[PATCH] net: core: sock: fix information leak to userland

[Vasiliy Kulikov <segooon@gmail.com>]

"Address" variable might be not fully initialized in sock->ops->get_name().
The only current implementation is get_name(), it leaves some padding
fields of sockaddr_tipc uninitialized.  It leads to leaking of contents
of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
---
 Compile tested.

 net/core/sock.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index 3eed542..759dd81 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -930,6 +930,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 	{
 		char address[128];
 
+		memset(&address, 0, sizeof(address));
 		if (sock->ops->getname(sock, (struct sockaddr *)address, &lv, 2))
 			return -ENOTCONN;
 		if (lv < len)
-- 
1.7.0.4