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swscale/rgb2rgb_template: fix signed shift into sign bit

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Fixes: left shift of 255 by 24 places cannot be represented in type 'int'
Fixes: 471591904/clusterfuzz-testcase-minimized-ffmpeg_SWS_fuzzer-5141341165387776

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2026-02-13 23:40:38 +01:00
committed by michaelni
parent 0e3ac1f4f9
commit 3ec03b847b
1 changed files with 2 additions and 2 deletions
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libswscale/rgb2rgb_template.c
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@@ -470,11 +470,11 @@ static inline void yuvPlanartouyvy_c(const uint8_t *ysrc, const uint8_t *usrc,
for (i = 0; i < chromWidth; i++) {
#if HAVE_BIGENDIAN
*idst++ = (uc[0] << 24) + (yc[0] << 16) +
*idst++ = ((unsigned)uc[0] << 24) + (yc[0] << 16) +
(vc[0] << 8) + (yc[1] << 0);
#else
*idst++ = uc[0] + (yc[0] << 8) +
(vc[0] << 16) + (yc[1] << 24);
(vc[0] << 16) + ((unsigned)yc[1] << 24);
#endif
yc += 2;
uc++;