Fixes: Timeout Fixes: 6292/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VP3_fuzzer-4871218218926080
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/vp3.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c index 1d83753314..fcc19a627b 100644 --- a/libavcodec/vp3.c +++ b/libavcodec/vp3.c @@ -543,7 +543,11 @@ static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb) : s->y_superblock_count); int num_coded_frags = 0; - for (i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) { + for (i = sb_start; i < sb_end; i++) { + if (get_bits_left(gb) < ((s->total_num_coded_frags + num_coded_frags) >> 2)) { + av_log(s->avctx, AV_LOG_ERROR, "Insufficient input data for coded fragments\n"); + return AVERROR_INVALIDDATA; + } /* iterate through all 16 fragments in a superblock */ for (j = 0; j < 16; j++) { /* if the fragment is in bounds, check its coding status */ -- 2.17.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
