dm array: fix releasing a faulty array block twice in dm_array_cursor_end
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 l
CVE-2024-57929
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-57929
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "fdd1315aa5f022fe6574efdc2d9535f75a0ee255",
"lessThan": "9c7c03d0e926762adf3a3a0ba86156fb5e19538b",
"versionType": "git"
},
{
"status": "affected",
"version": "fdd1315aa5f022fe6574efdc2d9535f75a0ee255",
"lessThan": "fc1ef07c3522e257e32702954f265debbcb096a7",
"versionType": "git"
},
{
"status": "affected",
"version": "fdd1315aa5f022fe6574efdc2d9535f75a0ee255",
"lessThan": "738994872d77e189b2d13c501a1d145e95d98f46",
"versionType": "git"
},
{
"status": "affected",
"version": "fdd1315aa5f022fe6574efdc2d9535f75a0ee255",
"lessThan": "e477021d252c007f0c6d45b5d13d341efed03979",
"versionType": "git"
},
{
"status": "affected",
"version": "fdd1315aa5f022fe6574efdc2d9535f75a0ee255",
"lessThan": "6002bec5354f86d1a2df21468f68e3ec03ede9da",
"versionType": "git"
},
{
"status": "affected",
"version": "fdd1315aa5f022fe6574efdc2d9535f75a0ee255",
"lessThan": "017c4470bff53585370028fec9341247bad358ff",
"versionType": "git"
},
{
"status": "affected",
"version": "fdd1315aa5f022fe6574efdc2d9535f75a0ee255",
"lessThan": "f2893c0804d86230ffb8f1c8703fdbb18648abc8",
"versionType": "git"
}
],
"programFiles": [
"drivers/md/persistent-data/dm-array.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.290",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.234",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.177",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.125",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.72",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.10",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/md/persistent-data/dm-array.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-57929
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26850 · Revision 1
- Added to Heist Feed
- Publisher date