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avcodec/rscc: Skip empty frames (nb_tiles == 0)

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Fixes: Timeout
Fixes: 6266/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RSCC_fuzzer-5692431816196096

Its not known if nb_tiles is allowed so it is not treated as an error

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 2018-02-26 02:15:34 +01:00
parent fa0c9d69d3
commit bbed942dfd
1 changed files with 6 additions and 0 deletions
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6
libavcodec/rscc.c
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@ -157,6 +157,12 @@ static int rscc_decode_frame(AVCodecContext *avctx, void *data,
/* Read number of tiles, and allocate the array */
tiles_nb = bytestream2_get_le16(gbc);
if (tiles_nb == 0) {
av_log(avctx, AV_LOG_DEBUG, "no tiles\n");
return avpkt->size;
}
av_fast_malloc(&ctx->tiles, &ctx->tiles_size,
tiles_nb * sizeof(*ctx->tiles));
if (!ctx->tiles) {