[FFmpeg-cvslog] nsvdec: Propagate errors

[Alex Converse]

ffmpeg | branch: master | Alex Converse <alex.converse at gmail.com> | Thu Jan 26 17:23:09 2012 -0800| [c898431ca5ef2a997fe9388b650f658fb60783e5] | committer: Alex Converse

nsvdec: Propagate errors

Related to CVE-2011-3940.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c898431ca5ef2a997fe9388b650f658fb60783e5
---

 libavformat/nsvdec.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/libavformat/nsvdec.c b/libavformat/nsvdec.c
index 7e32e43..2ad8cb3 100644
--- a/libavformat/nsvdec.c
+++ b/libavformat/nsvdec.c
@@ -532,11 +532,16 @@ static int nsv_read_header(AVFormatContext *s)
     for (i = 0; i < NSV_MAX_RESYNC_TRIES; i++) {
         if (nsv_resync(s) < 0)
             return -1;
-        if (nsv->state == NSV_FOUND_NSVF)
+        if (nsv->state == NSV_FOUND_NSVF) {
             err = nsv_parse_NSVf_header(s);
+            if (err < 0)
+                return err;
+        }
             /* we need the first NSVs also... */
         if (nsv->state == NSV_FOUND_NSVS) {
             err = nsv_parse_NSVs_header(s);
+            if (err < 0)
+                return err;
             break; /* we just want the first one */
         }
     }