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avcodec/qdrw: Check input for header/skiped space before get_buffer()

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Fixes: Timeout (21sec -> 0.8sec)
Fixes: 17990/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDRAW_fuzzer-5200374436200448

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b63fbc19c09d0b42da4f83c21fcf362d6ed7c545)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-10-07 16:14:32 +02:00
parent 385e715138
commit 7358e165c6
1 changed files with 2 additions and 0 deletions
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2
libavcodec/qdrw.c
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@ -455,6 +455,8 @@ static int decode_frame(AVCodecContext *avctx,
avpriv_request_sample(avctx, "Pack type %d", pack_type);
return AVERROR_PATCHWELCOME;
}
if (bytestream2_get_bytes_left(&gbc) < 30)
return AVERROR_INVALIDDATA;
if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
return ret;