For even small values of 'asrc[x]', shifting them by 24 bits or more
will cause arithmetic overflow and be caught by
GCC's undefined behaviour sanitizer.
Ensure the values do not overflow by up-casting the bracketed
expressions involving 'asrc' to uint32_t.
---
libswscale/yuv2rgb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libswscale/yuv2rgb.c b/libswscale/yuv2rgb.c
index 977eb3a7dd..cfbc54abd0 100644
--- a/libswscale/yuv2rgb.c
+++ b/libswscale/yuv2rgb.c
@@ -100,9 +100,9 @@ const int *sws_getCoefficients(int colorspace)
#define PUTRGBA(dst, ysrc, asrc, i, abase) \
Y = ysrc[2 * i]; \
- dst[2 * i] = r[Y] + g[Y] + b[Y] + (asrc[2 * i] << abase); \
+ dst[2 * i] = r[Y] + g[Y] + b[Y] + ((uint32_t)(asrc[2 * i]) <<
abase); \
Y = ysrc[2 * i + 1]; \
- dst[2 * i + 1] = r[Y] + g[Y] + b[Y] + (asrc[2 * i + 1] << abase);
+ dst[2 * i + 1] = r[Y] + g[Y] + b[Y] + ((uint32_t)(asrc[2 * i + 1]) <<
abase);
#define PUTRGB48(dst, src, asrc, i, abase) \
Y = src[ 2 * i]; \
--
2.39.2
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