cve-2024-57929
Vulnerability from cvelistv5
Published
2025-01-19 11:52
Modified
2025-02-02 10:15
Severity ?
EPSS score ?
0.07%
(0.18271)
Summary
In the Linux kernel, the following vulnerability has been resolved:
dm array: fix releasing a faulty array block twice in dm_array_cursor_end
When dm_bm_read_lock() fails due to locking or checksum errors, it
releases the faulty block implicitly while leaving an invalid output
pointer behind. The caller of dm_bm_read_lock() should not operate on
this invalid dm_block pointer, or it will lead to undefined result.
For example, the dm_array_cursor incorrectly caches the invalid pointer
on reading a faulty array block, causing a double release in
dm_array_cursor_end(), then hitting the BUG_ON in dm-bufio cache_put().
Reproduce steps:
1. initialize a cache device
dmsetup create cmeta --table "0 8192 linear /dev/sdc 0"
dmsetup create cdata --table "0 65536 linear /dev/sdc 8192"
dmsetup create corig --table "0 524288 linear /dev/sdc $262144"
dd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1
dmsetup create cache --table "0 524288 cache /dev/mapper/cmeta \
/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0"
2. wipe the second array block offline
dmsteup remove cache cmeta cdata corig
mapping_root=$(dd if=/dev/sdc bs=1c count=8 skip=192 \
2>/dev/null | hexdump -e '1/8 "%u\n"')
ablock=$(dd if=/dev/sdc bs=1c count=8 skip=$((4096*mapping_root+2056)) \
2>/dev/null | hexdump -e '1/8 "%u\n"')
dd if=/dev/zero of=/dev/sdc bs=4k count=1 seek=$ablock
3. try reopen the cache device
dmsetup create cmeta --table "0 8192 linear /dev/sdc 0"
dmsetup create cdata --table "0 65536 linear /dev/sdc 8192"
dmsetup create corig --table "0 524288 linear /dev/sdc $262144"
dmsetup create cache --table "0 524288 cache /dev/mapper/cmeta \
/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0"
Kernel logs:
(snip)
device-mapper: array: array_block_check failed: blocknr 0 != wanted 10
device-mapper: block manager: array validator check failed for block 10
device-mapper: array: get_ablock failed
device-mapper: cache metadata: dm_array_cursor_next for mapping failed
------------[ cut here ]------------
kernel BUG at drivers/md/dm-bufio.c:638!
Fix by setting the cached block pointer to NULL on errors.
In addition to the reproducer described above, this fix can be
verified using the "array_cursor/damaged" test in dm-unit:
dm-unit run /pdata/array_cursor/damaged --kernel-dir <KERNEL_DIR>
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: fdd1315aa5f022fe6574efdc2d9535f75a0ee255 Version: fdd1315aa5f022fe6574efdc2d9535f75a0ee255 Version: fdd1315aa5f022fe6574efdc2d9535f75a0ee255 Version: fdd1315aa5f022fe6574efdc2d9535f75a0ee255 Version: fdd1315aa5f022fe6574efdc2d9535f75a0ee255 Version: fdd1315aa5f022fe6574efdc2d9535f75a0ee255 Version: fdd1315aa5f022fe6574efdc2d9535f75a0ee255 |
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|
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{ containers: { cna: { affected: [ { defaultStatus: "unaffected", product: "Linux", programFiles: [ "drivers/md/persistent-data/dm-array.c", ], repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", vendor: "Linux", versions: [ { lessThan: "9c7c03d0e926762adf3a3a0ba86156fb5e19538b", status: "affected", version: "fdd1315aa5f022fe6574efdc2d9535f75a0ee255", versionType: "git", }, { lessThan: "fc1ef07c3522e257e32702954f265debbcb096a7", status: "affected", version: "fdd1315aa5f022fe6574efdc2d9535f75a0ee255", versionType: "git", }, { lessThan: "738994872d77e189b2d13c501a1d145e95d98f46", status: "affected", version: "fdd1315aa5f022fe6574efdc2d9535f75a0ee255", versionType: "git", }, { lessThan: "e477021d252c007f0c6d45b5d13d341efed03979", status: "affected", version: "fdd1315aa5f022fe6574efdc2d9535f75a0ee255", versionType: "git", }, { lessThan: "6002bec5354f86d1a2df21468f68e3ec03ede9da", status: "affected", version: "fdd1315aa5f022fe6574efdc2d9535f75a0ee255", versionType: "git", }, { lessThan: "017c4470bff53585370028fec9341247bad358ff", status: "affected", version: "fdd1315aa5f022fe6574efdc2d9535f75a0ee255", versionType: "git", }, { lessThan: "f2893c0804d86230ffb8f1c8703fdbb18648abc8", status: "affected", version: "fdd1315aa5f022fe6574efdc2d9535f75a0ee255", versionType: "git", }, ], }, { defaultStatus: "affected", product: "Linux", programFiles: [ "drivers/md/persistent-data/dm-array.c", ], repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", vendor: "Linux", versions: [ { status: "affected", version: "4.9", }, { lessThan: "4.9", status: "unaffected", version: "0", versionType: "semver", }, { lessThanOrEqual: "5.4.*", status: "unaffected", version: "5.4.290", versionType: "semver", }, { lessThanOrEqual: "5.10.*", status: "unaffected", version: "5.10.234", versionType: "semver", }, { lessThanOrEqual: "5.15.*", status: "unaffected", version: "5.15.177", versionType: "semver", }, { lessThanOrEqual: "6.1.*", status: "unaffected", version: "6.1.125", versionType: "semver", }, { lessThanOrEqual: "6.6.*", status: "unaffected", version: "6.6.72", versionType: "semver", }, { lessThanOrEqual: "6.12.*", status: "unaffected", version: "6.12.10", versionType: "semver", }, { lessThanOrEqual: "*", status: "unaffected", version: "6.13", versionType: "original_commit_for_fix", }, ], }, ], 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>", }, ], providerMetadata: { dateUpdated: "2025-02-02T10:15:47.756Z", orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", shortName: "Linux", }, 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-5f407fcff5a0", }, }, }, cveMetadata: { assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67", assignerShortName: "Linux", cveId: "CVE-2024-57929", datePublished: "2025-01-19T11:52:46.096Z", dateReserved: "2025-01-19T11:50:08.376Z", dateUpdated: "2025-02-02T10:15:47.756Z", state: "PUBLISHED", }, dataType: "CVE_RECORD", dataVersion: "5.1", "vulnerability-lookup:meta": { nvd: "{\"cve\":{\"id\":\"CVE-2024-57929\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-01-19T12:15:27.013\",\"lastModified\":\"2025-02-02T11:15:14.227\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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>\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dm array: se corrige la liberación de un bloque de matriz defectuoso dos veces en dm_array_cursor_end Cuando dm_bm_read_lock() falla debido a errores de bloqueo o suma de comprobación, libera el bloque defectuoso implícitamente mientras deja atrás un puntero de salida no válido. El llamador de dm_bm_read_lock() no debe operar en este puntero dm_block no válido, o conducirá a un resultado indefinido. Por ejemplo, dm_array_cursor almacena en caché incorrectamente el puntero no válido al leer un bloque de matriz defectuoso, lo que causa una doble liberación en dm_array_cursor_end(), y luego alcanza el BUG_ON en dm-bufio cache_put(). Reproducir los pasos: 1. inicializar un dispositivo de caché dmsetup create cmeta --table \\\"0 8192 linear /dev/sdc 0\\\" dmsetup create cdata --table \\\"0 65536 linear /dev/sdc 8192\\\" dmsetup create corig --table \\\"0 524288 linear /dev/sdc $262144\\\" dd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 dmsetup create cache --table \\\"0 524288 cache /dev/mapper/cmeta \\\\ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\\\" 2. borrar el segundo bloque de matriz sin conexión dmsteup remove cache cmeta cdata corig mapping_root=$(dd if=/dev/sdc bs=1c count=8 skip=192 \\\\ 2>/dev/null | hexdump -e '1/8 \\\"%u\\\\n\\\"') ablock=$(dd if=/dev/sdc bs=1c count=8 skip=$((4096*mapping_root+2056)) \\\\ 2>/dev/null | hexdump -e '1/8 \\\"%u\\\\n\\\"') dd if=/dev/zero of=/dev/sdc bs=4k count=1 seek=$ablock 3. Intente volver a abrir el dispositivo de caché dmsetup create cmeta --table \\\"0 8192 lineal /dev/sdc 0\\\" dmsetup create cdata --table \\\"0 65536 lineal /dev/sdc 8192\\\" dmsetup create corig --table \\\"0 524288 lineal /dev/sdc $262144\\\" dmsetup create cache --table \\\"0 524288 caché /dev/mapper/cmeta \\\\ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\\\" Registros del kernel: (snip) device-mapper: array: array_block_check failed: blocknr 0 != wanted 10 device-mapper: block manager: array validator check failed for block 10 device-mapper: array: get_ablock failed device-mapper: cache metadata: dm_array_cursor_next for mapping failed ------------[ corte aquí ]------------ ¡ERROR del kernel en drivers/md/dm-bufio.c:638! Se corrige configurando el puntero de bloque en caché en NULL en caso de errores. Además del reproductor descrito anteriormente, esta corrección se puede verificar utilizando la prueba \\\"array_cursor/damaged\\\" en dm-unit: dm-unit run /pdata/array_cursor/damaged --kernel-dir \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/017c4470bff53585370028fec9341247bad358ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6002bec5354f86d1a2df21468f68e3ec03ede9da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/738994872d77e189b2d13c501a1d145e95d98f46\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9c7c03d0e926762adf3a3a0ba86156fb5e19538b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e477021d252c007f0c6d45b5d13d341efed03979\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f2893c0804d86230ffb8f1c8703fdbb18648abc8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fc1ef07c3522e257e32702954f265debbcb096a7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}", }, }
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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