{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix link timeout refs\n\nWARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28\nRIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28\nCall Trace:\n __refcount_sub_and_test include/linux/refcount.h:283 [inline]\n __refcount_dec_and_test include/linux/refcount.h:315 [inline]\n refcount_dec_and_test include/linux/refcount.h:333 [inline]\n io_put_req fs/io_uring.c:2140 [inline]\n io_queue_linked_timeout fs/io_uring.c:6300 [inline]\n __io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354\n io_submit_sqe fs/io_uring.c:6534 [inline]\n io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660\n __do_sys_io_uring_enter fs/io_uring.c:9240 [inline]\n __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182\n\nio_link_timeout_fn() should put only one reference of the linked timeout\nrequest, however in case of racing with the master request's completion\nfirst io_req_complete() puts one and then io_put_req_deferred() is\ncalled."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/io_uring.c"
               ],
               "versions": [
                  {
                     "version": "1c20e9040f49",
                     "lessThan": "0b2a990e5d2f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1c20e9040f49",
                     "lessThan": "6f5d7a45f58d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "9ae1f8dd372e",
                     "lessThan": "876808dba2ff",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "9ae1f8dd372e",
                     "lessThan": "ff4a96ba5c8f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "9ae1f8dd372e",
                     "lessThan": "a298232ee6b9",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/io_uring.c"
               ],
               "versions": [
                  {
                     "version": "5.12",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.12",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.43",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.55",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.10",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.19",
                     "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/0b2a990e5d2f76d020cb840c456e6ec5f0c27530"
            },
            {
               "url": "https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff"
            },
            {
               "url": "https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410"
            },
            {
               "url": "https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86"
            },
            {
               "url": "https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82"
            }
         ],
         "title": "io_uring: fix link timeout refs",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47124",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}