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Unrated severityNVD Advisory· Published Apr 18, 2025· Updated May 26, 2025

drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr

CVE-2025-38240

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr

The function mtk_dp_wait_hpd_asserted() may be called before the mtk_dp->drm_dev pointer is assigned in mtk_dp_bridge_attach(). Specifically it can be called via this callpath: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe

Using "drm" level prints anywhere in this callpath causes a NULL pointer dereference. Change the error message directly in mtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the error messages in mtk_dp_parse_capabilities(), which is called by mtk_dp_wait_hpd_asserted().

While touching these prints, also add the error code to them to make future debugging easier.

Affected products

80

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

5

News mentions

0

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