[RFC PATCH ghak32 V2 12/13] audit: NETFILTER_PKT: record each container ID associated with a netNS

Richard Guy Briggs
2018-03-16T09:00:39Z

Add container ID auxiliary record(s) to NETFILTER_PKT event standalone
records. Iterate through all potential container IDs associated with a
network namespace.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
---
kernel/audit.c | 1 +
kernel/auditsc.c | 2 ++
net/netfilter/xt_AUDIT.c | 15 ++++++++++++++-
3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index 08662b4..3c77e47 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -2102,6 +2102,7 @@ int audit_log_container_info(struct audit_context *context,
audit_log_end(ab);
return 0;
}
+EXPORT_SYMBOL(audit_log_container_info);

void audit_log_key(struct audit_buffer *ab, char *key)
{
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 208da962..af68d01 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -975,6 +975,7 @@ struct audit_context *audit_alloc_local(void)
context->in_syscall = 1;
return context;
}
+EXPORT_SYMBOL(audit_alloc_local);

inline void audit_free_context(struct audit_context *context)
{
@@ -989,6 +990,7 @@ inline void audit_free_context(struct audit_context *context)
audit_proctitle_free(context);
kfree(context);
}
+EXPORT_SYMBOL(audit_free_context);

static int audit_log_pid_context(struct audit_context *context, pid_t pid,
kuid_t auid, kuid_t uid, unsigned int sessionid,
diff --git a/net/netfilter/xt_AUDIT.c b/net/netfilter/xt_AUDIT.c
index c502419..edaa456 100644
--- a/net/netfilter/xt_AUDIT.c
+++ b/net/netfilter/xt_AUDIT.c
@@ -71,10 +71,14 @@ static bool audit_ip6(struct audit_buffer *ab, struct sk_buff *skb)
{
struct audit_buffer *ab;
int fam = -1;
+ struct audit_context *context = audit_alloc_local();
+ struct audit_containerid *cont;
+ int i = 0;
+ struct net *net;

if (audit_enabled == 0)
goto errout;
- ab = audit_log_start(NULL, GFP_ATOMIC, AUDIT_NETFILTER_PKT);
+ ab = audit_log_start(context, GFP_ATOMIC, AUDIT_NETFILTER_PKT);
if (ab == NULL)
goto errout;

@@ -104,7 +108,16 @@ static bool audit_ip6(struct audit_buffer *ab, struct sk_buff *skb)

audit_log_end(ab);

+ net = sock_net(NETLINK_CB(skb).sk);
+ list_for_each_entry(cont, &net->audit_containerid, list) {
+ char buf[14];
+
+ sprintf(buf, "net%u", i++);
+ audit_log_container_info(context, buf, cont->id);
+ }
+
errout:
+ audit_free_context(context);
return XT_CONTINUE;
}

--
1.8.3.1