dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()
In the Linux kernel, the following vulnerability has been resolved: dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue() Add proper locking in mmp_pdma_residue() to prevent use-after-free when accessing descriptor list and descriptor contents. The race occurs when multiple threads call tx_status() while the tasklet on another CPU is freeing completed descriptors: CPU 0 CPU 1 ----- ----- mmp_pdma_tx_status() mmp_pdma_residue() -> NO LOCK held list_for_each_entry(sw, ..) DMA interrupt dma_do_tasklet() -> spin_lock(&desc_lock) list_move(sw->node, ...) spin_unlock(&desc_lock) | dma_pool_free(sw) <- FREED! -> access sw->desc <- UAF! This issue can be reproduced when running dmatest on the same channel with multiple threads (threads_per_chan > 1). Fix by protecting the chain_running list iteration and descriptor access with the chan->desc_lock spinlock.
CVE-2025-71221
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-2025-71221
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": "1b38da264674d6a0fe26a63996b8f88b88c3da48",
"lessThan": "3f0e0e2d9e752570041e95fd04635e2580097819",
"versionType": "git"
},
{
"status": "affected",
"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48",
"lessThan": "dfb5e05227745de43b7fd589721817a4337c970d",
"versionType": "git"
},
{
"status": "affected",
"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48",
"lessThan": "eba0c75670c022cb1f948600db972524bcfe8166",
"versionType": "git"
},
{
"status": "affected",
"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48",
"lessThan": "fc023b8fab057f0c910856ff36d3e12a30b7af4a",
"versionType": "git"
},
{
"status": "affected",
"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48",
"lessThan": "9f665b3c3d9a168410251f27a5d019b7bf93185c",
"versionType": "git"
},
{
"status": "affected",
"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48",
"lessThan": "a143545855bc2c6e1330f6f57ae375ac44af00a7",
"versionType": "git"
}
],
"programFiles": [
"drivers/dma/mmp_pdma.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.78",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.10",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/dma/mmp_pdma.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-71221
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #27150 · Revision 1
- Added to Heist Feed
- Publisher date