vorbisdec: fix heap buffer overflow.

Found-by: Dale Curtis <dalecurtis@chromium.org> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
13 years ago · 8cac86e091
parent a6aa7e039a
commit 8cac86e091
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/vorbisdec.c
+++ b/libavcodec/vorbisdec.c
@ -1411,7 +1411,7 @@ static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
                                }

                            } else if (vr_type == 2) {
-                                unsigned voffs_div = FASTDIV(voffset, ch);
+                                unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch);
                                unsigned voffs_mod = voffset - voffs_div * ch;

                                for (k = 0; k < step; ++k) {