We assume that if the compressed size is bigger than if each byte is encoded in a single raw packet that the data is invalid.
Fixes: Out of memory Fixes: 12208/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RASC_fuzzer-5648916473708544 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/rasc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/rasc.c b/libavcodec/rasc.c index 1b607ac31e..6e32c1540e 100644 --- a/libavcodec/rasc.c +++ b/libavcodec/rasc.c @@ -353,6 +353,8 @@ static int decode_dlta(AVCodecContext *avctx, compression = bytestream2_get_le32(gb); if (compression == 1) { + if (w * h * s->bpp * 3 < uncompressed_size) + return AVERROR_INVALIDDATA; ret = decode_zlib(avctx, avpkt, size, uncompressed_size); if (ret < 0) return ret; -- 2.20.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
