From e1ba29c76430ce511fd901c8b7a1bd199b169dc0 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 14 Dec 2011 22:20:39 +0100 Subject: [PATCH] 4xm: check if there are bits left in decode_i_block() Fixed Ticket753 Bug Found by: Diana Elena Muscalu Signed-off-by: Michael Niedermayer --- libavcodec/4xm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c index 9350f06e9b..f854f1cfb5 100644 --- a/libavcodec/4xm.c +++ b/libavcodec/4xm.c @@ -459,6 +459,11 @@ static int decode_p_frame(FourXContext *f, const uint8_t *buf, int length){ static int decode_i_block(FourXContext *f, DCTELEM *block){ int code, i, j, level, val; + if(get_bits_left(&f->gb) < 2){ + av_log(f->avctx, AV_LOG_ERROR, "%d bits left before decode_i_block()\n", get_bits_left(&f->gb)); + return -1; + } + /* DC coef */ val = get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3); if (val>>4){ -- 2.11.0