Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7eacba9a083be65c0f251c19380ec01147c01ebc before 13ec849fd2eab808ee8eba2625df7ebea3b85edf; affected 7eacba9a083be65c0f251c19380ec01147c01ebc before 57a9fb47551b33cde7b76d17c0072c3b394f4620; affected 7eacba9a083be65c0f251c19380ec01147c01ebc before 2fda391ef7a701748abd7fa32232981b522c1e07; affected 7eacba9a083be65c0f251c19380ec01147c01ebc before 149a5c38436c229950cf1020992ce65c9549bc19; affected 7eacba9a083be65c0f251c19380ec01147c01ebc before 106a6de46cf4887d535018185ec528ce822d6d84 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.87 through 6.6.*; unaffected 6.12.23 through 6.12.*; unaffected 6.13.11 through 6.13.*; unaffected 6.14.2 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/13ec849fd2eab808ee8eba2625df7ebea3b85edf
- https://git.kernel.org/stable/c/57a9fb47551b33cde7b76d17c0072c3b394f4620
- https://git.kernel.org/stable/c/2fda391ef7a701748abd7fa32232981b522c1e07
- https://git.kernel.org/stable/c/149a5c38436c229950cf1020992ce65c9549bc19
- https://git.kernel.org/stable/c/106a6de46cf4887d535018185ec528ce822d6d84