cve-2024-40943
Vulnerability from cvelistv5
Published
2024-07-12 12:25
Modified
2024-12-19 09:08
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix races between hole punching and AIO+DIO After commit "ocfs2: return real error code in ocfs2_dio_wr_get_block", fstests/generic/300 become from always failed to sometimes failed: ======================================================================== [ 473.293420 ] run fstests generic/300 [ 475.296983 ] JBD2: Ignoring recovery information on journal [ 475.302473 ] ocfs2: Mounting device (253,1) on (node local, slot 0) with ordered data mode. [ 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 [ 494.291609 ] On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. [ 494.292018 ] OCFS2: File system is now read-only. [ 494.292224 ] (kworker/19:11,2628,19):ocfs2_mark_extent_written:5272 ERROR: status = -30 [ 494.292602 ] (kworker/19:11,2628,19):ocfs2_dio_end_io_write:2374 ERROR: status = -3 fio: io_u error on file /mnt/scratch/racer: Read-only file system: write offset=460849152, buflen=131072 ========================================================================= In __blockdev_direct_IO, ocfs2_dio_wr_get_block is called to add unwritten extents to a list. extents are also inserted into extent tree in ocfs2_write_begin_nolock. Then another thread call fallocate to puch a hole at one of the unwritten extent. The extent at cpos was removed by ocfs2_remove_extent(). At end io worker thread, ocfs2_search_extent_list found there is no such extent at the cpos. T1 T2 T3 inode lock ... insert extents ... inode unlock ocfs2_fallocate __ocfs2_change_file_space inode lock lock ip_alloc_sem ocfs2_remove_inode_range inode ocfs2_remove_btree_range ocfs2_remove_extent ^---remove the extent at cpos 78723 ... unlock ip_alloc_sem inode unlock ocfs2_dio_end_io ocfs2_dio_end_io_write lock ip_alloc_sem ocfs2_mark_extent_written ocfs2_change_extent_flag ocfs2_search_extent_list ^---failed to find extent ... unlock ip_alloc_sem In most filesystems, fallocate is not compatible with racing with AIO+DIO, so fix it by adding to wait for all dio before fallocate/punch_hole like ext4.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/050ce8af6838c71e872e982b50d3f1bec21da40e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/117b9c009b72a6c2ebfd23484354dfee2d9570d2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/38825ff9da91d2854dcf6d9ac320a7e641e10f25
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3c361f313d696df72f9bccf058510e9ec737b9b1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/952b023f06a24b2ad6ba67304c4c84d45bea2f18
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e8e2db1adac47970a6a9225f3858e9aa0e86287f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea042dc2bea19d72e37c298bf65a9c341ef3fff3
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/050ce8af6838c71e872e982b50d3f1bec21da40e
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/117b9c009b72a6c2ebfd23484354dfee2d9570d2
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/38825ff9da91d2854dcf6d9ac320a7e641e10f25
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3c361f313d696df72f9bccf058510e9ec737b9b1
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/952b023f06a24b2ad6ba67304c4c84d45bea2f18
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e8e2db1adac47970a6a9225f3858e9aa0e86287f
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ea042dc2bea19d72e37c298bf65a9c341ef3fff3
Impacted products
Vendor Product Version
Linux Linux Version: b25801038da5823bba1b5440a57ca68afc51b6bd
Version: b25801038da5823bba1b5440a57ca68afc51b6bd
Version: b25801038da5823bba1b5440a57ca68afc51b6bd
Version: b25801038da5823bba1b5440a57ca68afc51b6bd
Version: b25801038da5823bba1b5440a57ca68afc51b6bd
Version: b25801038da5823bba1b5440a57ca68afc51b6bd
Version: b25801038da5823bba1b5440a57ca68afc51b6bd
Version: b25801038da5823bba1b5440a57ca68afc51b6bd
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   Linux Linux Version: 2.6.23
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      nvd: "{\"cve\":{\"id\":\"CVE-2024-40943\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-12T13:15:16.670\",\"lastModified\":\"2024-11-21T09:31:55.223\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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 resolvió la siguiente vulnerabilidad: ocfs2: corrige ejecuciones entre perforación y AIO+DIO Después de confirmar \\\"ocfs2: devuelve código de error real en ocfs2_dio_wr_get_block\\\", fstests/generic/300 pasa de siempre falló a a veces falló: = ==================================================== ===================== [ 473.293420 ] ejecute fstests generic/300 [ 475.296983 ] JBD2: ignorando la información de recuperación 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 extensión en cpos 78723 que ya no se puede encontrar [ 494.291609 ] Se descubrió corrupción en el disco. Ejecute fsck.ocfs2 una vez que el sistema de archivos esté 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 también se insertan en el árbol 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 extensión en cpos fue eliminada por ocfs2_remove_extent(). Al final del hilo de trabajo de io, ocfs2_search_extent_list descubrió que no existe tal extensión 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 extensión 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 extensión... desbloquear ip_alloc_sem En la mayoría de los sistemas de archivos, fallocate no es compatible con ejecuciones con AIO+DIO, así que solucionelo agregando esperar a que todos los dio antes de fallocate/punch_hole como ext4.\"}],\"metrics\":{},\"references\":[{\"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\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"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\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
      vulnrichment: {
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{\"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\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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