Prevent horrid and hard to trace struct overwrite.
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-sta...@libav.org
---
libavcodec/wmaprodec.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
index 6a64641..0712fb7 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, %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),
--
1.8.2.1
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