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avcodec/dfa: Fix off by 1 error

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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 <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-05 20:42:11 +02:00
parent 0953736b7e
commit f52fbf4f3e
1 changed files with 1 additions and 1 deletions
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2
libavcodec/dfa.c
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@ -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);