From b61ba262a1e275f8129b7383d70fe48051b47fcf Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 2 Dec 2012 04:21:42 +0100 Subject: [PATCH] mpc8: check seektable size before attempting to use it. Fixes null pointer dereference Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer --- libavformat/mpc8.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c index 56ed7ade13..191f6963de 100644 --- a/libavformat/mpc8.c +++ b/libavformat/mpc8.c @@ -145,6 +145,10 @@ static void mpc8_parse_seektable(AVFormatContext *s, int64_t off) av_log(s, AV_LOG_ERROR, "No seek table at given position\n"); return; } + if (size > INT_MAX/10 || size<=0) { + av_log(s, AV_LOG_ERROR, "Seek table size is invalid\n"); + return; + } if(!(buf = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE))) return; avio_read(s->pb, buf, size);