CVE-2023-54117 (GCVE-0-2023-54117)
Vulnerability from cvelistv5
Published
2025-12-24 13:06
Modified
2025-12-24 13:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/dcssblk: fix kernel crash with list_add corruption Commit fb08a1908cb1 ("dax: simplify the dax_device <-> gendisk association") introduced new logic for gendisk association, requiring drivers to explicitly call dax_add_host() and dax_remove_host(). For dcssblk driver, some dax_remove_host() calls were missing, e.g. in device remove path. The commit also broke error handling for out_dax case in device add path, resulting in an extra put_device() w/o the previous get_device() in that case. This lead to stale xarray entries after device add / remove cycles. In the case when a previously used struct gendisk pointer (xarray index) would be used again, because blk_alloc_disk() happened to return such a pointer, the xa_insert() in dax_add_host() would fail and go to out_dax, doing the extra put_device() in the error path. In combination with an already flawed error handling in dcssblk (device_register() cleanup), which needs to be addressed in a separate patch, this resulted in a missing device_del() / klist_del(), and eventually in the kernel crash with list_add corruption on a subsequent device_add() / klist_add(). Fix this by adding the missing dax_remove_host() calls, and also move the put_device() in the error path to restore the previous logic.
References
Impacted products
Vendor Product Version
Linux Linux Version: fb08a1908cb119a4585611d91461ab6d27756b14
Version: fb08a1908cb119a4585611d91461ab6d27756b14
Version: fb08a1908cb119a4585611d91461ab6d27756b14
Version: fb08a1908cb119a4585611d91461ab6d27756b14
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/block/dcssblk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "5.17"
            },
            {
              "lessThan": "5.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.53",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.16",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.5.3",
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                },
                {
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                  "versionEndExcluding": "6.6",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dcssblk: fix kernel crash with list_add corruption\n\nCommit fb08a1908cb1 (\"dax: simplify the dax_device \u003c-\u003e gendisk\nassociation\") introduced new logic for gendisk association, requiring\ndrivers to explicitly call dax_add_host() and dax_remove_host().\n\nFor dcssblk driver, some dax_remove_host() calls were missing, e.g. in\ndevice remove path. The commit also broke error handling for out_dax case\nin device add path, resulting in an extra put_device() w/o the previous\nget_device() in that case.\n\nThis lead to stale xarray entries after device add / remove cycles. In the\ncase when a previously used struct gendisk pointer (xarray index) would be\nused again, because blk_alloc_disk() happened to return such a pointer, the\nxa_insert() in dax_add_host() would fail and go to out_dax, doing the extra\nput_device() in the error path. In combination with an already flawed error\nhandling in dcssblk (device_register() cleanup), which needs to be\naddressed in a separate patch, this resulted in a missing device_del() /\nklist_del(), and eventually in the kernel crash with list_add corruption on\na subsequent device_add() / klist_add().\n\nFix this by adding the missing dax_remove_host() calls, and also move the\nput_device() in the error path to restore the previous logic."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T13:06:38.311Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6489ec0107860345bc57dcde39e63dfb05ac5c11"
        },
        {
          "url": "https://git.kernel.org/stable/c/b7ad75c77349beb4983b9f27108d9b3f33ae1413"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5c531a9a7d8e047c90c909f09cef06a9f8e62f4"
        },
        {
          "url": "https://git.kernel.org/stable/c/c8f40a0bccefd613748d080147469a4652d6e74c"
        }
      ],
      "title": "s390/dcssblk: fix kernel crash with list_add corruption",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54117",
    "datePublished": "2025-12-24T13:06:38.311Z",
    "dateReserved": "2025-12-24T13:02:52.520Z",
    "dateUpdated": "2025-12-24T13:06:38.311Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54117\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T13:16:13.637\",\"lastModified\":\"2025-12-24T13:16:13.637\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ns390/dcssblk: fix kernel crash with list_add corruption\\n\\nCommit fb08a1908cb1 (\\\"dax: simplify the dax_device \u003c-\u003e gendisk\\nassociation\\\") introduced new logic for gendisk association, requiring\\ndrivers to explicitly call dax_add_host() and dax_remove_host().\\n\\nFor dcssblk driver, some dax_remove_host() calls were missing, e.g. in\\ndevice remove path. The commit also broke error handling for out_dax case\\nin device add path, resulting in an extra put_device() w/o the previous\\nget_device() in that case.\\n\\nThis lead to stale xarray entries after device add / remove cycles. In the\\ncase when a previously used struct gendisk pointer (xarray index) would be\\nused again, because blk_alloc_disk() happened to return such a pointer, the\\nxa_insert() in dax_add_host() would fail and go to out_dax, doing the extra\\nput_device() in the error path. In combination with an already flawed error\\nhandling in dcssblk (device_register() cleanup), which needs to be\\naddressed in a separate patch, this resulted in a missing device_del() /\\nklist_del(), and eventually in the kernel crash with list_add corruption on\\na subsequent device_add() / klist_add().\\n\\nFix this by adding the missing dax_remove_host() calls, and also move the\\nput_device() in the error path to restore the previous logic.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6489ec0107860345bc57dcde39e63dfb05ac5c11\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b5c531a9a7d8e047c90c909f09cef06a9f8e62f4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7ad75c77349beb4983b9f27108d9b3f33ae1413\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c8f40a0bccefd613748d080147469a4652d6e74c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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