Audit: collect sessionid in netlink messages

Previously I added sessionid output to all audit messages where it was
available but we still didn't know the sessionid of the sender of
netlink messages.  This patch adds that information to netlink messages
so we can audit who sent netlink messages.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 46f3e44bb83a..9b97f8006c9c 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1248,6 +1248,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
         NETLINK_CB(skb).pid     = nlk->pid;
         NETLINK_CB(skb).dst_group = dst_group;
         NETLINK_CB(skb).loginuid = audit_get_loginuid(current);
+        NETLINK_CB(skb).sessionid = audit_get_sessionid(current);
         security_task_getsecid(current, &(NETLINK_CB(skb).sid));
         memcpy(NETLINK_CREDS(skb), &siocb->scm->creds, sizeof(struct ucred));