From e30b068ef79f604ff439418da07f7e2efd01d4ea Mon Sep 17 00:00:00 2001 From: Luca Barbato Date: Fri, 28 Jun 2013 04:03:47 +0200 Subject: [PATCH] wmapro: make sure there is room to store the current packet Prevent horrid and hard to trace struct overwrite. Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org --- libavcodec/wmaprodec.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c index 6a64641..8fdfbf8 100644 --- a/libavcodec/wmaprodec.c +++ b/libavcodec/wmaprodec.c @@ -1459,6 +1459,14 @@ static void save_bits(WMAProDecodeCtx *s, GetBitContext* gb, int len, return; } + if (len > put_bits_left(&s->pb)) { + av_log(s->avctx, AV_LOG_ERROR, + "Cannot append %d bits, only %d bits available.\n", + len, put_bits_left(&s->pb)); + s->packet_loss = 1; + return; + } + s->num_saved_bits += len; if (!append) { avpriv_copy_bits(&s->pb, gb->buffer + (get_bits_count(gb) >> 3), -- 2.7.4