{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-57929","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-01-19T11:50:08.376Z","datePublished":"2025-01-19T11:52:46.096Z","dateUpdated":"2025-11-03T20:55:57.853Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T10:06:51.929Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm array: fix releasing a faulty array block twice in dm_array_cursor_end\n\nWhen dm_bm_read_lock() fails due to locking or checksum errors, it\nreleases the faulty block implicitly while leaving an invalid output\npointer behind. The caller of dm_bm_read_lock() should not operate on\nthis invalid dm_block pointer, or it will lead to undefined result.\nFor example, the dm_array_cursor incorrectly caches the invalid pointer\non reading a faulty array block, causing a double release in\ndm_array_cursor_end(), then hitting the BUG_ON in dm-bufio cache_put().\n\nReproduce steps:\n\n1. initialize a cache device\n\ndmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\"\ndmsetup create cdata --table \"0 65536 linear /dev/sdc 8192\"\ndmsetup create corig --table \"0 524288 linear /dev/sdc $262144\"\ndd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1\ndmsetup create cache --table \"0 524288 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\"\n\n2. wipe the second array block offline\n\ndmsteup remove cache cmeta cdata corig\nmapping_root=$(dd if=/dev/sdc bs=1c count=8 skip=192 \\\n2>/dev/null | hexdump -e '1/8 \"%u\\n\"')\nablock=$(dd if=/dev/sdc bs=1c count=8 skip=$((4096*mapping_root+2056)) \\\n2>/dev/null | hexdump -e '1/8 \"%u\\n\"')\ndd if=/dev/zero of=/dev/sdc bs=4k count=1 seek=$ablock\n\n3. try reopen the cache device\n\ndmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\"\ndmsetup create cdata --table \"0 65536 linear /dev/sdc 8192\"\ndmsetup create corig --table \"0 524288 linear /dev/sdc $262144\"\ndmsetup create cache --table \"0 524288 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\"\n\nKernel logs:\n\n(snip)\ndevice-mapper: array: array_block_check failed: blocknr 0 != wanted 10\ndevice-mapper: block manager: array validator check failed for block 10\ndevice-mapper: array: get_ablock failed\ndevice-mapper: cache metadata: dm_array_cursor_next for mapping failed\n------------[ cut here ]------------\nkernel BUG at drivers/md/dm-bufio.c:638!\n\nFix by setting the cached block pointer to NULL on errors.\n\nIn addition to the reproducer described above, this fix can be\nverified using the \"array_cursor/damaged\" test in dm-unit:\n  dm-unit run /pdata/array_cursor/damaged --kernel-dir <KERNEL_DIR>"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/persistent-data/dm-array.c"],"versions":[{"version":"fdd1315aa5f022fe6574efdc2d9535f75a0ee255","lessThan":"9c7c03d0e926762adf3a3a0ba86156fb5e19538b","status":"affected","versionType":"git"},{"version":"fdd1315aa5f022fe6574efdc2d9535f75a0ee255","lessThan":"fc1ef07c3522e257e32702954f265debbcb096a7","status":"affected","versionType":"git"},{"version":"fdd1315aa5f022fe6574efdc2d9535f75a0ee255","lessThan":"738994872d77e189b2d13c501a1d145e95d98f46","status":"affected","versionType":"git"},{"version":"fdd1315aa5f022fe6574efdc2d9535f75a0ee255","lessThan":"e477021d252c007f0c6d45b5d13d341efed03979","status":"affected","versionType":"git"},{"version":"fdd1315aa5f022fe6574efdc2d9535f75a0ee255","lessThan":"6002bec5354f86d1a2df21468f68e3ec03ede9da","status":"affected","versionType":"git"},{"version":"fdd1315aa5f022fe6574efdc2d9535f75a0ee255","lessThan":"017c4470bff53585370028fec9341247bad358ff","status":"affected","versionType":"git"},{"version":"fdd1315aa5f022fe6574efdc2d9535f75a0ee255","lessThan":"f2893c0804d86230ffb8f1c8703fdbb18648abc8","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/persistent-data/dm-array.c"],"versions":[{"version":"4.9","status":"affected"},{"version":"0","lessThan":"4.9","status":"unaffected","versionType":"semver"},{"version":"5.4.290","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.234","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.177","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.125","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.72","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.10","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.13","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.4.290"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.10.234"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.15.177"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.1.125"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.6.72"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.12.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/9c7c03d0e926762adf3a3a0ba86156fb5e19538b"},{"url":"https://git.kernel.org/stable/c/fc1ef07c3522e257e32702954f265debbcb096a7"},{"url":"https://git.kernel.org/stable/c/738994872d77e189b2d13c501a1d145e95d98f46"},{"url":"https://git.kernel.org/stable/c/e477021d252c007f0c6d45b5d13d341efed03979"},{"url":"https://git.kernel.org/stable/c/6002bec5354f86d1a2df21468f68e3ec03ede9da"},{"url":"https://git.kernel.org/stable/c/017c4470bff53585370028fec9341247bad358ff"},{"url":"https://git.kernel.org/stable/c/f2893c0804d86230ffb8f1c8703fdbb18648abc8"}],"title":"dm array: fix releasing a faulty array block twice in dm_array_cursor_end","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T20:55:57.853Z"}}]}}