cvelist/2024/40xxx/CVE-2024-40943.json

{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-40943",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix races between hole punching and AIO+DIO\n\nAfter commit \"ocfs2: return real error code in ocfs2_dio_wr_get_block\",\nfstests/generic/300 become from always failed to sometimes failed:\n\n========================================================================\n[  473.293420 ] run fstests generic/300\n\n[  475.296983 ] JBD2: Ignoring recovery information on journal\n[  475.302473 ] ocfs2: Mounting device (253,1) on (node local, slot 0) with ordered data mode.\n[  494.290998 ] OCFS2: ERROR (device dm-1): ocfs2_change_extent_flag: Owner 5668 has an extent at cpos 78723 which can no longer be found\n[  494.291609 ] On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted.\n[  494.292018 ] OCFS2: File system is now read-only.\n[  494.292224 ] (kworker/19:11,2628,19):ocfs2_mark_extent_written:5272 ERROR: status = -30\n[  494.292602 ] (kworker/19:11,2628,19):ocfs2_dio_end_io_write:2374 ERROR: status = -3\nfio: io_u error on file /mnt/scratch/racer: Read-only file system: write offset=460849152, buflen=131072\n=========================================================================\n\nIn __blockdev_direct_IO, ocfs2_dio_wr_get_block is called to add unwritten\nextents to a list.  extents are also inserted into extent tree in\nocfs2_write_begin_nolock.  Then another thread call fallocate to puch a\nhole at one of the unwritten extent.  The extent at cpos was removed by\nocfs2_remove_extent().  At end io worker thread, ocfs2_search_extent_list\nfound there is no such extent at the cpos.\n\n    T1                        T2                T3\n                              inode lock\n                                ...\n                                insert extents\n                                ...\n                              inode unlock\nocfs2_fallocate\n __ocfs2_change_file_space\n  inode lock\n  lock ip_alloc_sem\n  ocfs2_remove_inode_range inode\n   ocfs2_remove_btree_range\n    ocfs2_remove_extent\n    ^---remove the extent at cpos 78723\n  ...\n  unlock ip_alloc_sem\n  inode unlock\n                                       ocfs2_dio_end_io\n                                        ocfs2_dio_end_io_write\n                                         lock ip_alloc_sem\n                                         ocfs2_mark_extent_written\n                                          ocfs2_change_extent_flag\n                                           ocfs2_search_extent_list\n                                           ^---failed to find extent\n                                          ...\n                                          unlock ip_alloc_sem\n\nIn most filesystems, fallocate is not compatible with racing with AIO+DIO,\nso fix it by adding to wait for all dio before fallocate/punch_hole like\next4."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "b25801038da5",
                                            "version_value": "3c26b5d21b12"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "2.6.23",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "2.6.23",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.19.317",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.4.279",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.10.221",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.15.162",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.1.95",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.6.35",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.9.6",
                                                        "lessThanOrEqual": "6.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.10",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9"
            },
            {
                "url": "https://git.kernel.org/stable/c/e8e2db1adac47970a6a9225f3858e9aa0e86287f",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/e8e2db1adac47970a6a9225f3858e9aa0e86287f"
            },
            {
                "url": "https://git.kernel.org/stable/c/050ce8af6838c71e872e982b50d3f1bec21da40e",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/050ce8af6838c71e872e982b50d3f1bec21da40e"
            },
            {
                "url": "https://git.kernel.org/stable/c/38825ff9da91d2854dcf6d9ac320a7e641e10f25",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/38825ff9da91d2854dcf6d9ac320a7e641e10f25"
            },
            {
                "url": "https://git.kernel.org/stable/c/ea042dc2bea19d72e37c298bf65a9c341ef3fff3",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/ea042dc2bea19d72e37c298bf65a9c341ef3fff3"
            },
            {
                "url": "https://git.kernel.org/stable/c/3c361f313d696df72f9bccf058510e9ec737b9b1",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/3c361f313d696df72f9bccf058510e9ec737b9b1"
            },
            {
                "url": "https://git.kernel.org/stable/c/117b9c009b72a6c2ebfd23484354dfee2d9570d2",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/117b9c009b72a6c2ebfd23484354dfee2d9570d2"
            },
            {
                "url": "https://git.kernel.org/stable/c/952b023f06a24b2ad6ba67304c4c84d45bea2f18",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/952b023f06a24b2ad6ba67304c4c84d45bea2f18"
            }
        ]
    },
    "generator": {
        "engine": "bippy-9e1c9544281a"
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}