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avfilter/vf_swaprect: round coordinates down

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Fixes: out of array access:
Fixes: tickets/10745/poc12ffmpeg

Found-by: Li Zeyuan and Zeng Yunxiang.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-12-22 22:27:08 +01:00
parent 9f4c5bd7d2
commit 7deaca71b3
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GPG key ID: B18E8928B3948D64
1 changed files with 4 additions and 4 deletions
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8
libavfilter/vf_swaprect.c
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@ -173,14 +173,14 @@ FF_ENABLE_DEPRECATION_WARNINGS
lw[1] = lw[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
lw[0] = lw[3] = inlink->w;
x1[1] = x1[2] = AV_CEIL_RSHIFT(x1[0], s->desc->log2_chroma_w);
x1[1] = x1[2] = (x1[0] >> s->desc->log2_chroma_w);
x1[0] = x1[3] = x1[0];
y1[1] = y1[2] = AV_CEIL_RSHIFT(y1[0], s->desc->log2_chroma_h);
y1[1] = y1[2] = (y1[0] >> s->desc->log2_chroma_h);
y1[0] = y1[3] = y1[0];
x2[1] = x2[2] = AV_CEIL_RSHIFT(x2[0], s->desc->log2_chroma_w);
x2[1] = x2[2] = (x2[0] >> s->desc->log2_chroma_w);
x2[0] = x2[3] = x2[0];
y2[1] = y2[2] = AV_CEIL_RSHIFT(y2[0], s->desc->log2_chroma_h);
y2[1] = y2[2] = (y2[0] >> s->desc->log2_chroma_h);
y2[0] = y2[3] = y2[0];