From 68a4d3498f28eff3508595283074e1ed8493879d Mon Sep 17 00:00:00 2001 From: Laurent Aimar Date: Thu, 28 Jan 2010 23:49:46 +0000 Subject: vp56: check buffer size to fix a potential segfault patch by Laurent Aimar fenrir _at_ videolan _dot_ org Originally committed as revision 21521 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/vp56.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'libavcodec/vp56.c') diff --git a/libavcodec/vp56.c b/libavcodec/vp56.c index cbac71bc93..36027b43f1 100644 --- a/libavcodec/vp56.c +++ b/libavcodec/vp56.c @@ -504,8 +504,12 @@ int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size, int is_alpha, av_uninit(alpha_offset); if (s->has_alpha) { + if (remaining_buf_size < 3) + return -1; alpha_offset = bytestream_get_be24(&buf); remaining_buf_size -= 3; + if (remaining_buf_size < alpha_offset) + return -1; } for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) { -- cgit v1.2.3