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Fix signed integer overflows.

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Change-Id: I62c9949f0edac58d69d991d6be5f85ae9e4d62a9
This commit is contained in:
Vincent Rabaud
2017-08-31 11:56:28 +02:00
parent f66f94ef36
commit 3993af127e
4 changed files with 16 additions and 9 deletions
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6
src/utils/rescaler_utils.c
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@ -85,11 +85,13 @@ int WebPRescalerGetScaledDimensions(int src_width, int src_height,
// if width is unspecified, scale original proportionally to height ratio.
if (width == 0) {
width = (src_width * height + src_height / 2) / src_height;
width =
(int)(((uint64_t)src_width * height + src_height / 2) / src_height);
}
// if height is unspecified, scale original proportionally to width ratio.
if (height == 0) {
height = (src_height * width + src_width / 2) / src_width;
height =
(int)(((uint64_t)src_height * width + src_width / 2) / src_width);
}
// Check if the overall dimensions still make sense.
if (width <= 0 || height <= 0) {