From 2f6528537fdd88820f3a4683d5e595d7b3a62689 Mon Sep 17 00:00:00 2001 From: Alex Converse Date: Thu, 1 Mar 2012 14:07:22 -0800 Subject: rv10/20: Fix a buffer overread caused by losing track of the remaining buffer size. Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org --- libavcodec/rv10.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'libavcodec/rv10.c') diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c index 6e6516feeb..5dd08e9fef 100644 --- a/libavcodec/rv10.c +++ b/libavcodec/rv10.c @@ -642,8 +642,12 @@ static int rv10_decode_frame(AVCodecContext *avctx, if(!avctx->slice_count){ slice_count = (*buf++) + 1; + buf_size--; slices_hdr = buf + 4; buf += 8 * slice_count; + buf_size -= 8 * slice_count; + if (buf_size <= 0) + return AVERROR_INVALIDDATA; }else slice_count = avctx->slice_count; @@ -689,7 +693,7 @@ static int rv10_decode_frame(AVCodecContext *avctx, s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...) } - return buf_size; + return avpkt->size; } AVCodec ff_rv10_decoder = { -- cgit v1.2.3