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.
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Affected Vendors & Products
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History
Sat, 19 Apr 2025 02:00:00 +0000
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cvssV3_1
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Fri, 18 Apr 2025 07:15:00 +0000
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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. | |
Title | drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr | |
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Status: PUBLISHED
Assigner: Linux
Published: 2025-04-18T07:01:32.338Z
Updated: 2025-05-26T05:25:21.005Z
Reserved: 2025-04-16T04:51:23.996Z
Link: CVE-2025-38240

No data.

Status : Awaiting Analysis
Published: 2025-04-18T07:15:43.510
Modified: 2025-04-21T14:23:45.950
Link: CVE-2025-38240
