[PATCH 3/3] net: tipc: fix information leak to userland
From: Vasiliy Kulikov <hidden>
Date: 2010-10-31 17:10:45
Also in:
kernel-janitors, lkml
Subsystem:
networking [general], the rest, tipc network layer · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Jon Maloy
Structure sockaddr_tipc is copied to userland with padding bytes after "id" field in union field "name" unitialized. It leads to leaking of contents of kernel stack memory. We have to initialize them to zero. Signed-off-by: Vasiliy Kulikov <redacted> --- net/tipc/socket.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 33217fc..e9f0d50 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c@@ -396,6 +396,7 @@ static int get_name(struct socket *sock, struct sockaddr *uaddr, struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; struct tipc_sock *tsock = tipc_sk(sock->sk); + memset(addr, 0, sizeof(*addr)); if (peer) { if ((sock->state != SS_CONNECTED) && ((peer != 2) || (sock->state != SS_DISCONNECTING)))
--
1.7.0.4