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avcodec/anm: Check input size for a frame with just a stop code

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Fixes: Timeout (11sec -> 6sec)
Fixes: 16344/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ANM_fuzzer-5673032000995328

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 1965161ef6d2aac8d3b034570c3da69dabca9e71)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-08-15 21:00:54 +02:00
parent e32ef596a9
commit 1b0aac8f42
1 changed files with 3 additions and 0 deletions
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3
libavcodec/anm.c
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@ -119,6 +119,9 @@ static int decode_frame(AVCodecContext *avctx,
uint8_t *dst, *dst_end;
int count, ret;
if (buf_size < 7)
return AVERROR_INVALIDDATA;
if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
return ret;
dst = s->frame->data[0];