: "btrfs: zoned: fix calc_available_free_space() for zoned mode",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2024-42231",
      datePublished: "2024-07-30T07:47:11.409Z",
      dateReserved: "2024-07-30T07:40:12.251Z",
      dateUpdated: "2024-12-19T09:14:29.486Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2024-42231\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-30T08:15:08.307\",\"lastModified\":\"2024-11-21T09:33:46.177\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: zoned: fix calc_available_free_space() for zoned mode\\n\\ncalc_available_free_space() returns the total size of metadata (or\\nsystem) block groups, which can be allocated from unallocated disk\\nspace. The logic is wrong on zoned mode in two places.\\n\\nFirst, the calculation of data_chunk_size is wrong. We always allocate\\none zone as one chunk, and no partial allocation of a zone. So, we\\nshould use zone_size (= data_sinfo->chunk_size) as it is.\\n\\nSecond, the result \\\"avail\\\" may not be zone aligned. Since we always\\nallocate one zone as one chunk on zoned mode, returning non-zone size\\naligned bytes will result in less pressure on the async metadata reclaim\\nprocess.\\n\\nThis is serious for the nearly full state with a large zone size device.\\nAllowing over-commit too much will result in less async reclaim work and\\nend up in ENOSPC. We can align down to the zone size to avoid that.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs:zoned: fix calc_available_free_space() para el modo zonal calc_available_free_space() devuelve el tamaño total de los grupos de bloques de metadatos (o sistema), que se pueden asignar desde espacio en disco no asignado. La lógica es incorrecta en el modo por zonas en dos lugares. Primero, el cálculo de data_chunk_size es incorrecto. Siempre asignamos una zona como un fragmento y no asignamos una zona parcial. Entonces, deberíamos usar Zone_size (= data_sinfo->chunk_size) tal como está. En segundo lugar, es posible que el resultado \\\"avail\\\" no esté alineado con la zona. Dado que siempre asignamos una zona como un fragmento en el modo de zona, devolver bytes alineados sin tamaño de zona generará menos presión sobre el proceso de recuperación de metadatos asíncronos. Esto es grave para el estado casi lleno con un dispositivo de gran tamaño de zona. Permitir un compromiso excesivo dará como resultado menos trabajo de recuperación asíncrona y terminará en ENOSPC. Podemos alinearnos con el tamaño de la zona para evitar eso.\"}],\"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\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-682\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.9.9\",\"matchCriteriaId\":\"ADCC1407-0CB3-4C8F-B4C5-07F682CD7085\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"2EBB4392-5FA6-4DA9-9772-8F9C750109FA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"331C2F14-12C7-45D5-893D-8C52EE38EA10\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3173713D-909A-4DD3-9DD4-1E171EB057EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"79F18AFA-40F7-43F0-BA30-7BDB65F918B9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"BD973AA4-A789-49BD-8D57-B2846935D3C7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"8F3E9E0C-AC3E-4967-AF80-6483E8AB0078\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/64d2c847ba380e07b9072d65a50aa6469d2aa43f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8548903b1999bba02a2b894ad750ab8eb1f40307\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/64d2c847ba380e07b9072d65a50aa6469d2aa43f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8548903b1999bba02a2b894ad750ab8eb1f40307\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/8548903b1999bba02a2b894ad750ab8eb1f40307\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/64d2c847ba380e07b9072d65a50aa6469d2aa43f\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:54:32.610Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-42231\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:14:20.817500Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:24.340Z\"}}], \"cna\": {\"title\": \"btrfs: zoned: fix calc_available_free_space() for zoned mode\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"cb6cbab79055\", \"lessThan\": \"8548903b1999\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cb6cbab79055\", \"lessThan\": \"64d2c847ba38\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/btrfs/space-info.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.9.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/btrfs/space-info.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/8548903b1999bba02a2b894ad750ab8eb1f40307\"}, {\"url\": \"https://git.kernel.org/stable/c/64d2c847ba380e07b9072d65a50aa6469d2aa43f\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: zoned: fix calc_available_free_space() for zoned mode\\n\\ncalc_available_free_space() returns the total size of metadata (or\\nsystem) block groups, which can be allocated from unallocated disk\\nspace. The logic is wrong on zoned mode in two places.\\n\\nFirst, the calculation of data_chunk_size is wrong. We always allocate\\none zone as one chunk, and no partial allocation of a zone. So, we\\nshould use zone_size (= data_sinfo->chunk_size) as it is.\\n\\nSecond, the result \\\"avail\\\" may not be zone aligned. Since we always\\nallocate one zone as one chunk on zoned mode, returning non-zone size\\naligned bytes will result in less pressure on the async metadata reclaim\\nprocess.\\n\\nThis is serious for the nearly full state with a large zone size device.\\nAllowing over-commit too much will result in less async reclaim work and\\nend up in ENOSPC. We can align down to the zone size to avoid that.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:38:42.709Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2024-42231\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:38:42.709Z\", \"dateReserved\": \"2024-07-30T07:40:12.251Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-30T07:47:11.409Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.