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[NETLINK]: Encapsulate eff_cap usage within security framework.

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This patch encapsulates the usage of eff_cap (in netlink_skb_params) within
the security framework by extending security_netlink_recv to include a required
capability parameter and converting all direct usage of eff_caps outside
of the lsm modules to use the interface.  It also updates the SELinux
implementation of the security_netlink_send and security_netlink_recv
hooks to take advantage of the sid in the netlink_skb_params struct.
This also enables SELinux to perform auditing of netlink capability checks.
Please apply, for 2.6.18 if possible.

Signed-off-by: Darrel Goeddel <dgoeddel@trustedcs.com>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by:  James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Darrel Goeddel 2006-06-27 13:26:11 -07:00 • committed by David S. Miller
parent 576a30eb64
commit c7bdb545d2
12 changed files with 35 additions and 34 deletions
Download patch file Download diff file Expand all files Collapse all files

2
net/core/rtnetlink.c
View file

@ -663,7 +663,7 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
sz_idx = type>>2;
kind = type&3;
if (kind != 2 && security_netlink_recv(skb)) {
if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) {
*errp = -EPERM;
return -1;
}

2
net/decnet/netfilter/dn_rtmsg.c
View file

@ -107,7 +107,7 @@ static inline void dnrmg_receive_user_skb(struct sk_buff *skb)
if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
return;
if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN))
if (security_netlink_recv(skb, CAP_NET_ADMIN))
RCV_SKB_FAIL(-EPERM);
/* Eventually we might send routing messages too */

2
net/ipv4/netfilter/ip_queue.c
View file

@ -515,7 +515,7 @@ ipq_rcv_skb(struct sk_buff *skb)
if (type <= IPQM_BASE)
return;
if (security_netlink_recv(skb))
if (security_netlink_recv(skb, CAP_NET_ADMIN))
RCV_SKB_FAIL(-EPERM);
write_lock_bh(&queue_lock);

2
net/ipv6/netfilter/ip6_queue.c
View file

@ -505,7 +505,7 @@ ipq_rcv_skb(struct sk_buff *skb)
if (type <= IPQM_BASE)
return;
if (security_netlink_recv(skb))
if (security_netlink_recv(skb, CAP_NET_ADMIN))
RCV_SKB_FAIL(-EPERM);
write_lock_bh(&queue_lock);

2
net/netfilter/nfnetlink.c
View file

@ -229,7 +229,7 @@ static int nfnetlink_rcv_msg(struct sk_buff *skb,
NFNL_SUBSYS_ID(nlh->nlmsg_type),
NFNL_MSG_TYPE(nlh->nlmsg_type));
if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN)) {
if (security_netlink_recv(skb, CAP_NET_ADMIN)) {
DEBUGP("missing CAP_NET_ADMIN\n");
*errp = -EPERM;
return -1;

2
net/netlink/genetlink.c
View file

@ -320,7 +320,7 @@ static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
goto errout;
}
if ((ops->flags & GENL_ADMIN_PERM) && security_netlink_recv(skb)) {
if ((ops->flags & GENL_ADMIN_PERM) && security_netlink_recv(skb, CAP_NET_ADMIN)) {
err = -EPERM;
goto errout;
}

2
net/xfrm/xfrm_user.c
View file

@ -1435,7 +1435,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *err
link = &xfrm_dispatch[type];
/* All operations require privileges, even GET */
if (security_netlink_recv(skb)) {
if (security_netlink_recv(skb, CAP_NET_ADMIN)) {
*errp = -EPERM;
return -1;
}