ext4: fix race condition between ext4_write and ext4_convert_inline_data

{
  "id": "a0ad3babdfebbb7d29b09d79c9cf179a727cc1c32dd918e90b1d3277c5d487c0",
  "url": "https://osv.dev/vulnerability/CVE-2022-49414",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ext4: fix race condition between ext4_write and ext4_convert_inline_data",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ext4: fix race condition between ext4_write and ext4_convert_inline_data Hulk Robot reported a BUG_ON: ================================================================== EXT4-fs error (device loop3): ext4_mb_generate_buddy:805: group 0, block bitmap and bg descriptor inconsistent: 25 vs 31513 free clusters kernel BUG at fs/ext4/ext4_jbd2.c:53! invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 PID: 25371 Comm: syz-executor.3 Not tainted 5.10.0+ #1 RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline] RIP: 0010:__ext4_journal_stop+0x10e/0x110 fs/ext4/ext4_jbd2.c:116 [...] Call Trace: ext4_write_inline_data_end+0x59a/0x730 fs/ext4/inline.c:795 generic_perform_write+0x279/0x3c0 mm/filemap.c:3344 ext4_buffered_write_iter+0x2e3/0x3d0 fs/ext4/file.c:270 ext4_file_write_iter+0x30a/0x11c0 fs/ext4/file.c:520 do_iter_readv_writev+0x339/0x3c0 fs/read_write.c:732 do_iter_write+0x107/0x430 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_pwritev+0x1e5/0x380 fs/read_write.c:1031 [...] ================================================================== Above issue may happen as follows: cpu1 cpu2 __________________________|__________________________ do_pwritev vfs_writev do_iter_write ext4_file_write_iter ext4_buffered_write_iter generic_perform_write ext4_da_write_begin vfs_fallocate ext4_fallocate ext4_convert_inline_data ext4_convert_inline_data_nolock ext4_destroy_inline_data_nolock clear EXT4_STATE_MAY_",
    "evidence": "osv:CVE-2022-49414",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.207",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.132",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.46",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.17.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.18.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2022-49414",
      "aliases": [
        "CVE-2022-49414"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "18881d7e517169193d9ef6c89c7f322e3e164277"
                },
                {
                  "fixed": "91f90b571f1a23f5b8a9c2b68a9aa5d6981a3c3d"
                },
                {
                  "fixed": "14602353b350950b551eccc6b46411aa3b12ffe2"
                },
                {
                  "fixed": "725e00cb7039eae291890f1bb19bc867176745f6"
                },
                {
                  "fixed": "ccc6639f831bee91aa8b41c8a1cdd020ecfb9f32"
                },
                {
                  "fixed": "f87c7a4b084afc13190cbb263538e444cb2b392a"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49414.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.8.0"
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                {
                  "fixed": "5.4.207"
                }
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            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
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                {
                  "fixed": "5.10.132"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.46"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
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                  "fixed": "5.17.14"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.18.0"
                },
                {
                  "fixed": "5.18.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49414.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.266126168Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/14602353b350950b551eccc6b46411aa3b12ffe2",
        "https://git.kernel.org/stable/c/18881d7e517169193d9ef6c89c7f322e3e164277",
        "https://git.kernel.org/stable/c/725e00cb7039eae291890f1bb19bc867176745f6",
        "https://git.kernel.org/stable/c/91f90b571f1a23f5b8a9c2b68a9aa5d6981a3c3d",
        "https://git.kernel.org/stable/c/ccc6639f831bee91aa8b41c8a1cdd020ecfb9f32",
        "https://git.kernel.org/stable/c/f87c7a4b084afc13190cbb263538e444cb2b392a",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49414.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49414",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49414.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49414",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509741,
  "published_at": "2025-02-26T02:12:35.083+00:00"
}