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SELinux: Add warning messages on network denial due to error

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Currently network traffic can be sliently dropped due to non-avc errors which
can lead to much confusion when trying to debug the problem.  This patch adds
warning messages so that when these events occur there is a user visible
notification.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Paul Moore
2008-01-29 08:51:16 -05:00
committed by James Morris
parent effad8df44
commit 71f1cb05f7
3 changed files with 40 additions and 8 deletions
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29
security/selinux/hooks.c
View File

@@ -3443,6 +3443,11 @@ static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
break;
}
if (unlikely(ret))
printk(KERN_WARNING
"SELinux: failure in selinux_parse_skb(),"
" unable to parse packet\n");
return ret;
}
@@ -3463,6 +3468,7 @@ static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
*/
static int selinux_skb_peerlbl_sid(struct sk_buff *skb, u16 family, u32 *sid)
{
int err;
u32 xfrm_sid;
u32 nlbl_sid;
u32 nlbl_type;
@@ -3470,10 +3476,13 @@ static int selinux_skb_peerlbl_sid(struct sk_buff *skb, u16 family, u32 *sid)
selinux_skb_xfrm_sid(skb, &xfrm_sid);
selinux_netlbl_skbuff_getsid(skb, family, &nlbl_type, &nlbl_sid);
if (security_net_peersid_resolve(nlbl_sid, nlbl_type,
xfrm_sid,
sid) != 0)
err = security_net_peersid_resolve(nlbl_sid, nlbl_type, xfrm_sid, sid);
if (unlikely(err)) {
printk(KERN_WARNING
"SELinux: failure in selinux_skb_peerlbl_sid(),"
" unable to determine packet's peer label\n");
return -EACCES;
}
return 0;
}
@@ -3925,8 +3934,13 @@ static int selinux_sock_rcv_skb_iptables_compat(struct sock *sk,
err = security_port_sid(sk->sk_family, sk->sk_type,
sk->sk_protocol, ntohs(ad->u.net.sport),
&port_sid);
if (err)
if (unlikely(err)) {
printk(KERN_WARNING
"SELinux: failure in"
" selinux_sock_rcv_skb_iptables_compat(),"
" network port label not found\n");
return err;
}
return avc_has_perm(sk_sid, port_sid, sk_class, recv_perm, ad);
}
@@ -4343,8 +4357,13 @@ static int selinux_ip_postroute_iptables_compat(struct sock *sk,
err = security_port_sid(sk->sk_family, sk->sk_type,
sk->sk_protocol, ntohs(ad->u.net.dport),
&port_sid);
if (err)
if (unlikely(err)) {
printk(KERN_WARNING
"SELinux: failure in"
" selinux_ip_postroute_iptables_compat(),"
" network port label not found\n");
return err;
}
return avc_has_perm(sk_sid, port_sid, sk_class, send_perm, ad);
}