ffmpeg | branch: release/3.3 | Michael Niedermayer <mich...@niedermayer.cc> | Sun Feb 11 03:38:54 2018 +0100| [76a886dae364c665ee83d3eac44e28062b687baa] | committer: Michael Niedermayer
avcodec/vp3: Error out on invalid num_coeffs in unpack_vlcs() This fixes a hypothetical integer overflow Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit f2318aee8ca8df1c84092f7d6691a2d0df02c474) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=76a886dae364c665ee83d3eac44e28062b687baa --- libavcodec/vp3.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c index e46a9e6971..bb4e554dde 100644 --- a/libavcodec/vp3.c +++ b/libavcodec/vp3.c @@ -951,9 +951,11 @@ static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb, Vp3Fragment *all_fragments = s->all_fragments; VLC_TYPE(*vlc_table)[2] = table->table; - if (num_coeffs < 0) + if (num_coeffs < 0) { av_log(s->avctx, AV_LOG_ERROR, "Invalid number of coefficients at level %d\n", coeff_index); + return AVERROR_INVALIDDATA; + } if (eob_run > num_coeffs) { coeff_i = _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
