[FFmpeg-cvslog] swr: check count argument of realloc_audio()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue May 22 17:15:07 2012 +0200| [a645049bd8e9fa38860d44902fcee55867f73140] | committer: Michael Niedermayer

swr: check count argument of realloc_audio()

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a645049bd8e9fa38860d44902fcee55867f73140
---

 libswresample/swresample.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libswresample/swresample.c b/libswresample/swresample.c
index 60706d3..732dae7 100644
--- a/libswresample/swresample.c
+++ b/libswresample/swresample.c
@@ -344,6 +344,9 @@ static int realloc_audio(AudioData *a, int count){
     int i, countb;
     AudioData old;
 
+    if(count < 0 || count > INT_MAX/2/a->bps/a->ch_count)
+        return AVERROR(EINVAL);
+
     if(a->count >= count)
         return 0;