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avfilter/vf_bm3d: fix heap-buffer overflows 

Fixes #8262

(cherry picked from commit 0749082eb9)
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Paul B Mahol 2019-10-13 18:10:38 +02:00 committed by James Almer
parent f1fc3fe317
commit 8c9ff740a3
1 changed files with 4 additions and 4 deletions
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8
libavfilter/vf_bm3d.c
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@ -706,8 +706,8 @@ static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
const int plane = td->plane;
const int width = s->planewidth[plane];
const int height = s->planeheight[plane];
const int block_pos_bottom = height - s->block_size;
const int block_pos_right = width - s->block_size;
const int block_pos_bottom = FFMAX(0, height - s->block_size);
const int block_pos_right = FFMAX(0, width - s->block_size);
const int slice_start = (((height + block_step - 1) / block_step) * jobnr / nb_jobs) * block_step;
const int slice_end = (jobnr == nb_jobs - 1) ? block_pos_bottom + block_step :
(((height + block_step - 1) / block_step) * (jobnr + 1) / nb_jobs) * block_step;
@ -796,8 +796,8 @@ static int config_input(AVFilterLink *inlink)
for (i = 0; i < s->nb_threads; i++) {
SliceContext *sc = &s->slices[i];
sc->num = av_calloc(s->planewidth[0] * s->planeheight[0], sizeof(FFTSample));
sc->den = av_calloc(s->planewidth[0] * s->planeheight[0], sizeof(FFTSample));
sc->num = av_calloc(FFALIGN(s->planewidth[0], s->block_size) * FFALIGN(s->planeheight[0], s->block_size), sizeof(FFTSample));
sc->den = av_calloc(FFALIGN(s->planewidth[0], s->block_size) * FFALIGN(s->planeheight[0], s->block_size), sizeof(FFTSample));
if (!sc->num || !sc->den)
return AVERROR(ENOMEM);