From 2bc3811c0d6b34e43a55a7541722761f548628d0 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 1 Dec 2018 21:41:01 +0100 Subject: [PATCH] avcodec/dxv: Check that there is enough data to decompress Fixes: Timeout Fixes: 10979/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DXV_fuzzer-6178582203203584 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/dxv.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libavcodec/dxv.c b/libavcodec/dxv.c index 08aca73b1f..bf53d7d706 100644 --- a/libavcodec/dxv.c +++ b/libavcodec/dxv.c @@ -1192,6 +1192,12 @@ static int dxv_decode(AVCodecContext *avctx, void *data, ret = decompress_tex(avctx); if (ret < 0) return ret; + { + int w_block = avctx->coded_width / ctx->texture_block_w; + int h_block = avctx->coded_height / ctx->texture_block_h; + if (w_block * h_block * ctx->tex_step > ctx->tex_size * 8LL) + return AVERROR_INVALIDDATA; + } tframe.f = data; ret = ff_thread_get_buffer(avctx, &tframe, 0); -- GitLab