From 5569146d48f06564e8fa393424782cceed510916 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Thu, 28 Nov 2013 10:54:35 +0100 Subject: [PATCH] adx: check that the offset is not negative Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC:libav-stable@libav.org --- libavcodec/adx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/adx.c b/libavcodec/adx.c index 63358650ed..a9cf4ffd09 100644 --- a/libavcodec/adx.c +++ b/libavcodec/adx.c @@ -48,7 +48,7 @@ int avpriv_adx_decode_header(AVCodecContext *avctx, const uint8_t *buf, offset = AV_RB16(buf + 2) + 4; /* if copyright string is within the provided data, validate it */ - if (bufsize >= offset && memcmp(buf + offset - 6, "(c)CRI", 6)) + if (bufsize >= offset && offset >= 6 && memcmp(buf + offset - 6, "(c)CRI", 6)) return AVERROR_INVALIDDATA; /* check for encoding=3 block_size=18, sample_size=4 */