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CVE-2023-51793

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Signed-off-by: ziyugao <gaoziyu0614@outlook.com>
This commit is contained in:
ziyugao 2024-05-23 02:42:53 +00:00
parent 0bb69b4677
commit 1b63cf5253
1 changed files with 7 additions and 2 deletions
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9
libavfilter/vf_weave.c
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@ -30,6 +30,7 @@ typedef struct WeaveContext {
int double_weave;
int nb_planes;
int planeheight[4];
int outheight[4];
int linesize[4];
AVFrame *prev;
@ -79,6 +80,9 @@ static int config_props_output(AVFilterLink *outlink)
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->outheight[1] = s->outheight[2] = AV_CEIL_RSHIFT(2*inlink->h, desc->log2_chroma_h);
s->outheight[0] = s->outheight[3] = 2*inlink->h;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
return 0;
@ -104,19 +108,20 @@ static int weave_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
const int height = s->planeheight[i];
const int start = (height * jobnr) / nb_jobs;
const int end = (height * (jobnr+1)) / nb_jobs;
const int compensation = 2*end > s->outheight[i];
av_image_copy_plane(out->data[i] + out->linesize[i] * field1 +
out->linesize[i] * start * 2,
out->linesize[i] * 2,
in->data[i] + start * in->linesize[i],
in->linesize[i],
s->linesize[i], end - start);
s->linesize[i], end - start - compensation * field1);
av_image_copy_plane(out->data[i] + out->linesize[i] * field2 +
out->linesize[i] * start * 2,
out->linesize[i] * 2,
s->prev->data[i] + start * s->prev->linesize[i],
s->prev->linesize[i],
s->linesize[i], end - start);
s->linesize[i], end - start - compensation * field1);
}
return 0;