[FFmpeg-cvslog] swr/ build_filter: use av_calloc() fix buffer overflow

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Jan 27 05:57:58 2013 +0100| [f9abeecd94cfa335bf43e2a19b60fb990a46644f] | committer: Michael Niedermayer

swr/ build_filter: use av_calloc() fix buffer overflow

Fixes integer & buffer overflow

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f9abeecd94cfa335bf43e2a19b60fb990a46644f
---

 libswresample/resample.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libswresample/resample.c b/libswresample/resample.c
index 6cd2b8c..d3fe1a7 100644
--- a/libswresample/resample.c
+++ b/libswresample/resample.c
@@ -235,7 +235,7 @@ static ResampleContext *resample_init(ResampleContext *c, int out_rate, int in_r
         c->factor        = factor;
         c->filter_length = FFMAX((int)ceil(filter_size/factor), 1);
         c->filter_alloc  = FFALIGN(c->filter_length, 8);
-        c->filter_bank   = av_mallocz(c->filter_alloc*(phase_count+1)*c->felem_size);
+        c->filter_bank   = av_calloc(c->filter_alloc, (phase_count+1)*c->felem_size);
         c->filter_type   = filter_type;
         c->kaiser_beta   = kaiser_beta;
         if (!c->filter_bank)