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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
7eacba9a083be65c0f251c19380ec01147c01ebc to < 13ec849fd2eab808ee8eba2625df7ebea3b85edfaffected7eacba9a083be65c0f251c19380ec01147c01ebc to < 57a9fb47551b33cde7b76d17c0072c3b394f4620affected7eacba9a083be65c0f251c19380ec01147c01ebc to < 2fda391ef7a701748abd7fa32232981b522c1e07affected7eacba9a083be65c0f251c19380ec01147c01ebc to < 149a5c38436c229950cf1020992ce65c9549bc19affected7eacba9a083be65c0f251c19380ec01147c01ebc to < 106a6de46cf4887d535018185ec528ce822d6d84affected
Linux Linux
Default version status: affected
6.6affected0 to < 6.6unaffected6.6.87 to ≤ 6.6.*unaffected6.12.23 to ≤ 6.12.*unaffected6.13.11 to ≤ 6.13.*unaffected6.14.2 to ≤ 6.14.*unaffected6.15 to ≤ *unaffected
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 ↗