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avutil/hwcontext_cuda: copy only the bytes of the visible rows

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Fixes: out of array access
Fixes: ZqshmgSdN2Q2
Found during triage of the review of https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24595
Out of array read and write Replicated through API with ASAN
Out of array read Replicated through UnModified FFmpeg with a guard page allocator
This commit is contained in:
Michael Niedermayer
2026-10-12 02:48:35 +02:00
committed by michaelni
parent 341553de8a
commit f07f02abb8
1 changed files with 7 additions and 1 deletions
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8
libavutil/hwcontext_cuda.c
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@@ -567,10 +567,16 @@ static int cuda_transfer_data(AVHWFramesContext *ctx, AVFrame *dst,
int src_is_nonplanar_cuarray = 0;
int dst_is_nonplanar_cuarray = 0;
int bytewidth = av_image_get_linesize(ctx->sw_format, src->width, i);
if (bytewidth < 0) {
ret = bytewidth;
goto fail;
}
CUDA_MEMCPY2D cpy = {
.srcPitch = src->linesize[i],
.dstPitch = dst->linesize[i],
.WidthInBytes = FFMIN(src->linesize[i], dst->linesize[i]),
.WidthInBytes = bytewidth,
.Height = AV_CEIL_RSHIFT(src->height, ((i == 0 || i == 3) ? 0 : priv->shift_height)),
};