From c9837954e7b968d44f82e7cdb7618e9f523b196c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 10 Mar 2012 00:08:32 +0100 Subject: snow: reject unsupported chroma shifts. Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org Signed-off-by: Ronald S. Bultje --- libavcodec/snowdec.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'libavcodec') diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c index 1dccc638d8..58a80b39c6 100644 --- a/libavcodec/snowdec.c +++ b/libavcodec/snowdec.c @@ -327,6 +327,11 @@ static int decode_header(SnowContext *s){ return -1; } + if (s->chroma_h_shift != 1 || s->chroma_v_shift != 1) { + av_log(s->avctx, AV_LOG_ERROR, "Invalid chroma shift\n"); + return AVERROR_PATCHWELCOME; + } + s->qlog += get_symbol(&s->c, s->header_state, 1); s->mv_scale += get_symbol(&s->c, s->header_state, 1); s->qbias += get_symbol(&s->c, s->header_state, 1); -- cgit v1.2.3