[FFmpeg-cvslog] avformat/nistspheredec: initialize header_size to -1

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Dec 20 18:07:30 2013 +0100| [632fdec9f4eb80dc8301cb938bce4b470fed0c11] | committer: Michael Niedermayer

avformat/nistspheredec: initialize header_size to -1

Fixes use of uninitialized memory
This also avoids the need to check the scanf() return as the subsequent check catches it
Fixes: msan_uninit-mem_7f712e4dc173_7414_nist_ulaw.nist
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=632fdec9f4eb80dc8301cb938bce4b470fed0c11
---

 libavformat/nistspheredec.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/nistspheredec.c b/libavformat/nistspheredec.c
index 76f65ec..2c96686 100644
--- a/libavformat/nistspheredec.c
+++ b/libavformat/nistspheredec.c
@@ -36,7 +36,7 @@ static int nist_read_header(AVFormatContext *s)
 {
     char buffer[32], coding[32] = "pcm", format[32] = "01";
     int bps = 0, be = 0;
-    int32_t header_size;
+    int32_t header_size = -1;
     AVStream *st;
 
     st = avformat_new_stream(s, NULL);