The latter code relies upon the dimensions to be not too small;
otherwise one will call av_clip() with min > max lateron which aborts
in case ASSERT_LEVEL is >= 2 or one will get a nonsense result that may
lead to a heap-buffer-overflow/underflow. The latter has happened in
ticket #8248 which this commit fixes.
Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@gmail.com>
---
libavfilter/vf_minterpolate.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavfilter/vf_minterpolate.c b/libavfilter/vf_minterpolate.c
index c9ce80420d..e1fe5e32b5 100644
--- a/libavfilter/vf_minterpolate.c
+++ b/libavfilter/vf_minterpolate.c
@@ -363,6 +363,11 @@ static int config_input(AVFilterLink *inlink)
}
if (mi_ctx->mi_mode == MI_MODE_MCI) {
+ if (mi_ctx->b_width < 2 || mi_ctx->b_height < 2) {
+ av_log(inlink->dst, AV_LOG_ERROR, "Height or width < %d\n",
+ 2 * mi_ctx->mb_size);
+ return AVERROR(EINVAL);
+ }
mi_ctx->pixel_mvs = av_mallocz_array(width * height, sizeof(PixelMVS));
mi_ctx->pixel_weights = av_mallocz_array(width * height,
sizeof(PixelWeights));
mi_ctx->pixel_refs = av_mallocz_array(width * height,
sizeof(PixelRefs));
--
2.25.1
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