udmabuf: fix memory leak on last export_udmabuf() error path
In the Linux kernel, the following vulnerability has been resolved: udmabuf: fix memory leak on last export_udmabuf() error path In export_udmabuf(), if dma_buf_fd() fails because the FD table is full, a dma_buf owning the udmabuf has already been created; but the error handling in udmabuf_create() will tear down the udmabuf without doing anything about the containing dma_buf. This leaves a dma_buf in memory that contains a dangling pointer; though that doesn't seem to lead to anything bad except a memory leak. Fix it by moving the dma_buf_fd() call out of export_udmabuf() so that we can give it different error handling. Note that the shape of this code changed a lot in commit 5e72b2b41a21 ("udmabuf: convert udmabuf driver to use folios"); but the memory leak seems to have existed since the introduction of udmabuf.
CVE-2024-56712
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-2024-56712
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": "fbb0de795078190a9834b3409e4b009cfb18a6d4",
"lessThan": "e469922fbdf6ad729e5dc8d49289b5036a0ecdf8",
"versionType": "git"
},
{
"status": "affected",
"version": "fbb0de795078190a9834b3409e4b009cfb18a6d4",
"lessThan": "c9fc8428d4255c2128da9c4d5cd92e554d0150cf",
"versionType": "git"
},
{
"status": "affected",
"version": "fbb0de795078190a9834b3409e4b009cfb18a6d4",
"lessThan": "f49856f525acd5bef52ae28b7da2e001bbe7439e",
"versionType": "git"
}
],
"programFiles": [
"drivers/dma-buf/udmabuf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.20"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.7",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/dma-buf/udmabuf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-56712
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #45926 · Revision 1
- Added to Heist Feed
- Publisher date