CVE-2024-42088

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ASoC: mediatek: mt8195: Add platform entry for ETDM1_OUT_BE dai link<br /> <br /> Commit e70b8dd26711 ("ASoC: mediatek: mt8195: Remove afe-dai component<br /> and rework codec link") removed the codec entry for the ETDM1_OUT_BE<br /> dai link entirely instead of replacing it with COMP_EMPTY(). This worked<br /> by accident as the remaining COMP_EMPTY() platform entry became the codec<br /> entry, and the platform entry became completely empty, effectively the<br /> same as COMP_DUMMY() since snd_soc_fill_dummy_dai() doesn&amp;#39;t do anything<br /> for platform entries.<br /> <br /> This causes a KASAN out-of-bounds warning in mtk_soundcard_common_probe()<br /> in sound/soc/mediatek/common/mtk-soundcard-driver.c:<br /> <br /> for_each_card_prelinks(card, i, dai_link) {<br /> if (adsp_node &amp;&amp; !strncmp(dai_link-&gt;name, "AFE_SOF", strlen("AFE_SOF")))<br /> dai_link-&gt;platforms-&gt;of_node = adsp_node;<br /> else if (!dai_link-&gt;platforms-&gt;name &amp;&amp; !dai_link-&gt;platforms-&gt;of_node)<br /> dai_link-&gt;platforms-&gt;of_node = platform_node;<br /> }<br /> <br /> where the code expects the platforms array to have space for at least one entry.<br /> <br /> Add an COMP_EMPTY() entry so that dai_link-&gt;platforms has space.