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authorAurelien Jacobs <aurel@gnuage.org>2008-10-13 00:10:53 +0000
committerAurelien Jacobs <aurel@gnuage.org>2008-10-13 00:10:53 +0000
commit40056c32df9fb6db2774dcc0d4f87cbfd759058e (patch)
tree9fa08644447877371c497f60852a210c4504ed98 /libavcodec
parentf2e49553de52d694f9207c877e85f95dfe7bb4e7 (diff)
downloadffmpeg-40056c32df9fb6db2774dcc0d4f87cbfd759058e.tar.gz
vp6dec: ensure we don't try to use a buffer with negative size
this should never happen in valid vp6 bitstream fix issue684 Originally committed as revision 15610 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
-rw-r--r--libavcodec/vp6.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c
index c1cd6fe64b..bea7c9ed02 100644
--- a/libavcodec/vp6.c
+++ b/libavcodec/vp6.c
@@ -135,6 +135,8 @@ static int vp6_parse_header(vp56_context_t *s, const uint8_t *buf, int buf_size,
if (coeff_offset) {
buf += coeff_offset;
buf_size -= coeff_offset;
+ if (buf_size < 0)
+ return 0;
if (s->use_huffman) {
s->parse_coeff = vp6_parse_coeff_huffman;
init_get_bits(&s->gb, buf, buf_size<<3);