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commit ad84fc9b7df2910ea38f91b4a84872c52e006390 Author: Michael Niedermayer <[email protected]> AuthorDate: Sun May 31 01:04:59 2026 +0200 Commit: michaelni <[email protected]> CommitDate: Fri Jun 5 01:15:22 2026 +0000 swscale/output: avoid signed overflow in yuv2rgba64_full_1 alpha Fixes: 493055112/clusterfuzz-testcase-minimized-ffmpeg_SWS_fuzzer-5823995319746560 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> --- libswscale/output.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/libswscale/output.c b/libswscale/output.c index 396380ac72..003bff63a1 100644 --- a/libswscale/output.c +++ b/libswscale/output.c @@ -1499,7 +1499,7 @@ yuv2rgba64_full_1_c_template(SwsInternal *c, const int32_t *buf0, { const int32_t *ubuf0 = ubuf[0], *vbuf0 = vbuf[0]; int i; - int A = 0xffff<<14; + SUINT A = 0xffff<<14; if (uvalpha == 0) { for (i = 0; i < dstW; i++) { @@ -1513,7 +1513,7 @@ yuv2rgba64_full_1_c_template(SwsInternal *c, const int32_t *buf0, Y += (1 << 13) - (1 << 29); if (hasAlpha) { - A = abuf0[i] * (1 << 11); + A = abuf0[i] * (SUINT)(1 << 11); A += 1 << 13; } @@ -1535,7 +1535,7 @@ yuv2rgba64_full_1_c_template(SwsInternal *c, const int32_t *buf0, } else { const int32_t *ubuf1 = ubuf[1], *vbuf1 = vbuf[1]; unsigned uvalpha1 = 4096 - uvalpha; - int A = 0xffff<<14; + SUINT A = 0xffff<<14; av_assert2(uvalpha <= 4096U); for (i = 0; i < dstW; i++) { @@ -1549,7 +1549,7 @@ yuv2rgba64_full_1_c_template(SwsInternal *c, const int32_t *buf0, Y += (1 << 13) - (1 << 29); if (hasAlpha) { - A = abuf0[i] * (1 << 11); + A = abuf0[i] * (SUINT)(1 << 11); A += 1 << 13; } _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
