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avcodec/rasc: Check input space before reading chunk

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Fixes: Timeout
Fixes: 11118/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RASC_fuzzer-5652564066959360

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 2018-12-05 02:18:51 +01:00
parent 6bfc935232
commit 52ba824c65
1 changed files with 3 additions and 0 deletions
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3
libavcodec/rasc.c
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@ -680,6 +680,9 @@ static int decode_frame(AVCodecContext *avctx,
while (bytestream2_get_bytes_left(gb) > 0) {
unsigned type, size = 0;
if (bytestream2_get_bytes_left(gb) < 8)
return AVERROR_INVALIDDATA;
type = bytestream2_get_le32(gb);
if (type == KBND || type == BNDL) {
intra = type == KBND;