{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails\n\narm_smmu_rpm_get() invokes pm_runtime_get_sync(), which increases the\nrefcount of the \"smmu\" even though the return value is less than 0.\n\nThe reference counting issue happens in some error handling paths of\narm_smmu_rpm_get() in its caller functions. When arm_smmu_rpm_get()\nfails, the caller functions forget to decrease the refcount of \"smmu\"\nincreased by arm_smmu_rpm_get(), causing a refcount leak.\n\nFix this issue by calling pm_runtime_resume_and_get() instead of\npm_runtime_get_sync() in arm_smmu_rpm_get(), which can keep the refcount\nbalanced in case of failure."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/iommu/arm/arm-smmu/arm-smmu.c"
               ],
               "versions": [
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "3761ae0d0e54",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "c4007596fbda",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "fbf4daa6f410",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "fe92c0581990",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "1adf30f198c2",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/iommu/arm/arm-smmu/arm-smmu.c"
               ],
               "versions": [
                  {
                     "version": "5.4.134",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.52",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.19",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.13.4",
                     "lessThanOrEqual": "5.13.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.14",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/3761ae0d0e549f2acdaf11f49df4ed06d256b20f"
            },
            {
               "url": "https://git.kernel.org/stable/c/c4007596fbdabc29f858dc2e1990858a146b60b2"
            },
            {
               "url": "https://git.kernel.org/stable/c/fbf4daa6f4105e01fbd3868006f65c163365c1e3"
            },
            {
               "url": "https://git.kernel.org/stable/c/fe92c058199067ae90cf2a901ddf3c271893557a"
            },
            {
               "url": "https://git.kernel.org/stable/c/1adf30f198c26539a62d761e45af72cde570413d"
            }
         ],
         "title": "iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47327",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}