CVE-2024-40943 (GCVE-0-2024-40943)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:25 – Updated: 2025-11-03 21:58
VLAI?
Title
ocfs2: fix races between hole punching and AIO+DIO
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b25801038da5823bba1b5440a57ca68afc51b6bd , < 3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9 (git)
Affected: b25801038da5823bba1b5440a57ca68afc51b6bd , < e8e2db1adac47970a6a9225f3858e9aa0e86287f (git)
Affected: b25801038da5823bba1b5440a57ca68afc51b6bd , < 050ce8af6838c71e872e982b50d3f1bec21da40e (git)
Affected: b25801038da5823bba1b5440a57ca68afc51b6bd , < 38825ff9da91d2854dcf6d9ac320a7e641e10f25 (git)
Affected: b25801038da5823bba1b5440a57ca68afc51b6bd , < ea042dc2bea19d72e37c298bf65a9c341ef3fff3 (git)
Affected: b25801038da5823bba1b5440a57ca68afc51b6bd , < 3c361f313d696df72f9bccf058510e9ec737b9b1 (git)
Affected: b25801038da5823bba1b5440a57ca68afc51b6bd , < 117b9c009b72a6c2ebfd23484354dfee2d9570d2 (git)
Affected: b25801038da5823bba1b5440a57ca68afc51b6bd , < 952b023f06a24b2ad6ba67304c4c84d45bea2f18 (git)
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    Linux Linux Affected: 2.6.23
Unaffected: 0 , < 2.6.23 (semver)
Unaffected: 4.19.317 , ≤ 4.19.* (semver)
Unaffected: 5.4.279 , ≤ 5.4.* (semver)
Unaffected: 5.10.221 , ≤ 5.10.* (semver)
Unaffected: 5.15.162 , ≤ 5.15.* (semver)
Unaffected: 6.1.95 , ≤ 6.1.* (semver)
Unaffected: 6.6.35 , ≤ 6.6.* (semver)
Unaffected: 6.9.6 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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\"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-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.317\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.279\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.221\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.162\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.95\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.35\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.6\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"2.6.23\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:18:29.194Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40943\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T21:58:12.745Z\", \"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": "5.2"
    }
  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.