[FFmpeg-cvslog] avcodec/vp3: Error out on invalid num_coeffs in unpack_vlcs()
Michael Niedermayer
git at videolan.org
Sun Feb 11 20:35:01 EET 2018
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Feb 11 03:38:54 2018 +0100| [f2318aee8ca8df1c84092f7d6691a2d0df02c474] | 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 <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f2318aee8ca8df1c84092f7d6691a2d0df02c474
---
libavcodec/vp3.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
index 33be345c14..1d83753314 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 =
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