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avfilter/vf_fieldmatch: fix heap-buffer overflow 

Also fix use of uninitialized values.

Fixes #8239
This commit is contained in:
Paul B Mahol 2019-10-19 11:56:02 +02:00
parent c8f3915f8d
commit ce5274c138
1 changed files with 1 additions and 1 deletions
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2
libavfilter/vf_fieldmatch.c
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@ -950,7 +950,7 @@ static int config_input(AVFilterLink *inlink)
fm->tpitchy = FFALIGN(w, 16);
fm->tpitchuv = FFALIGN(w >> 1, 16);
fm->tbuffer = av_malloc(h/2 * fm->tpitchy);
fm->tbuffer = av_calloc((h/2 + 4) * fm->tpitchy, sizeof(*fm->tbuffer));
fm->c_array = av_malloc((((w + fm->blockx/2)/fm->blockx)+1) *
(((h + fm->blocky/2)/fm->blocky)+1) *
4 * sizeof(*fm->c_array));