Switch to memmove as input buffer can overlap (libvips#2476)

lovell · web-flow · commit b98366fcb1bf · 2021-10-12T17:24:40.000+01:00
diff --git a/libvips/foreign/jxlload.c b/libvips/foreign/jxlload.c
@@ -208,7 +208,7 @@ vips_foreign_load_jxl_fill_input( VipsForeignLoadJxl *jxl,
 		INPUT_BUFFER_SIZE - bytes_remaining );
 #endif /*DEBUG_VERBOSE*/
 
-	memcpy( jxl->input_buffer, 
+	memmove( jxl->input_buffer,
 		jxl->input_buffer + jxl->bytes_in_buffer - bytes_remaining,
 		bytes_remaining );
 	bytes_read = vips_source_read( jxl->source,
