From 5f835efbca874ad42cb954e6788588f52a57a7a2 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 14 Sep 2021 20:31:39 +0200 Subject: [PATCH] avcodec/flicvideo: Check remaining bytes in FLI*COPY Fixes: Timeout Fixes: 37795/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FLIC_fuzzer-4846536543043584 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/flicvideo.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c index 47ca77f62e..e122fe231f 100644 --- a/libavcodec/flicvideo.c +++ b/libavcodec/flicvideo.c @@ -735,6 +735,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, bytestream2_skip(&g2, chunk_size - 6); } else { + if (bytestream2_get_bytes_left(&g2) < 2 * s->avctx->width * s->avctx->height ) + return AVERROR_INVALIDDATA; for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height; y_ptr += s->frame->linesize[0]) {