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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | Mar 4, 2024 |
| Suse | — | Upgrade kernel-rt-extraUpgrade kselftests-kmp-rtUpgrade kernel-rt-livepatch-develUpgrade dtb-sprdUpgrade dtb-socionextUpgrade kernel-rt_debug-vdsoUpgrade kselftests-kmp-defaultUpgrade kernel-azureUpgrade reiserfs-kmp-defaultUpgrade kernel-obs-buildUpgrade kernel-default-base-rebuildUpgrade kernel-source-vanillaUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-64kb-extraUpgrade dlm-kmp-rtUpgrade dlm-kmp-defaultUpgrade dtb-armUpgrade kernel-azure-vdsoUpgrade kernel-rt-develUpgrade ocfs2-kmp-azureUpgrade dtb-rockchipUpgrade kernel-debug-vdsoUpgrade kernel-syms-rtUpgrade dtb-allwinnerUpgrade kernel-default-baseUpgrade kernel-defaultUpgrade kernel-docsUpgrade gfs2-kmp-defaultUpgrade cluster-md-kmp-64kbUpgrade dtb-xilinxUpgrade ocfs2-kmp-defaultUpgrade reiserfs-kmp-azureUpgrade dlm-kmp-azureUpgrade kernel-devel-rtUpgrade kernel-rt_debugUpgrade kernel-default-livepatch-develUpgrade dtb-amdUpgrade dtb-nvidiaUpgrade dtb-mediatekUpgrade dtb-renesasUpgrade reiserfs-kmp-rtUpgrade kernel-rt-vdsoUpgrade ocfs2-kmp-rtUpgrade kernel-azure-develUpgrade dtb-amlogicUpgrade reiserfs-kmp-64kbUpgrade kernel-azure-extraUpgrade dtb-freescaleUpgrade gfs2-kmp-rtUpgrade kernel-rt-livepatchUpgrade dtb-broadcomUpgrade dtb-exynosUpgrade dtb-appleUpgrade kernel-rt_debug-develUpgrade kernel-source-azureUpgrade dtb-marvellUpgrade ocfs2-kmp-64kbUpgrade kernel-debugUpgrade kernel-64kbUpgrade cluster-md-kmp-azureUpgrade kernel-debug-develUpgrade dtb-apmUpgrade gfs2-kmp-azureUpgrade cluster-md-kmp-rtUpgrade kernel-default-extraUpgrade kernel-64kb-optionalUpgrade dtb-alteraUpgrade kernel-syms-azureUpgrade dtb-caviumUpgrade cluster-md-kmp-defaultUpgrade kselftests-kmp-azureUpgrade kernel-default-livepatchUpgrade kernel-azure-optionalUpgrade kernel-symsUpgrade gfs2-kmp-64kbUpgrade kernel-obs-qaUpgrade kernel-develUpgrade dtb-qcomUpgrade kernel-kvmsmall-livepatch-develUpgrade kselftests-kmp-64kbUpgrade kernel-kvmsmall-develUpgrade kernel-docs-htmlUpgrade kernel-default-optionalUpgrade kernel-default-develUpgrade kernel-rt-optionalUpgrade kernel-azure-livepatch-develUpgrade kernel-kvmsmallUpgrade kernel-kvmsmall-vdsoUpgrade kernel-macrosUpgrade kernel-zfcpdumpUpgrade dtb-amazonUpgrade kernel-debug-livepatch-develUpgrade kernel-64kb-livepatch-develUpgrade dlm-kmp-64kbUpgrade kernel-source-rtUpgrade kernel-sourceUpgrade kernel-64kb-develUpgrade kernel-default-vdsoUpgrade dtb-lgUpgrade dtb-hisiliconUpgrade kernel-rtUpgrade kernel-devel-azure | Aug 9, 2024 | Mar 4, 2024 |
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