In the Linux kernel, the following vulnerability has been resolved: drm/stm: ltdc: fix late dereference check In ltdccrtcsetcrcsource(), struct drmcrtc was dereferenced in a containerof() before the pointer check. This could cause a kernel panic. Fix this smatch warning: drivers/gpu/drm/stm/ltdc.c:1124 ltdccrtcsetcrcsource() warn: variable dereferenced before check 'crtc' (see line 1119)