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avcodec/gdv: Check available space before reading palette

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Fixes: Timeout
Fixes: 2926/clusterfuzz-testcase-498711001458278

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-08-11 19:27:02 +02:00
parent 62702eebde
commit 0561bd2fc2
1 changed files with 2 additions and 0 deletions
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2
libavcodec/gdv.c
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@ -427,6 +427,8 @@ static int gdv_decode_frame(AVCodecContext *avctx, void *data,
case 1:
memset(gdv->frame + PREAMBLE_SIZE, 0, gdv->frame_size - PREAMBLE_SIZE);
case 0:
if (bytestream2_get_bytes_left(gb) < 256*3)
return AVERROR_INVALIDDATA;
for (i = 0; i < 256; i++) {
unsigned r = bytestream2_get_byte(gb);
unsigned g = bytestream2_get_byte(gb);