Add SELinux context support for AUDIT target. Typical (raw auditd) output after applying this patch would be:
type=NETFILTER_PKT msg=audit(1305852240.082:31012): action=0 hook=3 len=52 inif=? outif=eth0 subj=system_u:object_r:sshd_packet_t:s0 saddr=10.1.1.7 daddr=10.1.2.1 ipid=16312 proto=6 sport=56150 dport=22
Signed-off-by: Mr Dash Four <mr.dash.four@xxxxxxxxxxxxxx>
---
net/netfilter/xt_AUDIT.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/net/netfilter/xt_AUDIT.c b/net/netfilter/xt_AUDIT.c
index 363a99e..438f82a 100644
--- a/net/netfilter/xt_AUDIT.c
+++ b/net/netfilter/xt_AUDIT.c
@@ -20,6 +20,7 @@
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_AUDIT.h>
#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/security.h>
#include <net/ipv6.h>
#include <net/ip.h>
@@ -122,6 +123,10 @@ audit_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct xt_audit_info *info = par->targinfo;
struct audit_buffer *ab;
+#ifdef CONFIG_NF_CONNTRACK_SECMARK
+ u32 len;
+ char *secctx;
+#endif
ab = audit_log_start(NULL, GFP_ATOMIC, AUDIT_NETFILTER_PKT);
if (ab == NULL)
@@ -135,6 +140,14 @@ audit_tg(struct sk_buff *skb, const struct xt_action_param *par)
if (skb->mark)
audit_log_format(ab, " mark=%#x", skb->mark);
+#ifdef CONFIG_NF_CONNTRACK_SECMARK
+ if (skb->secmark)
+ if (!security_secid_to_secctx(skb->secmark, &secctx, &len)) {
+ audit_log_format(ab, " subj=%s", secctx);
+ security_release_secctx(secctx, len);
+ }
+#endif
+
if (skb->dev && skb->dev->type == ARPHRD_ETHER) {
audit_log_format(ab, " smac=%pM dmac=%pM macproto=0x%04x",
eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
--
1.7.3.4
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