[FFmpeg-cvslog] avcodec/dcadec: Check active_bands
Michael Niedermayer
git at videolan.org
Fri May 15 20:32:47 CEST 2015
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri May 15 18:29:40 2015 +0200| [fc624ec9ba7e5c4e8d905ac10f605a43d123f95a] | committer: Michael Niedermayer
avcodec/dcadec: Check active_bands
Fixes CID1297594 part2
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fc624ec9ba7e5c4e8d905ac10f605a43d123f95a
---
libavcodec/dcadec.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/libavcodec/dcadec.c b/libavcodec/dcadec.c
index 25b426d..91db893 100644
--- a/libavcodec/dcadec.c
+++ b/libavcodec/dcadec.c
@@ -1242,8 +1242,13 @@ int ff_dca_xbr_parse_frame(DCAContext *s)
for(i = 0; i < num_chsets; i++) {
n_xbr_ch[i] = get_bits(&s->gb, 3) + 1;
k = get_bits(&s->gb, 2) + 5;
- for(j = 0; j < n_xbr_ch[i]; j++)
+ for(j = 0; j < n_xbr_ch[i]; j++) {
active_bands[i][j] = get_bits(&s->gb, k) + 1;
+ if (active_bands[i][j] > DCA_SUBBANDS) {
+ av_log(s->avctx, AV_LOG_ERROR, "too many active subbands (%d)\n", active_bands[i][j]);
+ return AVERROR_INVALIDDATA;
+ }
+ }
}
/* skip to the end of the header */
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