From: Martin Storsjö Date: Mon, 16 Sep 2013 18:46:50 +0000 (+0300) Subject: ffv1: Make sure at least one slice context is initialized X-Git-Tag: n2.1~57^2~260 X-Git-Url: https://git.videolan.org/?p=ffmpeg.git;a=commitdiff_plain;h=b1db33159fdc2da4bdd8c75e4ff9a7dd0ef2f0c2 ffv1: Make sure at least one slice context is initialized This avoids crashes when initializing the range coder for the first slice context. Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org Signed-off-by: Martin Storsjö --- diff --git a/libavcodec/ffv1.c b/libavcodec/ffv1.c index 378b55b236..a31f2786ee 100644 --- a/libavcodec/ffv1.c +++ b/libavcodec/ffv1.c @@ -194,6 +194,10 @@ av_cold int ffv1_init_slice_contexts(FFV1Context *f) int i; f->slice_count = f->num_h_slices * f->num_v_slices; + if (f->slice_count <= 0) { + av_log(f->avctx, AV_LOG_ERROR, "Invalid number of slices\n"); + return AVERROR(EINVAL); + } for (i = 0; i < f->slice_count; i++) { FFV1Context *fs = av_mallocz(sizeof(*fs));