From f7c67536fe56336b9c6dcbc87162394c7feb18a5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 22 Apr 2012 11:10:17 +0200 Subject: [PATCH] svq1dec: Fix overread on very small input Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer --- libavcodec/svq1dec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/svq1dec.c b/libavcodec/svq1dec.c index e03df08c2d..c36f9fe435 100644 --- a/libavcodec/svq1dec.c +++ b/libavcodec/svq1dec.c @@ -647,6 +647,9 @@ static int svq1_decode_frame(AVCodecContext *avctx, if (s->f_code != 0x20) { uint32_t *src = (uint32_t *) (buf + 4); + if (buf_size < 36) + return AVERROR_INVALIDDATA; + for (i=0; i < 4; i++) { src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i]; }