CVE-2023-53784

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm: bridge: dw_hdmi: fix connector access for scdc<br /> <br /> Commit 5d844091f237 ("drm/scdc-helper: Pimp SCDC debugs") changed the scdc<br /> interface to pick up an i2c adapter from a connector instead. However, in<br /> the case of dw-hdmi, the wrong connector was being used to pass i2c adapter<br /> information, since dw-hdmi&amp;#39;s embedded connector structure is only populated<br /> when the bridge attachment callback explicitly asks for it.<br /> <br /> drm-meson is handling connector creation, so this won&amp;#39;t happen, leading to<br /> a NULL pointer dereference.<br /> <br /> Fix it by having scdc functions access dw-hdmi&amp;#39;s current connector pointer<br /> instead, which is assigned during the bridge enablement stage.<br /> <br /> [narmstrong: moved Fixes tag before first S-o-b and added Reported-by tag]