From: Michael Niedermayer Date: Fri, 5 May 2017 18:42:11 +0000 (+0200) Subject: avcodec/dfa: Fix off by 1 error X-Git-Tag: n3.4~1745 X-Git-Url: http://git.videolan.org/?p=ffmpeg.git;a=commitdiff_plain;h=f52fbf4f3ed02a7d872d8a102006f29b4421f360 avcodec/dfa: Fix off by 1 error Fixes out of array access Fixes: 1345/clusterfuzz-testcase-minimized-6062963045695488 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c index f45d019a79..5ddb647c4c 100644 --- a/libavcodec/dfa.c +++ b/libavcodec/dfa.c @@ -175,7 +175,7 @@ static int decode_dds1(GetByteContext *gb, uint8_t *frame, int width, int height return AVERROR_INVALIDDATA; frame += v; } else { - if (frame_end - frame < width + 3) + if (frame_end - frame < width + 4) return AVERROR_INVALIDDATA; frame[0] = frame[1] = frame[width] = frame[width + 1] = bytestream2_get_byte(gb);