[NETLINK]: Fix missing dst_groups initializations in netlink_broadcast users

netlink_broadcast users must initialize NETLINK_CB(skb).dst_groups to the
destination group mask for netlink_recvmsg.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

lib/kobject_uevent.c

@@ -93,6 +93,7 @@ static int send_uevent(const char *signal, const char *obj,
 		}
 	}
 
+	NETLINK_CB(skb).dst_groups = 1;
 	return netlink_broadcast(uevent_sock, skb, 0, 1, gfp_mask);
 }
 

net/xfrm/xfrm_user.c

@@ -1152,6 +1152,8 @@ static int xfrm_notify_sa_flush(struct km_event *c)
 
 	nlh->nlmsg_len = skb->tail - b;
 
+	NETLINK_CB(skb).dst_groups = XFRMGRP_SA;
+
 	return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_SA, GFP_ATOMIC);
 
 nlmsg_failure:
@@ -1226,6 +1228,8 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
 
 	nlh->nlmsg_len = skb->tail - b;
 
+	NETLINK_CB(skb).dst_groups = XFRMGRP_SA;
+
 	return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_SA, GFP_ATOMIC);
 
 nlmsg_failure:
@@ -1455,6 +1459,8 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *
 
 	nlh->nlmsg_len = skb->tail - b;
 
+	NETLINK_CB(skb).dst_groups = XFRMGRP_POLICY;
+
 	return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_POLICY, GFP_ATOMIC);
 
 nlmsg_failure:
@@ -1480,6 +1486,8 @@ static int xfrm_notify_policy_flush(struct km_event *c)
 
 	nlh->nlmsg_len = skb->tail - b;
 
+	NETLINK_CB(skb).dst_groups = XFRMGRP_POLICY;
+
 	return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_POLICY, GFP_ATOMIC);
 
 nlmsg_failure:

security/selinux/netlink.c

@@ -80,6 +80,7 @@ static void selnl_notify(int msgtype, void *data)
 	nlh = NLMSG_PUT(skb, 0, 0, msgtype, len);
 	selnl_add_payload(nlh, len, msgtype, data);
 	nlh->nlmsg_len = skb->tail - tmp;
+	NETLINK_CB(skb).dst_groups = SELNL_GRP_AVC;
 	netlink_broadcast(selnl, skb, 0, SELNL_GRP_AVC, GFP_USER);
 out:
 	return;