{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-40943", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.588Z", "datePublished": "2024-07-12T12:25:17.813Z", "dateUpdated": "2024-12-19T09:08:39.819Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T09:08:39.819Z"}, "descriptions": [{"lang": "en", "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/file.c"], "versions": [{"version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "lessThan": "3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9", "status": "affected", "versionType": "git"}, {"version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "lessThan": "e8e2db1adac47970a6a9225f3858e9aa0e86287f", "status": "affected", "versionType": "git"}, {"version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "lessThan": "050ce8af6838c71e872e982b50d3f1bec21da40e", "status": "affected", "versionType": "git"}, {"version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "lessThan": "38825ff9da91d2854dcf6d9ac320a7e641e10f25", "status": "affected", "versionType": "git"}, {"version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "lessThan": "ea042dc2bea19d72e37c298bf65a9c341ef3fff3", "status": "affected", "versionType": "git"}, {"version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "lessThan": "3c361f313d696df72f9bccf058510e9ec737b9b1", "status": "affected", "versionType": "git"}, {"version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "lessThan": "117b9c009b72a6c2ebfd23484354dfee2d9570d2", "status": "affected", "versionType": "git"}, {"version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "lessThan": "952b023f06a24b2ad6ba67304c4c84d45bea2f18", "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/ocfs2/file.c"], "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"}]}], "references": [{"url": "https://git.kernel.org/stable/c/3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9"}, {"url": "https://git.kernel.org/stable/c/e8e2db1adac47970a6a9225f3858e9aa0e86287f"}, {"url": "https://git.kernel.org/stable/c/050ce8af6838c71e872e982b50d3f1bec21da40e"}, {"url": "https://git.kernel.org/stable/c/38825ff9da91d2854dcf6d9ac320a7e641e10f25"}, {"url": "https://git.kernel.org/stable/c/ea042dc2bea19d72e37c298bf65a9c341ef3fff3"}, {"url": "https://git.kernel.org/stable/c/3c361f313d696df72f9bccf058510e9ec737b9b1"}, {"url": 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"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:39:55.471Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-40943", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T17:04:20.780555Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:22.561Z"}}], "cna": {"title": "ocfs2: fix races between hole punching and AIO+DIO", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b25801038da5", "lessThan": "3c26b5d21b12", "versionType": "git"}, {"status": "affected", "version": "b25801038da5", "lessThan": "e8e2db1adac4", "versionType": "git"}, {"status": "affected", "version": "b25801038da5", "lessThan": "050ce8af6838", "versionType": "git"}, {"status": "affected", "version": "b25801038da5", "lessThan": "38825ff9da91", "versionType": "git"}, {"status": "affected", "version": "b25801038da5", "lessThan": "ea042dc2bea1", "versionType": "git"}, {"status": "affected", "version": "b25801038da5", "lessThan": "3c361f313d69", "versionType": "git"}, {"status": "affected", "version": "b25801038da5", "lessThan": "117b9c009b72", "versionType": "git"}, {"status": "affected", "version": "b25801038da5", "lessThan": "952b023f06a2", "versionType": "git"}], "programFiles": ["fs/ocfs2/file.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.23"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.23", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.317", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.279", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.221", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.162", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.95", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.35", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.9.6", "versionType": "semver", "lessThanOrEqual": "6.9.*"}, {"status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ocfs2/file.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9"}, {"url": "https://git.kernel.org/stable/c/e8e2db1adac47970a6a9225f3858e9aa0e86287f"}, {"url": "https://git.kernel.org/stable/c/050ce8af6838c71e872e982b50d3f1bec21da40e"}, {"url": "https://git.kernel.org/stable/c/38825ff9da91d2854dcf6d9ac320a7e641e10f25"}, {"url": "https://git.kernel.org/stable/c/ea042dc2bea19d72e37c298bf65a9c341ef3fff3"}, {"url": "https://git.kernel.org/stable/c/3c361f313d696df72f9bccf058510e9ec737b9b1"}, {"url": "https://git.kernel.org/stable/c/117b9c009b72a6c2ebfd23484354dfee2d9570d2"}, {"url": "https://git.kernel.org/stable/c/952b023f06a24b2ad6ba67304c4c84d45bea2f18"}], "x_generator": {"engine": "bippy-9e1c9544281a"}, "descriptions": [{"lang": "en", "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."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-05T09:33:39.080Z"}}}, "cveMetadata": {"cveId": "CVE-2024-40943", "state": "PUBLISHED", "dateUpdated": "2024-11-05T09:33:39.080Z", "dateReserved": "2024-07-12T12:17:45.588Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-07-12T12:25:17.813Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"descriptions": [{"lang": "en", "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."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ocfs2: corrige ejecuciones entre perforaci\u00f3n y AIO+DIO Despu\u00e9s de confirmar \"ocfs2: devuelve c\u00f3digo de error real en ocfs2_dio_wr_get_block\", fstests/generic/300 pasa de siempre fall\u00f3 a a veces fall\u00f3: = ==================================================== ===================== [ 473.293420 ] ejecute fstests generic/300 [ 475.296983 ] JBD2: ignorando la informaci\u00f3n de recuperaci\u00f3n en el diario [ 475.302473 ] ocfs2: Dispositivo de montaje (253,1 ) en (nodo local, ranura 0) con modo de datos ordenados. [ 494.290998 ] OCFS2: ERROR (dispositivo dm-1): ocfs2_change_extent_flag: El propietario 5668 tiene una extensi\u00f3n en cpos 78723 que ya no se puede encontrar [ 494.291609 ] Se descubri\u00f3 corrupci\u00f3n en el disco. Ejecute fsck.ocfs2 una vez que el sistema de archivos est\u00e9 desmontado. [ 494.292018 ] OCFS2: el sistema de archivos ahora es de solo lectura. [ 494.292224 ] (kworker/19:11,2628,19):ocfs2_mark_extent_write:5272 ERROR: estado = -30 [ 494.292602 ] (kworker/19:11,2628,19):ocfs2_dio_end_io_write:2374 ERROR: estado = -3 fio: Error io_u en el archivo /mnt/scratch/racer: sistema de archivos de solo lectura: escritura offset=460849152, buflen=131072 ========================== ================================================= En __blockdev_direct_IO , se llama a ocfs2_dio_wr_get_block para agregar extensiones no escritas a una lista. Las extensiones tambi\u00e9n se insertan en el \u00e1rbol de extensiones en ocfs2_write_begin_nolock. Luego, otro hilo llama a fallocate para hacer un agujero en una de las extensiones no escritas. La extensi\u00f3n en cpos fue eliminada por ocfs2_remove_extent(). Al final del hilo de trabajo de io, ocfs2_search_extent_list descubri\u00f3 que no existe tal extensi\u00f3n en los cpos. T1 T2 T3 bloqueo de inodo... insertar extensiones... desbloqueo de inodo ocfs2_fallocate __ocfs2_change_file_space bloqueo de inodo bloqueo ip_alloc_sem ocfs2_remove_inode_range inodo ocfs2_remove_btree_range ocfs2_remove_extent ^---eliminar la extensi\u00f3n en cpos 78723... desbloquear inodo ip_alloc_sem desbloquear ocfs2_dio_end_io ocfs2_dio_end_io_write bloquear ip_alloc_sem ocfs2_mark_extent_writing ocfs2_change_extent_flag ocfs2_search_extent_list ^ ---no se pudo encontrar la extensi\u00f3n... desbloquear ip_alloc_sem En la mayor\u00eda de los sistemas de archivos, fallocate no es compatible con ejecuciones con AIO+DIO, as\u00ed que solucionelo agregando esperar a que todos los dio antes de fallocate/punch_hole como ext4."}], "id": "CVE-2024-40943", "lastModified": "2024-11-21T09:31:55.223", "metrics": {}, "published": "2024-07-12T13:15:16.670", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/050ce8af6838c71e872e982b50d3f1bec21da40e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/117b9c009b72a6c2ebfd23484354dfee2d9570d2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38825ff9da91d2854dcf6d9ac320a7e641e10f25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c361f313d696df72f9bccf058510e9ec737b9b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/952b023f06a24b2ad6ba67304c4c84d45bea2f18"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e8e2db1adac47970a6a9225f3858e9aa0e86287f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea042dc2bea19d72e37c298bf65a9c341ef3fff3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/050ce8af6838c71e872e982b50d3f1bec21da40e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/117b9c009b72a6c2ebfd23484354dfee2d9570d2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/38825ff9da91d2854dcf6d9ac320a7e641e10f25"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/3c361f313d696df72f9bccf058510e9ec737b9b1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/952b023f06a24b2ad6ba67304c4c84d45bea2f18"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/e8e2db1adac47970a6a9225f3858e9aa0e86287f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/ea042dc2bea19d72e37c298bf65a9c341ef3fff3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: ocfs2: fix races between hole punching and AIO+DIO", "id": "2297527", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2297527"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nocfs2: fix races between hole punching and AIO+DIO\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[ 473.293420 ] run fstests generic/300\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=========================================================================\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.\nT1 T2 T3\ninode lock\n...\ninsert extents\n...\ninode unlock\nocfs2_fallocate\n__ocfs2_change_file_space\ninode lock\nlock ip_alloc_sem\nocfs2_remove_inode_range inode\nocfs2_remove_btree_range\nocfs2_remove_extent\n^---remove the extent at cpos 78723\n...\nunlock ip_alloc_sem\ninode unlock\nocfs2_dio_end_io\nocfs2_dio_end_io_write\nlock ip_alloc_sem\nocfs2_mark_extent_written\nocfs2_change_extent_flag\nocfs2_search_extent_list\n^---failed to find extent\n...\nunlock ip_alloc_sem\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."], "name": "CVE-2024-40943", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-40943\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-40943\nhttps://lore.kernel.org/linux-cve-announce/2024071219-CVE-2024-40943-b7ee@gregkh/T"], "threat_severity": "Low", "upstream_fix": "kernel 4.19.317, kernel 5.4.279, kernel 5.10.221, kernel 5.15.162, kernel 6.1.95, kernel 6.6.35, kernel 6.9.6, kernel 6.10-rc1"}