From 3623589edc7b1257bb45aa9e52c9631e133f22b6 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Wed, 27 Mar 2013 18:18:38 +0100 Subject: [PATCH] dfa: check for invalid access in decode_wdlt(). This can happen when the number of skipped lines is not consistent with the number of coded lines. Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org --- libavcodec/dfa.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c index bbe4ce2..6619b98 100644 --- a/libavcodec/dfa.c +++ b/libavcodec/dfa.c @@ -255,6 +255,8 @@ static int decode_wdlt(GetByteContext *gb, uint8_t *frame, int width, int height segments = bytestream2_get_le16(gb); } line_ptr = frame; + if (frame_end - frame < width) + return AVERROR_INVALIDDATA; frame += width; y++; while (segments--) { -- 2.7.4