From b90e795f737c5efb9f65869b304e87a0985b046d Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 1 Dec 2012 00:29:39 +0100 Subject: [PATCH] check std tag size before reading. Fixes out of array read Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer --- libavformat/4xm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavformat/4xm.c b/libavformat/4xm.c index 0a003d4b8e..1e142f550f 100644 --- a/libavformat/4xm.c +++ b/libavformat/4xm.c @@ -134,6 +134,10 @@ static int fourxm_read_header(AVFormatContext *s) } if (fourcc_tag == std__TAG) { + if (header_size < i + 16) { + av_log(s, AV_LOG_ERROR, "std TAG truncated\n"); + return AVERROR_INVALIDDATA; + } fourxm->fps = av_int2float(AV_RL32(&header[i + 12])); } else if (fourcc_tag == vtrk_TAG) { /* check that there is enough data */