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| author | Yiyuan GUO <yguoaz@gmail.com> | 2021-05-15 13:54:35 +0800 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2022-03-14 17:55:00 +0100 |
| commit | 2201c91fbf672447aa2063bd752d821466b8f11b (patch) | |
| tree | e907f5b89a97ad8f87cb3d8bfd5287ff3504ddb2 /libavfilter | |
| parent | 910a24eb330694a24da20efd03706a7a6052bb77 (diff) | |
| download | ffmpeg-2201c91fbf672447aa2063bd752d821466b8f11b.tar.gz | |
avfilter/vf_palettegen: add protection against potential divide by zero
In libavfilter/vf_palettegen.c, the function get_avg_color requires
that box->len greater than zero to avoid dividing by zero. However,
the call sequence filter_frame -> get_palette_frame -> get_avg_color
may not satisfy this precondition. Fixes #9222.
Signed-off-by: Yiyuan GUO <yguoaz@gmail.com>
Diffstat (limited to 'libavfilter')
| -rw-r--r-- | libavfilter/vf_palettegen.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavfilter/vf_palettegen.c b/libavfilter/vf_palettegen.c index 4f53aa1aad..27f74fd147 100644 --- a/libavfilter/vf_palettegen.c +++ b/libavfilter/vf_palettegen.c @@ -528,7 +528,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in) if (s->stats_mode == STATS_MODE_DIFF_FRAMES) { av_frame_free(&s->prev_frame); s->prev_frame = in; - } else if (s->stats_mode == STATS_MODE_SINGLE_FRAMES) { + } else if (s->stats_mode == STATS_MODE_SINGLE_FRAMES && s->nb_refs > 0) { AVFrame *out; int i; |