[nginx] Core: fixed possible use of an uninitialized variable.

[Homutov Vladimir]

details:   http://hg.nginx.org/nginx/rev/b6ffe53f9c3d
branches:  
changeset: 5264:b6ffe53f9c3d
user:      Vladimir Homutov <vl at nginx.com>
date:      Thu Jul 11 19:50:19 2013 +0400
description:
Core: fixed possible use of an uninitialized variable.

The call to ngx_sock_ntop() in ngx_connection_local_sockaddr() might be
performed with the uninitialized "len" variable.  The fix is to initialize
variable to the size of corresponding socket address type.

The issue was introduced in commit 05ba5bce31e0.

diffstat:

 src/core/ngx_connection.c |  2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diffs (19 lines):

diff -r 05ba5bce31e0 -r b6ffe53f9c3d src/core/ngx_connection.c
--- a/src/core/ngx_connection.c	Thu Jul 11 16:07:25 2013 +0400
+++ b/src/core/ngx_connection.c	Thu Jul 11 19:50:19 2013 +0400
@@ -1034,6 +1034,7 @@ ngx_connection_local_sockaddr(ngx_connec
 #if (NGX_HAVE_INET6)
     case AF_INET6:
         sin6 = (struct sockaddr_in6 *) c->local_sockaddr;
+        len = sizeof(struct sockaddr_in6);
 
         for (addr = 0, i = 0; addr == 0 && i < 16; i++) {
             addr |= sin6->sin6_addr.s6_addr[i];
@@ -1044,6 +1045,7 @@ ngx_connection_local_sockaddr(ngx_connec
 
     default: /* AF_INET */
         sin = (struct sockaddr_in *) c->local_sockaddr;
+        len = sizeof(struct sockaddr_in);
         addr = sin->sin_addr.s_addr;
         break;
     }