cve-2021-47108
Vulnerability from cvelistv5
Published
2024-03-04 18:15
Modified
2024-12-19 07:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: hdmi: Perform NULL pointer check for mtk_hdmi_conf In commit 41ca9caaae0b ("drm/mediatek: hdmi: Add check for CEA modes only") a check for CEA modes was added to function mtk_hdmi_bridge_mode_valid() in order to address possible issues on MT8167; moreover, with commit c91026a938c2 ("drm/mediatek: hdmi: Add optional limit on maximal HDMI mode clock") another similar check was introduced. Unfortunately though, at the time of writing, MT8173 does not provide any mtk_hdmi_conf structure and this is crashing the kernel with NULL pointer upon entering mtk_hdmi_bridge_mode_valid(), which happens as soon as a HDMI cable gets plugged in. To fix this regression, add a NULL pointer check for hdmi->conf in the said function, restoring HDMI functionality and avoiding NULL pointer kernel panics.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b8e19a0aa3933a785be9f1541afd8d398c4ec69
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/71d07ebc5000b9c1d140e99e7493b0bafa954776
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3b8e19a0aa3933a785be9f1541afd8d398c4ec69
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/71d07ebc5000b9c1d140e99e7493b0bafa954776
Impacted products
Vendor Product Version
Linux Linux Version: 5.14
Show details on NVD website

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