CVE-2022-49506 — drm/mediatek: Add vblank register/unregister callback functions
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Add vblank register/unregister callback functions We encountered a kernel panic issue that ca…
Published: 2025-02-26 · CVSS: Unscored
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Add vblank register/unregister callback functions We encountered a kernel panic issue that callback data will be NULL when it's using in ovl irq handler. There is a timing issue between mtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank(). To resolve this issue, we use the flow to register/unregister vblank cb: - Register callback function and callback data when crtc creates. - Unregister callback function and callback data when crtc destroies. With this solution, we can assure callback data will not be NULL when vblank is disable.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7