{
   "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: rds: fix memory leak in rds_recvmsg\n\nSyzbot reported memory leak in rds. The problem\nwas in unputted refcount in case of error.\n\nint rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,\n\t\tint msg_flags)\n{\n...\n\n\tif (!rds_next_incoming(rs, &inc)) {\n\t\t...\n\t}\n\nAfter this \"if\" inc refcount incremented and\n\n\tif (rds_cmsg_recv(inc, msg, rs)) {\n\t\tret = -EFAULT;\n\t\tgoto out;\n\t}\n...\nout:\n\treturn ret;\n}\n\nin case of rds_cmsg_recv() fail the refcount won't be\ndecremented. And it's easy to see from ftrace log, that\nrds_inc_addref() don't have rds_inc_put() pair in\nrds_recvmsg() after rds_cmsg_recv()\n\n 1)               |  rds_recvmsg() {\n 1)   3.721 us    |    rds_inc_addref();\n 1)   3.853 us    |    rds_message_inc_copy_to_user();\n 1) + 10.395 us   |    rds_cmsg_recv();\n 1) + 34.260 us   |  }"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/rds/recv.c"
               ],
               "versions": [
                  {
                     "version": "bdbe6fbc6a2f",
                     "lessThan": "8c3ec88b03e9",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bdbe6fbc6a2f",
                     "lessThan": "423c6939758f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bdbe6fbc6a2f",
                     "lessThan": "1f79bc8ae81c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bdbe6fbc6a2f",
                     "lessThan": "06b7cb0194bd",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bdbe6fbc6a2f",
                     "lessThan": "2038cd15eacd",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bdbe6fbc6a2f",
                     "lessThan": "5946fbf48355",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bdbe6fbc6a2f",
                     "lessThan": "b25b60d07616",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bdbe6fbc6a2f",
                     "lessThan": "49bfcbfd989a",
                     "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/rds/recv.c"
               ],
               "versions": [
                  {
                     "version": "2.6.30",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.30",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.274",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.274",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.238",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.196",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.128",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.46",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.13",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.13",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/8c3ec88b03e9e4ca117dcdc4204fd3edcd02084f"
            },
            {
               "url": "https://git.kernel.org/stable/c/423c6939758fb3b9cf5abbd1e7792068a5c4ae8c"
            },
            {
               "url": "https://git.kernel.org/stable/c/1f79bc8ae81c05eb112a53f981cb2c244ee50d02"
            },
            {
               "url": "https://git.kernel.org/stable/c/06b7cb0194bd1ede0dd27f3a946e7c0279fba44a"
            },
            {
               "url": "https://git.kernel.org/stable/c/2038cd15eacdf7512755c27686822e0052eb9042"
            },
            {
               "url": "https://git.kernel.org/stable/c/5946fbf48355f5a8caeff72580c7658da5966b86"
            },
            {
               "url": "https://git.kernel.org/stable/c/b25b60d076164edb3025e85aabd2cf50a5215b91"
            },
            {
               "url": "https://git.kernel.org/stable/c/49bfcbfd989a8f1f23e705759a6bb099de2cff9f"
            }
         ],
         "title": "net: rds: fix memory leak in rds_recvmsg",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47249",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}