{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential bug in end_buffer_async_write\n\nAccording to a syzbot report, end_buffer_async_write(), which handles the\ncompletion of block device writes, may detect abnormal condition of the\nbuffer async_write flag and cause a BUG_ON failure when using nilfs2.\n\nNilfs2 itself does not use end_buffer_async_write().  But, the async_write\nflag is now used as a marker by commit 7f42ec394156 (\"nilfs2: fix issue\nwith race condition of competition between segments for dirty blocks\") as\na means of resolving double list insertion of dirty blocks in\nnilfs_lookup_dirty_data_buffers() and nilfs_lookup_node_buffers() and the\nresulting crash.\n\nThis modification is safe as long as it is used for file data and b-tree\nnode blocks where the page caches are independent.  However, it was\nirrelevant and redundant to also introduce async_write for segment summary\nand super root blocks that share buffers with the backing device.  This\nled to the possibility that the BUG_ON check in end_buffer_async_write\nwould fail as described above, if independent writebacks of the backing\ndevice occurred in parallel.\n\nThe use of async_write for segment summary buffers has already been\nremoved in a previous change.\n\nFix this issue by removing the manipulation of the async_write flag for\nthe remaining super root block buffer."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/nilfs2/segment.c"
               ],
               "versions": [
                  {
                     "version": "7f42ec394156",
                     "lessThan": "c4a09fdac625",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "7f42ec394156",
                     "lessThan": "d31c8721e816",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "7f42ec394156",
                     "lessThan": "f3e4963566f5",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "7f42ec394156",
                     "lessThan": "8fa90634ec3e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "7f42ec394156",
                     "lessThan": "6589f0f72f8e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "7f42ec394156",
                     "lessThan": "2c3bdba00283",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "7f42ec394156",
                     "lessThan": "626daab3811b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "7f42ec394156",
                     "lessThan": "5bc09b397cbf",
                     "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/nilfs2/segment.c"
               ],
               "versions": [
                  {
                     "version": "3.12",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "3.12",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.307",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.269",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.210",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.149",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.79",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.18",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.6",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/c4a09fdac625e64abe478dcf88bfa20406616928"
            },
            {
               "url": "https://git.kernel.org/stable/c/d31c8721e816eff5ca6573cc487754f357c093cd"
            },
            {
               "url": "https://git.kernel.org/stable/c/f3e4963566f58726d3265a727116a42b591f6596"
            },
            {
               "url": "https://git.kernel.org/stable/c/8fa90634ec3e9cc50f42dd605eec60f2d146ced8"
            },
            {
               "url": "https://git.kernel.org/stable/c/6589f0f72f8edd1fa11adce4eedbd3615f2e78ab"
            },
            {
               "url": "https://git.kernel.org/stable/c/2c3bdba00283a6c7a5b19481a59a730f46063803"
            },
            {
               "url": "https://git.kernel.org/stable/c/626daab3811b772086aef1bf8eed3ffe6f523eff"
            },
            {
               "url": "https://git.kernel.org/stable/c/5bc09b397cbf1221f8a8aacb1152650c9195b02b"
            }
         ],
         "title": "nilfs2: fix potential bug in end_buffer_async_write",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-26685",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}