Merge with /usr/src/ntfs-2.6.git

2 files changed, 91 insertions, 49 deletions

diff --git a/kernel/audit.c b/kernel/audit.c
index ac26d4d..9c4f1af 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1,4 +1,4 @@
-/* audit.c -- Auditing support -*- linux-c -*-
+/* audit.c -- Auditing support
  * Gateway between the kernel (e.g., selinux) and the user-space audit daemon.
  * System-call specific features have moved to auditsc.c
  *
@@ -38,7 +38,7 @@
  *	  6) Support low-overhead kernel-based filtering to minimize the
  *	     information that must be passed to user-space.
  *
- * Example user-space utilities: http://people.redhat.com/faith/audit/
+ * Example user-space utilities: http://people.redhat.com/sgrubb/audit/
  */
 
 #include <linux/init.h>
@@ -142,7 +142,6 @@ struct audit_buffer {
 	int		     total;
 	int		     type;
 	int		     pid;
-	int		     count; /* Times requeued */
 };
 
 void audit_set_type(struct audit_buffer *ab, int type)
@@ -239,36 +238,36 @@ void audit_log_lost(const char *message)
 
 }
 
-static int audit_set_rate_limit(int limit)
+static int audit_set_rate_limit(int limit, uid_t loginuid)
 {
 	int old		 = audit_rate_limit;
 	audit_rate_limit = limit;
-	audit_log(current->audit_context, "audit_rate_limit=%d old=%d",
-		  audit_rate_limit, old);
+	audit_log(NULL, "audit_rate_limit=%d old=%d by auid %u",
+			audit_rate_limit, old, loginuid);
 	return old;
 }
 
-static int audit_set_backlog_limit(int limit)
+static int audit_set_backlog_limit(int limit, uid_t loginuid)
 {
 	int old		 = audit_backlog_limit;
 	audit_backlog_limit = limit;
-	audit_log(current->audit_context, "audit_backlog_limit=%d old=%d",
-		  audit_backlog_limit, old);
+	audit_log(NULL, "audit_backlog_limit=%d old=%d by auid %u",
+			audit_backlog_limit, old, loginuid);
 	return old;
 }
 
-static int audit_set_enabled(int state)
+static int audit_set_enabled(int state, uid_t loginuid)
 {
 	int old		 = audit_enabled;
 	if (state != 0 && state != 1)
 		return -EINVAL;
 	audit_enabled = state;
-	audit_log(current->audit_context, "audit_enabled=%d old=%d",
-		  audit_enabled, old);
+	audit_log(NULL, "audit_enabled=%d old=%d by auid %u",
+		  audit_enabled, old, loginuid);
 	return old;
 }
 
-static int audit_set_failure(int state)
+static int audit_set_failure(int state, uid_t loginuid)
 {
 	int old		 = audit_failure;
 	if (state != AUDIT_FAIL_SILENT
@@ -276,8 +275,8 @@ static int audit_set_failure(int state)
 	    && state != AUDIT_FAIL_PANIC)
 		return -EINVAL;
 	audit_failure = state;
-	audit_log(current->audit_context, "audit_failure=%d old=%d",
-		  audit_failure, old);
+	audit_log(NULL, "audit_failure=%d old=%d by auid %u",
+		  audit_failure, old, loginuid);
 	return old;
 }
 
@@ -344,6 +343,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	int			err;
 	struct audit_buffer	*ab;
 	u16			msg_type = nlh->nlmsg_type;
+	uid_t			loginuid; /* loginuid of sender */
 
 	err = audit_netlink_ok(NETLINK_CB(skb).eff_cap, msg_type);
 	if (err)
@@ -351,6 +351,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 
 	pid  = NETLINK_CREDS(skb)->pid;
 	uid  = NETLINK_CREDS(skb)->uid;
+	loginuid = NETLINK_CB(skb).loginuid;
 	seq  = nlh->nlmsg_seq;
 	data = NLMSG_DATA(nlh);
 
@@ -371,34 +372,36 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 			return -EINVAL;
 		status_get   = (struct audit_status *)data;
 		if (status_get->mask & AUDIT_STATUS_ENABLED) {
-			err = audit_set_enabled(status_get->enabled);
+			err = audit_set_enabled(status_get->enabled, loginuid);
 			if (err < 0) return err;
 		}
 		if (status_get->mask & AUDIT_STATUS_FAILURE) {
-			err = audit_set_failure(status_get->failure);
+			err = audit_set_failure(status_get->failure, loginuid);
 			if (err < 0) return err;
 		}
 		if (status_get->mask & AUDIT_STATUS_PID) {
 			int old   = audit_pid;
 			audit_pid = status_get->pid;
-			audit_log(current->audit_context,
-				  "audit_pid=%d old=%d", audit_pid, old);
+			audit_log(NULL, "audit_pid=%d old=%d by auid %u",
+				  audit_pid, old, loginuid);
 		}
 		if (status_get->mask & AUDIT_STATUS_RATE_LIMIT)
-			audit_set_rate_limit(status_get->rate_limit);
+			audit_set_rate_limit(status_get->rate_limit, loginuid);
 		if (status_get->mask & AUDIT_STATUS_BACKLOG_LIMIT)
-			audit_set_backlog_limit(status_get->backlog_limit);
+			audit_set_backlog_limit(status_get->backlog_limit,
+							loginuid);
 		break;
 	case AUDIT_USER:
 		ab = audit_log_start(NULL);
 		if (!ab)
 			break;	/* audit_panic has been called */
 		audit_log_format(ab,
-				 "user pid=%d uid=%d length=%d msg='%.1024s'",
+				 "user pid=%d uid=%d length=%d loginuid=%u"
+				 " msg='%.1024s'",
 				 pid, uid,
 				 (int)(nlh->nlmsg_len
 				       - ((char *)data - (char *)nlh)),
-				 (char *)data);
+				 loginuid, (char *)data);
 		ab->type = AUDIT_USER;
 		ab->pid  = pid;
 		audit_log_end(ab);
@@ -411,7 +414,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	case AUDIT_LIST:
 #ifdef CONFIG_AUDITSYSCALL
 		err = audit_receive_filter(nlh->nlmsg_type, NETLINK_CB(skb).pid,
-					   uid, seq, data);
+					   uid, seq, data, loginuid);
 #else
 		err = -EOPNOTSUPP;
 #endif
@@ -480,7 +483,7 @@ static void audit_log_move(struct audit_buffer *ab)
 	if (ab->len == 0)
 		return;
 
-	skb = skb_peek(&ab->sklist);
+	skb = skb_peek_tail(&ab->sklist);
 	if (!skb || skb_tailroom(skb) <= ab->len + extra) {
 		skb = alloc_skb(2 * ab->len + extra, GFP_ATOMIC);
 		if (!skb) {
@@ -519,9 +522,9 @@ static inline int audit_log_drain(struct audit_buffer *ab)
 			retval = netlink_unicast(audit_sock, skb, audit_pid,
 						 MSG_DONTWAIT);
 		}
-		if (retval == -EAGAIN && ab->count < 5) {
-			++ab->count;
-			skb_queue_tail(&ab->sklist, skb);
+		if (retval == -EAGAIN &&
+		    (atomic_read(&audit_backlog)) < audit_backlog_limit) {
+			skb_queue_head(&ab->sklist, skb);
 			audit_log_end_irq(ab);
 			return 1;
 		}
@@ -537,8 +540,8 @@ static inline int audit_log_drain(struct audit_buffer *ab)
 		if (!audit_pid) { /* No daemon */
 			int offset = ab->nlh ? NLMSG_SPACE(0) : 0;
 			int len    = skb->len - offset;
-			printk(KERN_ERR "%*.*s\n",
-			       len, len, skb->data + offset);
+			skb->data[offset + len] = '\0';
+			printk(KERN_ERR "%s\n", skb->data + offset);
 		}
 		kfree_skb(skb);
 		ab->nlh = NULL;
@@ -617,7 +620,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx)
 	struct audit_buffer	*ab	= NULL;
 	unsigned long		flags;
 	struct timespec		t;
-	int			serial	= 0;
+	unsigned int		serial;
 
 	if (!audit_initialized)
 		return NULL;
@@ -659,15 +662,16 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx)
 	ab->total = 0;
 	ab->type  = AUDIT_KERNEL;
 	ab->pid   = 0;
-	ab->count = 0;
 
 #ifdef CONFIG_AUDITSYSCALL
 	if (ab->ctx)
 		audit_get_stamp(ab->ctx, &t, &serial);
 	else
 #endif
+	{
 		t = CURRENT_TIME;
-
+		serial = 0;
+	}
 	audit_log_format(ab, "audit(%lu.%03lu:%u): ",
 			 t.tv_sec, t.tv_nsec/1000000, serial);
 	return ab;
@@ -717,6 +721,29 @@ void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
 	va_end(args);
 }
 
+void audit_log_hex(struct audit_buffer *ab, const unsigned char *buf, size_t len)
+{
+	int i;
+
+	for (i=0; i<len; i++)
+		audit_log_format(ab, "%02x", buf[i]);
+}
+
+void audit_log_untrustedstring(struct audit_buffer *ab, const char *string)
+{
+	const unsigned char *p = string;
+
+	while (*p) {
+		if (*p == '"' || *p == ' ' || *p < 0x20 || *p > 0x7f) {
+			audit_log_hex(ab, string, strlen(string));
+			return;
+		}
+		p++;
+	}
+	audit_log_format(ab, "\"%s\"", string);
+}
+
+
 /* This is a helper-function to print the d_path without using a static
  * buffer or allocating another buffer in addition to the one in
  * audit_buffer. */
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 6f19313..37b3ac9 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1,4 +1,4 @@
-/* auditsc.c -- System-call auditing support -*- linux-c -*-
+/* auditsc.c -- System-call auditing support
  * Handles all system-call specific auditing features.
  *
  * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
@@ -123,7 +123,7 @@ struct audit_context {
 	int		    major;      /* syscall number */
 	unsigned long	    argv[4];    /* syscall arguments */
 	int		    return_valid; /* return code is valid */
-	int		    return_code;/* syscall return code */
+	long		    return_code;/* syscall return code */
 	int		    auditable;  /* 1 if record should be written */
 	int		    name_count;
 	struct audit_names  names[AUDIT_NAMES];
@@ -135,6 +135,7 @@ struct audit_context {
 	uid_t		    uid, euid, suid, fsuid;
 	gid_t		    gid, egid, sgid, fsgid;
 	unsigned long	    personality;
+	int		    arch;
 
 #if AUDIT_DEBUG
 	int		    put_count;
@@ -250,7 +251,8 @@ static int audit_copy_rule(struct audit_rule *d, struct audit_rule *s)
 	return 0;
 }
 
-int audit_receive_filter(int type, int pid, int uid, int seq, void *data)
+int audit_receive_filter(int type, int pid, int uid, int seq, void *data,
+							uid_t loginuid)
 {
 	u32		   flags;
 	struct audit_entry *entry;
@@ -285,6 +287,7 @@ int audit_receive_filter(int type, int pid, int uid, int seq, void *data)
 			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);
 		break;
 	case AUDIT_DEL:
 		flags =((struct audit_rule *)data)->flags;
@@ -294,6 +297,7 @@ int audit_receive_filter(int type, int pid, int uid, int seq, void *data)
 			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);
 		break;
 	default:
 		return -EINVAL;
@@ -348,6 +352,10 @@ static int audit_filter_rules(struct task_struct *tsk,
 		case AUDIT_PERS:
 			result = (tsk->personality == value);
 			break;
+		case AUDIT_ARCH:
+			if (ctx) 
+				result = (ctx->arch == value);
+			break;
 
 		case AUDIT_EXIT:
 			if (ctx && ctx->return_valid)
@@ -355,7 +363,7 @@ static int audit_filter_rules(struct task_struct *tsk,
 			break;
 		case AUDIT_SUCCESS:
 			if (ctx && ctx->return_valid)
-				result = (ctx->return_code >= 0);
+				result = (ctx->return_valid == AUDITSC_SUCCESS);
 			break;
 		case AUDIT_DEVMAJOR:
 			if (ctx) {
@@ -648,8 +656,11 @@ static void audit_log_exit(struct audit_context *context)
 	audit_log_format(ab, "syscall=%d", context->major);
 	if (context->personality != PER_LINUX)
 		audit_log_format(ab, " per=%lx", context->personality);
+	audit_log_format(ab, " arch=%x", context->arch);
 	if (context->return_valid)
-		audit_log_format(ab, " exit=%d", context->return_code);
+		audit_log_format(ab, " success=%s exit=%ld", 
+				 (context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
+				 context->return_code);
 	audit_log_format(ab,
 		  " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
 		  " pid=%d loginuid=%d uid=%d gid=%d"
@@ -696,9 +707,10 @@ static void audit_log_exit(struct audit_context *context)
 		if (!ab)
 			continue; /* audit_panic has been called */
 		audit_log_format(ab, "item=%d", i);
-		if (context->names[i].name)
-			audit_log_format(ab, " name=%s",
-					 context->names[i].name);
+		if (context->names[i].name) {
+			audit_log_format(ab, " name=");
+			audit_log_untrustedstring(ab, context->names[i].name);
+		}
 		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",
@@ -772,7 +784,7 @@ static inline unsigned int audit_serial(void)
  * then the record will be written at syscall exit time (otherwise, it
  * will only be written if another part of the kernel requests that it
  * be written). */
-void audit_syscall_entry(struct task_struct *tsk, int major,
+void audit_syscall_entry(struct task_struct *tsk, int arch, int major,
 			 unsigned long a1, unsigned long a2,
 			 unsigned long a3, unsigned long a4)
 {
@@ -826,6 +838,7 @@ void audit_syscall_entry(struct task_struct *tsk, int major,
 	if (!audit_enabled)
 		return;
 
+	context->arch	    = arch;
 	context->major      = major;
 	context->argv[0]    = a1;
 	context->argv[1]    = a2;
@@ -849,13 +862,13 @@ void audit_syscall_entry(struct task_struct *tsk, int major,
  * filtering, or because some other part of the kernel write an audit
  * message), then write out the syscall information.  In call cases,
  * free the names stored from getname(). */
-void audit_syscall_exit(struct task_struct *tsk, int return_code)
+void audit_syscall_exit(struct task_struct *tsk, int valid, long return_code)
 {
 	struct audit_context *context;
 
 	get_task_struct(tsk);
 	task_lock(tsk);
-	context = audit_get_context(tsk, 1, return_code);
+	context = audit_get_context(tsk, valid, return_code);
 	task_unlock(tsk);
 
 	/* Not having a context here is ok, since the parent may have
@@ -868,6 +881,7 @@ void audit_syscall_exit(struct task_struct *tsk, int return_code)
 
 	context->in_syscall = 0;
 	context->auditable  = 0;
+
 	if (context->previous) {
 		struct audit_context *new_context = context->previous;
 		context->previous  = NULL;
@@ -981,7 +995,7 @@ void audit_inode(const char *name, const struct inode *inode)
 }
 
 void audit_get_stamp(struct audit_context *ctx,
-		     struct timespec *t, int *serial)
+		     struct timespec *t, unsigned int *serial)
 {
 	if (ctx) {
 		t->tv_sec  = ctx->ctime.tv_sec;
@@ -996,20 +1010,21 @@ void audit_get_stamp(struct audit_context *ctx,
 
 extern int audit_set_type(struct audit_buffer *ab, int type);
 
-int audit_set_loginuid(struct audit_context *ctx, uid_t loginuid)
+int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
 {
-	if (ctx) {
+	if (task->audit_context) {
 		struct audit_buffer *ab;
 
 		ab = audit_log_start(NULL);
 		if (ab) {
 			audit_log_format(ab, "login pid=%d uid=%u "
 				"old loginuid=%u new loginuid=%u",
-				ctx->pid, ctx->uid, ctx->loginuid, loginuid);
+				task->pid, task->uid, 
+				task->audit_context->loginuid, loginuid);
 			audit_set_type(ab, AUDIT_LOGIN);
 			audit_log_end(ab);
 		}
-		ctx->loginuid = loginuid;
+		task->audit_context->loginuid = loginuid;
 	}
 	return 0;
 }