drm/msm/dp: Drop aux devices together with DP controller
In the Linux kernel, the following vulnerability has been resolved: drm/msm/dp: Drop aux devices together with DP controller Using devres to depopulate the aux bus made sure that upon a probe deferral the EDP panel device would be destroyed and recreated upon next attempt. But the struct device which the devres is tied to is the DPUs (drm_dev->dev), which may be happen after the DP controller is torn down. Indications of this can be seen in the commonly seen EDID-hexdump full of zeros in the log, or the occasional/rare KASAN fault where the panel's attempt to read the EDID information causes a use after free on DP resources. It's tempting to move the devres to the DP controller's struct device, but the resources used by the device(s) on the aux bus are explicitly torn down in the error path. The KASAN-reported use-after-free also remains, as the DP aux "module" explicitly frees its devres-allocated memory in this code path. As such, explicitly depopulate the aux bus in the error path, and in the component unbind path, to avoid these issues. Patchwork: https://patchwork.freedesktop.org/patch/542163/
CVE-2023-53851
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-2023-53851
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": "2b57f726611e294dc4297dd48eb8c98ef1938e82",
"lessThan": "ff1338a3bfaa2f35b5f49a434f2ad6884b75fafe",
"versionType": "git"
},
{
"status": "affected",
"version": "2b57f726611e294dc4297dd48eb8c98ef1938e82",
"lessThan": "e09ed06938807cb113cddd0708ed74bd8cdaff33",
"versionType": "git"
},
{
"status": "affected",
"version": "2b57f726611e294dc4297dd48eb8c98ef1938e82",
"lessThan": "2fde37445807e6e6d7981402d0bf1be0e5d81291",
"versionType": "git"
},
{
"status": "affected",
"version": "2b57f726611e294dc4297dd48eb8c98ef1938e82",
"lessThan": "a7bfb2ad2184a1fba78be35209b6019aa8cc8d4d",
"versionType": "git"
},
{
"status": "affected",
"version": "8768663188e4169333f66583e4d2432e65c421df",
"versionType": "git"
},
{
"status": "affected",
"version": "6.0.7",
"lessThan": "6.1",
"versionType": "semver"
}
],
"programFiles": [
"drivers/gpu/drm/msm/dp/dp_display.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.3.13",
"versionType": "semver",
"lessThanOrEqual": "6.3.*"
},
{
"status": "unaffected",
"version": "6.4.4",
"versionType": "semver",
"lessThanOrEqual": "6.4.*"
},
{
"status": "unaffected",
"version": "6.5",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/msm/dp/dp_display.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2023-53851
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #8220 · Revision 1
- Added to Heist Feed
- Publisher date