Merge branch 'audit.b46' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current

* 'audit.b46' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
  [AUDIT] Add uid, gid fields to ANOM_PROMISCUOUS message
  [AUDIT] ratelimit printk messages audit
  [patch 2/2] audit: complement va_copy with va_end()
  [patch 1/2] kernel/audit.c: warning fix
  [AUDIT] create context if auditing was ever enabled
  [AUDIT] clean up audit_receive_msg()
  [AUDIT] make audit=0 really stop audit messages
  [AUDIT] break large execve argument logging into smaller messages
  [AUDIT] include audit type in audit message when using printk
  [AUDIT] do not panic on exclude messages in audit_log_pid_context()
  [AUDIT] Add End of Event record
  [AUDIT] add session id to audit messages
  [AUDIT] collect uid, loginuid, and comm in OBJ_PID records
  [AUDIT] return EINTR not ERESTART*
  [PATCH] get rid of loginuid races
  [PATCH] switch audit_get_loginuid() to task_struct *

Documentation/filesystems/proc.txt

@@ -1134,13 +1134,6 @@ check the amount of free space (value is in seconds). Default settings are: 4,
 resume it  if we have a value of 3 or more percent; consider information about
 the amount of free space valid for 30 seconds
 
-audit_argv_kb
--------------
-
-The file contains a single value denoting the limit on the argv array size
-for execve (in KiB). This limit is only applied when system call auditing for
-execve is enabled, otherwise the value is ignored.
-
 ctrl-alt-del
 ------------
 

drivers/char/tty_audit.c

@@ -73,6 +73,7 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf)
  *	@tsk with @loginuid.  @buf->mutex must be locked.
  */
 static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
+			       unsigned int sessionid,
 			       struct tty_audit_buf *buf)
 {
 	struct audit_buffer *ab;
@@ -85,9 +86,9 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
 	if (ab) {
 		char name[sizeof(tsk->comm)];
 
-		audit_log_format(ab, "tty pid=%u uid=%u auid=%u major=%d "
-				 "minor=%d comm=", tsk->pid, tsk->uid,
-				 loginuid, buf->major, buf->minor);
+		audit_log_format(ab, "tty pid=%u uid=%u auid=%u ses=%u "
+				 "major=%d minor=%d comm=", tsk->pid, tsk->uid,
+				 loginuid, sessionid, buf->major, buf->minor);
 		get_task_comm(name, tsk);
 		audit_log_untrustedstring(ab, name);
 		audit_log_format(ab, " data=");
@@ -105,8 +106,9 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
  */
 static void tty_audit_buf_push_current(struct tty_audit_buf *buf)
 {
-	tty_audit_buf_push(current, audit_get_loginuid(current->audit_context),
-			   buf);
+	uid_t auid = audit_get_loginuid(current);
+	unsigned int sessionid = audit_get_sessionid(current);
+	tty_audit_buf_push(current, auid, sessionid, buf);
 }
 
 /**
@@ -152,6 +154,11 @@ void tty_audit_fork(struct signal_struct *sig)
 void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
 {
 	struct tty_audit_buf *buf;
+	/* FIXME I think this is correct.  Check against netlink once that is
+	 * I really need to read this code more closely.  But that's for
+	 * another patch.
+	 */
+	unsigned int sessionid = audit_get_sessionid(tsk);
 
 	spin_lock_irq(&tsk->sighand->siglock);
 	buf = tsk->signal->tty_audit_buf;
@@ -162,7 +169,7 @@ void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
 		return;
 
 	mutex_lock(&buf->mutex);
-	tty_audit_buf_push(tsk, loginuid, buf);
+	tty_audit_buf_push(tsk, loginuid, sessionid, buf);
 	mutex_unlock(&buf->mutex);
 
 	tty_audit_buf_put(buf);

fs/proc/base.c

@@ -984,7 +984,7 @@ static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
 	if (!task)
 		return -ESRCH;
 	length = scnprintf(tmpbuf, TMPBUFLEN, "%u",
-				audit_get_loginuid(task->audit_context));
+				audit_get_loginuid(task));
 	put_task_struct(task);
 	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
 }

include/linux/audit.h

@@ -98,6 +98,7 @@
 #define AUDIT_FD_PAIR		1317    /* audit record for pipe/socketpair */
 #define AUDIT_OBJ_PID		1318	/* ptrace target */
 #define AUDIT_TTY		1319	/* Input on an administrative TTY */
+#define AUDIT_EOE		1320	/* End of multi-record event */
 
 #define AUDIT_AVC		1400	/* SE Linux avc denial or grant */
 #define AUDIT_SELINUX_ERR	1401	/* Internal SE Linux Errors */
@@ -409,7 +410,8 @@ extern unsigned int audit_serial(void);
 extern void auditsc_get_stamp(struct audit_context *ctx,
 			      struct timespec *t, unsigned int *serial);
 extern int  audit_set_loginuid(struct task_struct *task, uid_t loginuid);
-extern uid_t audit_get_loginuid(struct audit_context *ctx);
+#define audit_get_loginuid(t) ((t)->loginuid)
+#define audit_get_sessionid(t) ((t)->sessionid)
 extern void audit_log_task_context(struct audit_buffer *ab);
 extern int __audit_ipc_obj(struct kern_ipc_perm *ipcp);
 extern int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
@@ -488,7 +490,8 @@ extern int audit_signals;
 #define audit_inode_child(d,i,p) do { ; } while (0)
 #define audit_core_dumps(i) do { ; } while (0)
 #define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
-#define audit_get_loginuid(c) ({ -1; })
+#define audit_get_loginuid(t) (-1)
+#define audit_get_sessionid(t) (-1)
 #define audit_log_task_context(b) do { ; } while (0)
 #define audit_ipc_obj(i) ({ 0; })
 #define audit_ipc_set_perm(q,u,g,m) ({ 0; })
@@ -522,9 +525,11 @@ extern void		    audit_log_end(struct audit_buffer *ab);
 extern void		    audit_log_hex(struct audit_buffer *ab,
 					  const unsigned char *buf,
 					  size_t len);
-extern const char *	    audit_log_untrustedstring(struct audit_buffer *ab,
+extern int		    audit_string_contains_control(const char *string,
+							  size_t len);
+extern void		    audit_log_untrustedstring(struct audit_buffer *ab,
 						      const char *string);
-extern const char *	    audit_log_n_untrustedstring(struct audit_buffer *ab,
+extern void		    audit_log_n_untrustedstring(struct audit_buffer *ab,
 							size_t n,
 							const char *string);
 extern void		    audit_log_d_path(struct audit_buffer *ab,

include/linux/init_task.h

@@ -114,6 +114,13 @@ extern struct group_info init_groups;
 	.pid = &init_struct_pid,				\
 }
 
+#ifdef CONFIG_AUDITSYSCALL
+#define INIT_IDS \
+	.loginuid = -1, \
+	.sessionid = -1,
+#else
+#define INIT_IDS
+#endif
 /*
  *  INIT_TASK is used to set up the first task table, touch at
  * your own risk!. Base=0, limit=0x1fffff (=2MB)
@@ -173,6 +180,7 @@ extern struct group_info init_groups;
 		[PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),		\
 	},								\
 	.dirties = INIT_PROP_LOCAL_SINGLE(dirties),			\
+	INIT_IDS							\
 	INIT_TRACE_IRQFLAGS						\
 	INIT_LOCKDEP							\
 }

include/linux/sched.h

@@ -1139,6 +1139,10 @@ struct task_struct {
 	void *security;
 #endif
 	struct audit_context *audit_context;
+#ifdef CONFIG_AUDITSYSCALL
+	uid_t loginuid;
+	unsigned int sessionid;
+#endif
 	seccomp_t seccomp;
 
 /* Thread group tracking */

kernel/auditfilter.c

@@ -95,6 +95,8 @@ extern struct inotify_handle *audit_ih;
 /* Inotify events we care about. */
 #define AUDIT_IN_WATCH IN_MOVE|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF
 
+extern int audit_enabled;
+
 void audit_free_parent(struct inotify_watch *i_watch)
 {
 	struct audit_parent *parent;
@@ -974,7 +976,6 @@ static void audit_update_watch(struct audit_parent *parent,
 	struct audit_watch *owatch, *nwatch, *nextw;
 	struct audit_krule *r, *nextr;
 	struct audit_entry *oentry, *nentry;
-	struct audit_buffer *ab;
 
 	mutex_lock(&audit_filter_mutex);
 	list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) {
@@ -1014,13 +1015,18 @@ static void audit_update_watch(struct audit_parent *parent,
 			call_rcu(&oentry->rcu, audit_free_rule_rcu);
 		}
 
-		ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
-		audit_log_format(ab, "op=updated rules specifying path=");
-		audit_log_untrustedstring(ab, owatch->path);
-		audit_log_format(ab, " with dev=%u ino=%lu\n", dev, ino);
-		audit_log_format(ab, " list=%d res=1", r->listnr);
-		audit_log_end(ab);
-
+		if (audit_enabled) {
+			struct audit_buffer *ab;
+			ab = audit_log_start(NULL, GFP_KERNEL,
+				AUDIT_CONFIG_CHANGE);
+			audit_log_format(ab,
+				"op=updated rules specifying path=");
+			audit_log_untrustedstring(ab, owatch->path);
+			audit_log_format(ab, " with dev=%u ino=%lu\n",
+				 dev, ino);
+			audit_log_format(ab, " list=%d res=1", r->listnr);
+			audit_log_end(ab);
+		}
 		audit_remove_watch(owatch);
 		goto add_watch_to_parent; /* event applies to a single watch */
 	}
@@ -1039,25 +1045,28 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
 	struct audit_watch *w, *nextw;
 	struct audit_krule *r, *nextr;
 	struct audit_entry *e;
-	struct audit_buffer *ab;
 
 	mutex_lock(&audit_filter_mutex);
 	parent->flags |= AUDIT_PARENT_INVALID;
 	list_for_each_entry_safe(w, nextw, &parent->watches, wlist) {
 		list_for_each_entry_safe(r, nextr, &w->rules, rlist) {
 			e = container_of(r, struct audit_entry, rule);
-
-			ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
-			audit_log_format(ab, "op=remove rule path=");
-			audit_log_untrustedstring(ab, w->path);
-			if (r->filterkey) {
-				audit_log_format(ab, " key=");
-				audit_log_untrustedstring(ab, r->filterkey);
-			} else
-				audit_log_format(ab, " key=(null)");
-			audit_log_format(ab, " list=%d res=1", r->listnr);
-			audit_log_end(ab);
-
+			if (audit_enabled) {
+				struct audit_buffer *ab;
+				ab = audit_log_start(NULL, GFP_KERNEL,
+					AUDIT_CONFIG_CHANGE);
+				audit_log_format(ab, "op=remove rule path=");
+				audit_log_untrustedstring(ab, w->path);
+				if (r->filterkey) {
+					audit_log_format(ab, " key=");
+					audit_log_untrustedstring(ab,
+							r->filterkey);
+				} else
+					audit_log_format(ab, " key=(null)");
+				audit_log_format(ab, " list=%d res=1",
+					r->listnr);
+				audit_log_end(ab);
+			}
 			list_del(&r->rlist);
 			list_del_rcu(&e->list);
 			call_rcu(&e->rcu, audit_free_rule_rcu);
@@ -1495,6 +1504,9 @@ static void audit_log_rule_change(uid_t loginuid, u32 sid, char *action,
 {
 	struct audit_buffer *ab;
 
+	if (!audit_enabled)
+		return;
+
 	ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
 	if (!ab)
 		return;

kernel/sysctl.c

@@ -81,7 +81,6 @@ extern int percpu_pagelist_fraction;
 extern int compat_log;
 extern int maps_protect;
 extern int sysctl_stat_interval;
-extern int audit_argv_kb;
 extern int latencytop_enabled;
 
 /* Constants used for minimum and  maximum */
@@ -390,16 +389,6 @@ static struct ctl_table kern_table[] = {
 		.mode		= 0644,
 		.proc_handler	= &proc_dointvec,
 	},
-#ifdef CONFIG_AUDITSYSCALL
-	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "audit_argv_kb",
-		.data		= &audit_argv_kb,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
-	},
-#endif
 	{
 		.ctl_name	= KERN_CORE_PATTERN,
 		.procname	= "core_pattern",

net/core/dev.c

@@ -2752,12 +2752,15 @@ static void __dev_set_promiscuity(struct net_device *dev, int inc)
 		printk(KERN_INFO "device %s %s promiscuous mode\n",
 		       dev->name, (dev->flags & IFF_PROMISC) ? "entered" :
 							       "left");
-		audit_log(current->audit_context, GFP_ATOMIC,
-			AUDIT_ANOM_PROMISCUOUS,
-			"dev=%s prom=%d old_prom=%d auid=%u",
-			dev->name, (dev->flags & IFF_PROMISC),
-			(old_flags & IFF_PROMISC),
-			audit_get_loginuid(current->audit_context));
+		if (audit_enabled)
+			audit_log(current->audit_context, GFP_ATOMIC,
+				AUDIT_ANOM_PROMISCUOUS,
+				"dev=%s prom=%d old_prom=%d auid=%u uid=%u gid=%u ses=%u",
+				dev->name, (dev->flags & IFF_PROMISC),
+				(old_flags & IFF_PROMISC),
+				audit_get_loginuid(current),
+				current->uid, current->gid,
+				audit_get_sessionid(current));
 
 		if (dev->change_rx_flags)
 			dev->change_rx_flags(dev, IFF_PROMISC);

net/key/af_key.c

@@ -1466,7 +1466,7 @@ static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr,
 		err = xfrm_state_update(x);
 
 	xfrm_audit_state_add(x, err ? 0 : 1,
-			     audit_get_loginuid(current->audit_context), 0);
+			     audit_get_loginuid(current), 0);
 
 	if (err < 0) {
 		x->km.state = XFRM_STATE_DEAD;
@@ -1520,7 +1520,7 @@ static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
 	km_state_notify(x, &c);
 out:
 	xfrm_audit_state_delete(x, err ? 0 : 1,
-			       audit_get_loginuid(current->audit_context), 0);
+			       audit_get_loginuid(current), 0);
 	xfrm_state_put(x);
 
 	return err;
@@ -1695,7 +1695,7 @@ static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hd
 	if (proto == 0)
 		return -EINVAL;
 
-	audit_info.loginuid = audit_get_loginuid(current->audit_context);
+	audit_info.loginuid = audit_get_loginuid(current);
 	audit_info.secid = 0;
 	err = xfrm_state_flush(proto, &audit_info);
 	if (err)
@@ -2273,7 +2273,7 @@ static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
 				 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
 
 	xfrm_audit_policy_add(xp, err ? 0 : 1,
-			     audit_get_loginuid(current->audit_context), 0);
+			     audit_get_loginuid(current), 0);
 
 	if (err)
 		goto out;
@@ -2356,7 +2356,7 @@ static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg
 		return -ENOENT;
 
 	xfrm_audit_policy_delete(xp, err ? 0 : 1,
-				audit_get_loginuid(current->audit_context), 0);
+				audit_get_loginuid(current), 0);
 
 	if (err)
 		goto out;
@@ -2617,7 +2617,7 @@ static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
 
 	if (delete) {
 		xfrm_audit_policy_delete(xp, err ? 0 : 1,
-				audit_get_loginuid(current->audit_context), 0);
+				audit_get_loginuid(current), 0);
 
 		if (err)
 			goto out;
@@ -2694,7 +2694,7 @@ static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg
 	struct xfrm_audit audit_info;
 	int err;
 
-	audit_info.loginuid = audit_get_loginuid(current->audit_context);
+	audit_info.loginuid = audit_get_loginuid(current);
 	audit_info.secid = 0;
 	err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
 	if (err)

net/netlink/af_netlink.c

@@ -1238,7 +1238,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 
 	NETLINK_CB(skb).pid	= nlk->pid;
 	NETLINK_CB(skb).dst_group = dst_group;
-	NETLINK_CB(skb).loginuid = audit_get_loginuid(current->audit_context);
+	NETLINK_CB(skb).loginuid = audit_get_loginuid(current);
 	selinux_get_task_sid(current, &(NETLINK_CB(skb).sid));
 	memcpy(NETLINK_CREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
 

net/xfrm/xfrm_state.c

@@ -493,7 +493,7 @@ expired:
 		km_state_expired(x, 1, 0);
 
 	xfrm_audit_state_delete(x, err ? 0 : 1,
-				audit_get_loginuid(current->audit_context), 0);
+				audit_get_loginuid(current), 0);
 
 out:
 	spin_unlock(&x->lock);

security/selinux/selinuxfs.c

@@ -172,9 +172,10 @@ static ssize_t sel_write_enforce(struct file * file, const char __user * buf,
 		if (length)
 			goto out;
 		audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
-			"enforcing=%d old_enforcing=%d auid=%u", new_value, 
-			selinux_enforcing,
-			audit_get_loginuid(current->audit_context));
+			"enforcing=%d old_enforcing=%d auid=%u ses=%u",
+			new_value, selinux_enforcing,
+			audit_get_loginuid(current),
+			audit_get_sessionid(current));
 		selinux_enforcing = new_value;
 		if (selinux_enforcing)
 			avc_ss_reset(0);
@@ -243,8 +244,9 @@ static ssize_t sel_write_disable(struct file * file, const char __user * buf,
 		if (length < 0)
 			goto out;
 		audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
-			"selinux=0 auid=%u",
-			audit_get_loginuid(current->audit_context));
+			"selinux=0 auid=%u ses=%u",
+			audit_get_loginuid(current),
+			audit_get_sessionid(current));
 	}
 
 	length = count;
@@ -356,8 +358,9 @@ out1:
 		(security_get_allow_unknown() ? "allow" : "deny")));
 
 	audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
-		"policy loaded auid=%u",
-		audit_get_loginuid(current->audit_context));
+		"policy loaded auid=%u ses=%u",
+		audit_get_loginuid(current),
+		audit_get_sessionid(current));
 out:
 	mutex_unlock(&sel_mutex);
 	vfree(data);

security/selinux/ss/services.c

@@ -1905,11 +1905,12 @@ int security_set_bools(int len, int *values)
 		if (!!values[i] != policydb.bool_val_to_struct[i]->state) {
 			audit_log(current->audit_context, GFP_ATOMIC,
 				AUDIT_MAC_CONFIG_CHANGE,
-				"bool=%s val=%d old_val=%d auid=%u",
+				"bool=%s val=%d old_val=%d auid=%u ses=%u",
 				policydb.p_bool_val_to_name[i],
 				!!values[i],
 				policydb.bool_val_to_struct[i]->state,
-				audit_get_loginuid(current->audit_context));
+				audit_get_loginuid(current),
+				audit_get_sessionid(current));
 		}
 		if (values[i]) {
 			policydb.bool_val_to_struct[i]->state = 1;