On Sat, 5 May 2018 21:10:06 +0200 Michael Niedermayer <mich...@niedermayer.cc> wrote:
> 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 */ The log message is pointless bloat. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
