AUDIT: Add message types to audit records
This patch adds more messages types to the audit subsystem so that audit
analysis is quicker, intuitive, and more useful.
Signed-off-by: Steve Grubb <sgrubb@redhat.com>
---
I forgot one type in the big patch. I need to add one for user space
originating SE Linux avc messages. This is used by dbus and nscd.
-Steve
---
Updated to 2.6.12-rc4-mm1.
-dwmw2
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 405332e..1a15ba3 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -27,15 +27,53 @@
#include <linux/sched.h>
#include <linux/elf.h>
-/* Request and reply types */
+/* The netlink messages for the audit system is divided into blocks:
+ * 1000 - 1099 are for commanding the audit system
+ * 1100 - 1199 user space trusted application messages
+ * 1200 - 1299 messages internal to the audit daemon
+ * 1300 - 1399 audit event messages
+ * 1400 - 1499 SE Linux use
+ * 1500 - 1999 future use
+ * 2000 is for otherwise unclassified kernel audit messages
+ *
+ * Messages from 1000-1199 are bi-directional. 1200-1299 are exclusively user
+ * space. Anything over that is kernel --> user space communication.
+ */
#define AUDIT_GET 1000 /* Get status */
#define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */
-#define AUDIT_LIST 1002 /* List filtering rules */
-#define AUDIT_ADD 1003 /* Add filtering rule */
-#define AUDIT_DEL 1004 /* Delete filtering rule */
-#define AUDIT_USER 1005 /* Send a message from user-space */
+#define AUDIT_LIST 1002 /* List syscall filtering rules */
+#define AUDIT_ADD 1003 /* Add syscall filtering rule */
+#define AUDIT_DEL 1004 /* Delete syscall filtering rule */
+#define AUDIT_USER 1005 /* Message from userspace -- deprecated */
#define AUDIT_LOGIN 1006 /* Define the login id and information */
-#define AUDIT_SIGNAL_INFO 1010 /* Get information about sender of signal*/
+#define AUDIT_WATCH_INS 1007 /* Insert file/dir watch entry */
+#define AUDIT_WATCH_REM 1008 /* Remove file/dir watch entry */
+#define AUDIT_WATCH_LIST 1009 /* List all file/dir watches */
+#define AUDIT_SIGNAL_INFO 1010 /* Get info about sender of signal to auditd */
+
+#define AUDIT_USER_AUTH 1100 /* User space authentication */
+#define AUDIT_USER_ACCT 1101 /* User space acct change */
+#define AUDIT_USER_MGMT 1102 /* User space acct management */
+#define AUDIT_CRED_ACQ 1103 /* User space credential acquired */
+#define AUDIT_CRED_DISP 1104 /* User space credential disposed */
+#define AUDIT_USER_START 1105 /* User space session start */
+#define AUDIT_USER_END 1106 /* User space session end */
+#define AUDIT_USER_AVC 1107 /* User space avc message */
+
+#define AUDIT_DAEMON_START 1200 /* Daemon startup record */
+#define AUDIT_DAEMON_END 1201 /* Daemon normal stop record */
+#define AUDIT_DAEMON_ABORT 1202 /* Daemon error stop record */
+#define AUDIT_DAEMON_CONFIG 1203 /* Daemon config change */
+
+#define AUDIT_SYSCALL 1300 /* Syscall event */
+#define AUDIT_FS_WATCH 1301 /* Filesystem watch event */
+#define AUDIT_PATH 1302 /* Filname path information */
+#define AUDIT_IPC 1303 /* IPC record */
+#define AUDIT_SOCKET 1304 /* Socket record */
+#define AUDIT_CONFIG_CHANGE 1305 /* Audit system configuration change */
+
+#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
+#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
#define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
@@ -216,14 +254,11 @@
#ifdef CONFIG_AUDIT
/* These are defined in audit.c */
/* Public API */
-#define audit_log(ctx, fmt, args...) \
- audit_log_type(ctx, AUDIT_KERNEL, 0, fmt, ##args)
-extern void audit_log_type(struct audit_context *ctx, int type,
- int pid, const char *fmt, ...)
- __attribute__((format(printf,4,5)));
+extern void audit_log(struct audit_context *ctx, int type,
+ const char *fmt, ...)
+ __attribute__((format(printf,3,4)));
-extern struct audit_buffer *audit_log_start(struct audit_context *ctx, int type,
- int pid);
+extern struct audit_buffer *audit_log_start(struct audit_context *ctx,int type);
extern void audit_log_format(struct audit_buffer *ab,
const char *fmt, ...)
__attribute__((format(printf,2,3)));
@@ -243,9 +278,8 @@
void *payload, int size);
extern void audit_log_lost(const char *message);
#else
-#define audit_log(c,f,...) do { ; } while (0)
-#define audit_log_type(c,t,p,f,...) do { ; } while (0)
-#define audit_log_start(c,t,p) ({ NULL; })
+#define audit_log(c,t,f,...) do { ; } while (0)
+#define audit_log_start(c,t) ({ NULL; })
#define audit_log_vformat(b,f,a) do { ; } while (0)
#define audit_log_format(b,f,...) do { ; } while (0)
#define audit_log_end(b) do { ; } while (0)
diff --git a/kernel/audit.c b/kernel/audit.c
index 1871645..4e940c0 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -140,6 +140,12 @@
struct audit_context *ctx; /* NULL or associated context */
};
+static void audit_set_pid(struct audit_buffer *ab, pid_t pid)
+{
+ struct nlmsghdr *nlh = (struct nlmsghdr *)ab->skb->data;
+ nlh->nlmsg_pid = pid;
+}
+
struct audit_entry {
struct list_head list;
struct audit_rule rule;
@@ -233,7 +239,8 @@
{
int old = audit_rate_limit;
audit_rate_limit = limit;
- audit_log(NULL, "audit_rate_limit=%d old=%d by auid %u",
+ audit_log(NULL, AUDIT_CONFIG_CHANGE,
+ "audit_rate_limit=%d old=%d by auid %u",
audit_rate_limit, old, loginuid);
return old;
}
@@ -242,7 +249,8 @@
{
int old = audit_backlog_limit;
audit_backlog_limit = limit;
- audit_log(NULL, "audit_backlog_limit=%d old=%d by auid %u",
+ audit_log(NULL, AUDIT_CONFIG_CHANGE,
+ "audit_backlog_limit=%d old=%d by auid %u",
audit_backlog_limit, old, loginuid);
return old;
}
@@ -253,8 +261,9 @@
if (state != 0 && state != 1)
return -EINVAL;
audit_enabled = state;
- audit_log(NULL, "audit_enabled=%d old=%d by auid %u",
- audit_enabled, old, loginuid);
+ audit_log(NULL, AUDIT_CONFIG_CHANGE,
+ "audit_enabled=%d old=%d by auid %u",
+ audit_enabled, old, loginuid);
return old;
}
@@ -266,8 +275,9 @@
&& state != AUDIT_FAIL_PANIC)
return -EINVAL;
audit_failure = state;
- audit_log(NULL, "audit_failure=%d old=%d by auid %u",
- audit_failure, old, loginuid);
+ audit_log(NULL, AUDIT_CONFIG_CHANGE,
+ "audit_failure=%d old=%d by auid %u",
+ audit_failure, old, loginuid);
return old;
}
@@ -316,6 +326,14 @@
err = -EPERM;
break;
case AUDIT_USER:
+ case AUDIT_USER_AUTH:
+ case AUDIT_USER_ACCT:
+ case AUDIT_USER_MGMT:
+ case AUDIT_CRED_ACQ:
+ case AUDIT_CRED_DISP:
+ case AUDIT_USER_START:
+ case AUDIT_USER_END:
+ case AUDIT_USER_AVC:
if (!cap_raised(eff_cap, CAP_AUDIT_WRITE))
err = -EPERM;
break;
@@ -332,6 +350,7 @@
void *data;
struct audit_status *status_get, status_set;
int err;
+ struct audit_buffer *ab;
u16 msg_type = nlh->nlmsg_type;
uid_t loginuid; /* loginuid of sender */
struct audit_sig_info sig_data;
@@ -373,7 +392,8 @@
if (status_get->mask & AUDIT_STATUS_PID) {
int old = audit_pid;
audit_pid = status_get->pid;
- audit_log(NULL, "audit_pid=%d old=%d by auid %u",
+ audit_log(NULL, AUDIT_CONFIG_CHANGE,
+ "audit_pid=%d old=%d by auid %u",
audit_pid, old, loginuid);
}
if (status_get->mask & AUDIT_STATUS_RATE_LIMIT)
@@ -383,13 +403,26 @@
loginuid);
break;
case AUDIT_USER:
- audit_log_type(NULL, AUDIT_USER, pid,
+ case AUDIT_USER_AUTH:
+ case AUDIT_USER_ACCT:
+ case AUDIT_USER_MGMT:
+ case AUDIT_CRED_ACQ:
+ case AUDIT_CRED_DISP:
+ case AUDIT_USER_START:
+ case AUDIT_USER_END:
+ case AUDIT_USER_AVC:
+ ab = audit_log_start(NULL, msg_type);
+ if (!ab)
+ break; /* audit_panic has been called */
+ audit_log_format(ab,
"user pid=%d uid=%d length=%d loginuid=%u"
" msg='%.1024s'",
pid, uid,
(int)(nlh->nlmsg_len
- ((char *)data - (char *)nlh)),
loginuid, (char *)data);
+ audit_set_pid(ab, pid);
+ audit_log_end(ab);
break;
case AUDIT_ADD:
case AUDIT_DEL:
@@ -504,7 +537,7 @@
audit_initialized = 1;
audit_enabled = audit_default;
- audit_log(NULL, "initialized");
+ audit_log(NULL, AUDIT_KERNEL, "initialized");
return 0;
}
__initcall(audit_init);
@@ -541,10 +574,12 @@
spin_unlock_irqrestore(&audit_freelist_lock, flags);
}
-static struct audit_buffer * audit_buffer_alloc(int gfp_mask)
+static struct audit_buffer * audit_buffer_alloc(struct audit_context *ctx,
+ int gfp_mask, int type)
{
unsigned long flags;
struct audit_buffer *ab = NULL;
+ struct nlmsghdr *nlh;
spin_lock_irqsave(&audit_freelist_lock, flags);
if (!list_empty(&audit_freelist)) {
@@ -566,6 +601,12 @@
if (!ab->skb)
goto err;
+ ab->ctx = ctx;
+ nlh = (struct nlmsghdr *)skb_put(ab->skb, NLMSG_SPACE(0));
+ nlh->nlmsg_type = type;
+ nlh->nlmsg_flags = 0;
+ nlh->nlmsg_pid = 0;
+ nlh->nlmsg_seq = 0;
return ab;
err:
audit_buffer_free(ab);
@@ -578,12 +619,11 @@
* syscall, then the syscall is marked as auditable and an audit record
* will be written at syscall exit. If there is no associated task, tsk
* should be NULL. */
-struct audit_buffer *audit_log_start(struct audit_context *ctx, int type, int pid)
+struct audit_buffer *audit_log_start(struct audit_context *ctx, int type)
{
struct audit_buffer *ab = NULL;
struct timespec t;
unsigned int serial;
- struct nlmsghdr *nlh;
if (!audit_initialized)
return NULL;
@@ -600,19 +640,12 @@
return NULL;
}
- ab = audit_buffer_alloc(GFP_ATOMIC);
+ ab = audit_buffer_alloc(ctx, GFP_ATOMIC, type);
if (!ab) {
audit_log_lost("out of memory in audit_log_start");
return NULL;
}
- ab->ctx = ctx;
- nlh = (struct nlmsghdr *)skb_put(ab->skb, NLMSG_SPACE(0));
- nlh->nlmsg_type = type;
- nlh->nlmsg_flags = 0;
- nlh->nlmsg_pid = pid;
- nlh->nlmsg_seq = 0;
-
if (!audit_get_stamp(ab->ctx, &t, &serial)) {
t = CURRENT_TIME;
serial = 0;
@@ -809,13 +842,12 @@
/* Log an audit record. This is a convenience function that calls
* audit_log_start, audit_log_vformat, and audit_log_end. It may be
* called in any context. */
-void audit_log_type(struct audit_context *ctx, int type, int pid,
- const char *fmt, ...)
+void audit_log(struct audit_context *ctx, int type, const char *fmt, ...)
{
struct audit_buffer *ab;
va_list args;
- ab = audit_log_start(ctx, type, pid);
+ ab = audit_log_start(ctx, type);
if (ab) {
va_start(args, fmt);
audit_log_vformat(ab, fmt, args);
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index d089263..1b7c91f 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -286,7 +286,8 @@
err = audit_add_rule(entry, &audit_entlist);
if (!err && (flags & AUDIT_AT_EXIT))
err = audit_add_rule(entry, &audit_extlist);
- audit_log(NULL, "auid %u added an audit rule\n", loginuid);
+ audit_log(NULL, AUDIT_CONFIG_CHANGE,
+ "auid %u added an audit rule\n", loginuid);
break;
case AUDIT_DEL:
flags =((struct audit_rule *)data)->flags;
@@ -296,7 +297,8 @@
err = audit_del_rule(data, &audit_entlist);
if (!err && (flags & AUDIT_AT_EXIT))
err = audit_del_rule(data, &audit_extlist);
- audit_log(NULL, "auid %u removed an audit rule\n", loginuid);
+ audit_log(NULL, AUDIT_CONFIG_CHANGE,
+ "auid %u removed an audit rule\n", loginuid);
break;
default:
return -EINVAL;
@@ -648,7 +650,7 @@
int i;
struct audit_buffer *ab;
- ab = audit_log_start(context, AUDIT_KERNEL, 0);
+ ab = audit_log_start(context, AUDIT_SYSCALL);
if (!ab)
return; /* audit_panic has been called */
audit_log_format(ab, "syscall=%d", context->major);
@@ -680,28 +682,28 @@
while (context->aux) {
struct audit_aux_data *aux;
- ab = audit_log_start(context, AUDIT_KERNEL, 0);
+ aux = context->aux;
+
+ ab = audit_log_start(context, aux->type);
if (!ab)
continue; /* audit_panic has been called */
- aux = context->aux;
- context->aux = aux->next;
-
- audit_log_format(ab, "auxitem=%d", aux->type);
switch (aux->type) {
- case AUDIT_AUX_IPCPERM: {
+ case AUDIT_IPC: {
struct audit_aux_data_ipcctl *axi = (void *)aux;
audit_log_format(ab,
- " qbytes=%lx uid=%d gid=%d mode=%x",
+ " qbytes=%lx iuid=%d igid=%d mode=%x",
axi->qbytes, axi->uid, axi->gid, axi->mode);
}
}
audit_log_end(ab);
+
+ context->aux = aux->next;
kfree(aux);
}
for (i = 0; i < context->name_count; i++) {
- ab = audit_log_start(context, AUDIT_KERNEL, 0);
+ ab = audit_log_start(context, AUDIT_PATH);
if (!ab)
continue; /* audit_panic has been called */
audit_log_format(ab, "item=%d", i);
@@ -711,7 +713,7 @@
}
if (context->names[i].ino != (unsigned long)-1)
audit_log_format(ab, " inode=%lu dev=%02x:%02x mode=%#o"
- " uid=%d gid=%d rdev=%02x:%02x",
+ " ouid=%d ogid=%d rdev=%02x:%02x",
context->names[i].ino,
MAJOR(context->names[i].dev),
MINOR(context->names[i].dev),
@@ -1008,10 +1010,16 @@
int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
{
if (task->audit_context) {
- audit_log_type(NULL, AUDIT_LOGIN, 0,
- "login pid=%d uid=%u old loginuid=%u new loginuid=%u",
- task->pid, task->uid, task->audit_context->loginuid,
- loginuid);
+ struct audit_buffer *ab;
+
+ ab = audit_log_start(NULL, AUDIT_LOGIN);
+ if (ab) {
+ audit_log_format(ab, "login pid=%d uid=%u "
+ "old loginuid=%u new loginuid=%u",
+ task->pid, task->uid,
+ task->audit_context->loginuid, loginuid);
+ audit_log_end(ab);
+ }
task->audit_context->loginuid = loginuid;
}
return 0;
@@ -1039,7 +1047,7 @@
ax->gid = gid;
ax->mode = mode;
- ax->d.type = AUDIT_AUX_IPCPERM;
+ ax->d.type = AUDIT_IPC;
ax->d.next = context->aux;
context->aux = (void *)ax;
return 0;
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 9e71a1b..042f91e 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -242,7 +242,7 @@
avc_node_cachep = kmem_cache_create("avc_node", sizeof(struct avc_node),
0, SLAB_PANIC, NULL, NULL);
- audit_log(current->audit_context, "AVC INITIALIZED\n");
+ audit_log(current->audit_context, AUDIT_KERNEL, "AVC INITIALIZED\n");
}
int avc_get_hash_stats(char *page)
@@ -549,7 +549,7 @@
return;
}
- ab = audit_log_start(current->audit_context, AUDIT_KERNEL, 0);
+ ab = audit_log_start(current->audit_context, AUDIT_AVC);
if (!ab)
return; /* audit_panic has been called */
audit_log_format(ab, "avc: %s ", denied ? "denied" : "granted");
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index aae1e79..db845cb 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3419,7 +3419,7 @@
err = selinux_nlmsg_lookup(isec->sclass, nlh->nlmsg_type, &perm);
if (err) {
if (err == -EINVAL) {
- audit_log(current->audit_context,
+ audit_log(current->audit_context, AUDIT_SELINUX_ERR,
"SELinux: unrecognized netlink message"
" type=%hu for sclass=%hu\n",
nlh->nlmsg_type, isec->sclass);
diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
index deac143..67e77ac 100644
--- a/security/selinux/nlmsgtab.c
+++ b/security/selinux/nlmsgtab.c
@@ -98,6 +98,14 @@
{ AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
{ AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
{ AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
+ { AUDIT_USER_AUTH, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
+ { AUDIT_USER_ACCT, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
+ { AUDIT_USER_MGMT, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
+ { AUDIT_CRED_ACQ, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
+ { AUDIT_CRED_DISP, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
+ { AUDIT_USER_START, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
+ { AUDIT_USER_END, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
+ { AUDIT_USER_AVC, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
};
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 5a820cf..07fdf6e 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -365,7 +365,7 @@
goto out;
if (context_struct_to_string(tcontext, &t, &tlen) < 0)
goto out;
- audit_log(current->audit_context,
+ audit_log(current->audit_context, AUDIT_SELINUX_ERR,
"security_validate_transition: denied for"
" oldcontext=%s newcontext=%s taskcontext=%s tclass=%s",
o, n, t, policydb.p_class_val_to_name[tclass-1]);
@@ -742,7 +742,7 @@
goto out;
if (context_struct_to_string(newcontext, &n, &nlen) < 0)
goto out;
- audit_log(current->audit_context,
+ audit_log(current->audit_context, AUDIT_SELINUX_ERR,
"security_compute_sid: invalid context %s"
" for scontext=%s"
" tcontext=%s"
