cve-2024-42231
Vulnerability from cvelistv5
Published
2024-07-30 07:47
Modified
2024-11-05 09:38
Severity ?
Summary
btrfs: zoned: fix calc_available_free_space() for zoned mode
Impacted products
Vendor Product Version
Linux Linux Version: 6.7
Show details on NVD website


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                "id": "CVE-2024-42231",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
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    "cna": {
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          "product": "Linux",
          "programFiles": [
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          "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-\u003echunk_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."
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      "title": "btrfs: zoned: fix calc_available_free_space() for zoned mode",
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    "datePublished": "2024-07-30T07:47:11.409Z",
    "dateReserved": "2024-07-30T07:40:12.251Z",
    "dateUpdated": "2024-11-05T09:38:42.709Z",
    "state": "PUBLISHED"
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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 tama\u00f1o total de los grupos de bloques de metadatos (o sistema), que se pueden asignar desde espacio en disco no asignado. La l\u00f3gica es incorrecta en el modo por zonas en dos lugares. Primero, el c\u00e1lculo de data_chunk_size es incorrecto. Siempre asignamos una zona como un fragmento y no asignamos una zona parcial. 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}


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