diff options
| author | Paul Moore <paul.moore@hp.com> | 2008-01-29 08:38:10 -0500 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-01-30 08:17:22 +1100 |
| commit | da5645a28a15aed2e541a814ecf9f7ffcd4c4673 (patch) | |
| tree | 8cedccebd0e12308de30573ad593d703943e3cbb /security | |
| parent | e8bfdb9d0dfc1231a6a71e849dfbd4447acdfff6 (diff) | |
| download | lwn-da5645a28a15aed2e541a814ecf9f7ffcd4c4673.tar.gz lwn-da5645a28a15aed2e541a814ecf9f7ffcd4c4673.zip | |
SELinux: Only store the network interface's ifindex
Instead of storing the packet's network interface name store the ifindex. This
allows us to defer the need to lookup the net_device structure until the audit
record is generated meaning that in the majority of cases we never need to
bother with this at all.
Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/selinux/avc.c | 15 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 4 | ||||
| -rw-r--r-- | security/selinux/include/avc.h | 2 |
3 files changed, 15 insertions, 6 deletions
diff --git a/security/selinux/avc.c b/security/selinux/avc.c index 81b3dff3cbf0..e8529e2f51e5 100644 --- a/security/selinux/avc.c +++ b/security/selinux/avc.c @@ -661,9 +661,18 @@ void avc_audit(u32 ssid, u32 tsid, "daddr", "dest"); break; } - if (a->u.net.netif) - audit_log_format(ab, " netif=%s", - a->u.net.netif); + if (a->u.net.netif > 0) { + struct net_device *dev; + + /* NOTE: we always use init's namespace */ + dev = dev_get_by_index(&init_net, + a->u.net.netif); + if (dev) { + audit_log_format(ab, " netif=%s", + dev->name); + dev_put(dev); + } + } break; } } diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index be544332214c..1a1fa3f20ef0 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3928,7 +3928,7 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) family = PF_INET; AVC_AUDIT_DATA_INIT(&ad, NET); - ad.u.net.netif = skb->dev ? skb->dev->name : "[unknown]"; + ad.u.net.netif = skb->iif; ad.u.net.family = family; err = selinux_parse_skb(skb, &ad, &addrp, &len, 1, NULL); @@ -4259,7 +4259,7 @@ static unsigned int selinux_ip_postroute_last(unsigned int hooknum, sksec = sk->sk_security; AVC_AUDIT_DATA_INIT(&ad, NET); - ad.u.net.netif = dev->name; + ad.u.net.netif = dev->ifindex; ad.u.net.family = family; err = selinux_parse_skb(skb, &ad, &addrp, &len, 0, &proto); diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h index 553607a19e92..80c28fa6621c 100644 --- a/security/selinux/include/avc.h +++ b/security/selinux/include/avc.h @@ -51,7 +51,7 @@ struct avc_audit_data { struct inode *inode; } fs; struct { - char *netif; + int netif; struct sock *sk; u16 family; __be16 dport; |