cook: prevent div-by-zero if channels is zero.

Message ID 20120217203536.D355E5DAFF@aruru.libav.org
State New
Headers show

Commit Message

Janne Grunau Feb. 17, 2012, 8:35 p.m.
Module: libav
Branch: master
Commit: 941fc1ea1ed7f7d99a8b9e2607b41f2f2820394a

Author:    Ronald S. Bultje <rsbultje@gmail.com>
Committer: Ronald S. Bultje <rsbultje@gmail.com>
Date:      Fri Feb 17 12:10:33 2012 -0800

cook: prevent div-by-zero if channels is zero.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org

---

 libavcodec/cook.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

Patch

diff --git a/libavcodec/cook.c b/libavcodec/cook.c
index 8b6e116..bc262f1 100644
--- a/libavcodec/cook.c
+++ b/libavcodec/cook.c
@@ -1078,6 +1078,10 @@  static av_cold int cook_decode_init(AVCodecContext *avctx)
     q->sample_rate = avctx->sample_rate;
     q->nb_channels = avctx->channels;
     q->bit_rate = avctx->bit_rate;
+    if (!q->nb_channels) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
+        return AVERROR_INVALIDDATA;
+    }
 
     /* Initialize RNG. */
     av_lfg_init(&q->random_state, 0);