Module: libav Branch: release/9 Commit: 937cedd7c0ca98d183ceaf650f0dad1aab1b75a5
Author: Luca Barbato <lu_z...@gentoo.org> Committer: Luca Barbato <lu_z...@gentoo.org> Date: Mon Aug 5 06:27:12 2013 +0200 vc1: check the source buffer in vc1_mc functions Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-sta...@libav.org (cherry picked from commit 090cd0631140ac1a3a795d2adfac5dbf5e381aa2) Signed-off-by: Luca Barbato <lu_z...@gentoo.org> Conflicts: libavcodec/vc1dec.c --- libavcodec/vc1dec.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c index c29f91c..e24a153 100644 --- a/libavcodec/vc1dec.c +++ b/libavcodec/vc1dec.c @@ -394,6 +394,11 @@ static void vc1_mc_1mv(VC1Context *v, int dir) } } + if (!srcY || !srcU) { + av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n"); + return; + } + src_x = s->mb_x * 16 + (mx >> 2); src_y = s->mb_y * 16 + (my >> 2); uvsrc_x = s->mb_x * 8 + (uvmx >> 2); @@ -569,6 +574,11 @@ static void vc1_mc_4mv_luma(VC1Context *v, int n, int dir) } else srcY = s->next_picture.f.data[0]; + if (!srcY) { + av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n"); + return; + } + if (v->field_mode) { if (v->cur_field_type != v->ref_field_type[dir]) my = my - 2 + 4 * v->cur_field_type; @@ -856,6 +866,11 @@ static void vc1_mc_4mv_chroma(VC1Context *v, int dir) srcV = s->next_picture.f.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x; } + if (!srcU) { + av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n"); + return; + } + if (v->field_mode) { if (chroma_ref_type) { srcU += s->current_picture_ptr->f.linesize[1]; _______________________________________________ libav-commits mailing list libav-commits@libav.org https://lists.libav.org/mailman/listinfo/libav-commits