[PATCH V5 10/13] audit: log on switching namespace (setns)
Added six new audit message types, AUDIT_NS_SET_* and function
audit_log_ns_set() to log a switch of namespace.
Signed-off-by: Richard Guy Briggs <rgb(a)redhat.com>
---
include/linux/audit.h | 4 +++
include/uapi/linux/audit.h | 6 +++++
kernel/audit.c | 46 ++++++++++++++++++++++++++++++++++++++++++++
kernel/nsproxy.c | 3 ++
4 files changed, 59 insertions(+), 0 deletions(-)
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 1474334..9de9b25 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -26,6 +26,7 @@
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <uapi/linux/audit.h>
+#include <linux/proc_ns.h>
struct audit_sig_info {
uid_t uid;
@@ -484,6 +485,7 @@ static inline void audit_log_ns_info(struct task_struct *tsk)
extern int audit_log_ns_init(int type, long long old_snum,
long long snum);
extern int audit_log_ns_del(int type, long long snum);
+extern void audit_log_ns_set(const struct proc_ns_operations *ops, void *ns);
extern int audit_update_lsm_rules(void);
@@ -547,6 +549,8 @@ static inline int audit_log_ns_init(int type, long long old_snum,
{ }
static inline int audit_log_ns_del(int type, long long snum)
{ }
+static inline void audit_log_ns_set(const struct proc_ns_operations *ops, void *ns)
+{ }
#define audit_enabled 0
#endif /* CONFIG_AUDIT */
static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index 1acfea7..7ec7209 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -123,6 +123,12 @@
#define AUDIT_NS_DEL_USER 1339 /* Record USER namespace instance deletion */
#define AUDIT_NS_DEL_PID 1340 /* Record PID namespace instance deletion */
#define AUDIT_NS_DEL_NET 1341 /* Record NET namespace instance deletion */
+#define AUDIT_NS_SET_MNT 1342 /* Record mount namespace instance deletion */
+#define AUDIT_NS_SET_UTS 1343 /* Record UTS namespace instance deletion */
+#define AUDIT_NS_SET_IPC 1344 /* Record IPC namespace instance deletion */
+#define AUDIT_NS_SET_USER 1345 /* Record USER namespace instance deletion */
+#define AUDIT_NS_SET_PID 1346 /* Record PID namespace instance deletion */
+#define AUDIT_NS_SET_NET 1347 /* Record NET namespace instance deletion */
#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
diff --git a/kernel/audit.c b/kernel/audit.c
index cc63445..84590d1 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -2021,6 +2021,52 @@ int audit_log_ns_del(int type, long long snum)
audit_log_end(ab);
return 0;
}
+
+/**
+ * audit_log_ns_set - report a namespace set change
+ * @ops: the ops structure for the namespace to be changed
+ * @ns: the new namespace
+ */
+void audit_log_ns_set(const struct proc_ns_operations *ops, void *ns)
+{
+ struct audit_buffer *ab;
+ void *old_ns;
+ int msg_type;
+
+ switch (ops->type) {
+ case CLONE_NEWNS:
+ msg_type = AUDIT_NS_SET_MNT;
+ break;
+ case CLONE_NEWUTS:
+ msg_type = AUDIT_NS_SET_UTS;
+ break;
+ case CLONE_NEWIPC:
+ msg_type = AUDIT_NS_SET_IPC;
+ break;
+ case CLONE_NEWUSER:
+ msg_type = AUDIT_NS_SET_USER;
+ break;
+ case CLONE_NEWPID:
+ msg_type = AUDIT_NS_SET_PID;
+ break;
+ case CLONE_NEWNET:
+ msg_type = AUDIT_NS_SET_NET;
+ break;
+ default:
+ return;
+ }
+ //ab = audit_log_start(tsk->audit_context, GFP_KERNEL, msg_type);
+ //audit_log_format(ab, " pid=%d", current->pid);
+ audit_log_common_recv_msg(&ab, ops->type);
+ if (!ab)
+ return;
+ old_ns = ops->get(current);
+ audit_log_format(ab, " old-%ssn=%llx %ssn=%llx",
+ ops->name, ops->snum(old_ns),
+ ops->name, ops->snum(ns));
+ ops->put(old_ns);
+ audit_log_end(ab);
+}
#endif /* CONFIG_NAMESPACES */
/**
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 2cdc16b..e37409a 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -275,6 +275,9 @@ SYSCALL_DEFINE2(setns, int, fd, int, nstype)
goto out;
}
switch_task_namespaces(tsk, new_nsproxy);
+
+ audit_log_ns_set(ops, ei->ns);
+
out:
fput(file);
return err;
--
1.7.1