cve-2024-40943
Vulnerability from cvelistv5
Published
2024-07-12 12:25
Modified
2024-11-05 09:33
Severity ?
Summary
ocfs2: fix races between hole punching and AIO+DIO
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: 2.6.23
Show details on NVD website

To clipboard 

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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 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.\"}],\"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\"}]}}"
  }
}


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  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.