rescaler_utils: set max valid scaled w/h to INT_MAX/2
this will avoid the potential for some integer overflows in rescaler
calculations
// Author: Skal (pascal.massimino@gmail.com)
#include <assert.h>
+#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include "src/dsp/dsp.h"
@@ -83,6 +84,7 @@ int WebPRescalerGetScaledDimensions(int src_width, int src_height,
{
int width = *scaled_width;
int height = *scaled_height;
+ const int max_size = INT_MAX / 2;
// if width is unspecified, scale original proportionally to height ratio.
if (width == 0 && src_height > 0) {
@@ -95,7 +97,7 @@ int WebPRescalerGetScaledDimensions(int src_width, int src_height,
(int)(((uint64_t)src_height * width + src_width - 1) / src_width);
}
// Check if the overall dimensions still make sense.
- if (width <= 0 || height <= 0) {
+ if (width <= 0 || height <= 0 || width > max_size || height > max_size) {
return 0;
}
