{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: batman-adv: fix error handling\n\nSyzbot reported ODEBUG warning in batadv_nc_mesh_free(). The problem was\nin wrong error handling in batadv_mesh_init().\n\nBefore this patch batadv_mesh_init() was calling batadv_mesh_free() in case\nof any batadv_*_init() calls failure. This approach may work well, when\nthere is some kind of indicator, which can tell which parts of batadv are\ninitialized; but there isn't any.\n\nAll written above lead to cleaning up uninitialized fields. Even if we hide\nODEBUG warning by initializing bat_priv->nc.work, syzbot was able to hit\nGPF in batadv_nc_purge_paths(), because hash pointer in still NULL. [1]\n\nTo fix these bugs we can unwind batadv_*_init() calls one by one.\nIt is good approach for 2 reasons: 1) It fixes bugs on error handling\npath 2) It improves the performance, since we won't call unneeded\nbatadv_*_free() functions.\n\nSo, this patch makes all batadv_*_init() clean up all allocated memory\nbefore returning with an error to no call correspoing batadv_*_free()\nand open-codes batadv_mesh_free() with proper order to avoid touching\nuninitialized fields."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/batman-adv/bridge_loop_avoidance.c",
                  "net/batman-adv/main.c",
                  "net/batman-adv/network-coding.c",
                  "net/batman-adv/translation-table.c"
               ],
               "versions": [
                  {
                     "version": "c6c8fea29769",
                     "lessThan": "0c6b199f09be",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c6c8fea29769",
                     "lessThan": "07533f1a673c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c6c8fea29769",
                     "lessThan": "e50f95765219",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c6c8fea29769",
                     "lessThan": "fbf150b16a36",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c6c8fea29769",
                     "lessThan": "6422e8471890",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c6c8fea29769",
                     "lessThan": "b0a2cd38553c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c6c8fea29769",
                     "lessThan": "a8f7359259dd",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c6c8fea29769",
                     "lessThan": "6f68cd634856",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/batman-adv/bridge_loop_avoidance.c",
                  "net/batman-adv/main.c",
                  "net/batman-adv/network-coding.c",
                  "net/batman-adv/translation-table.c"
               ],
               "versions": [
                  {
                     "version": "2.6.38",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.38",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.293",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.289",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.254",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.215",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.157",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.77",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.14.16",
                     "lessThanOrEqual": "5.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/0c6b199f09be489c48622537a550787fc80aea73"
            },
            {
               "url": "https://git.kernel.org/stable/c/07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20"
            },
            {
               "url": "https://git.kernel.org/stable/c/e50f957652190b5a88a8ebce7e5ab14ebd0d3f00"
            },
            {
               "url": "https://git.kernel.org/stable/c/fbf150b16a3635634b7dfb7f229d8fcd643c6c51"
            },
            {
               "url": "https://git.kernel.org/stable/c/6422e8471890273994fe8cc6d452b0dcd2c9483e"
            },
            {
               "url": "https://git.kernel.org/stable/c/b0a2cd38553c77928ef1646ed1518486b1e70ae8"
            },
            {
               "url": "https://git.kernel.org/stable/c/a8f7359259dd5923adc6129284fdad12fc5db347"
            },
            {
               "url": "https://git.kernel.org/stable/c/6f68cd634856f8ca93bafd623ba5357e0f648c68"
            }
         ],
         "title": "net: batman-adv: fix error handling",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47482",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}