1 files changed, 14 insertions, 7 deletions

diff --git a/net/ax25/ax25_uid.c b/net/ax25/ax25_uid.c
index e3c579ba6325..957999e43ff7 100644
--- a/net/ax25/ax25_uid.c
+++ b/net/ax25/ax25_uid.c
@@ -51,14 +51,14 @@ int ax25_uid_policy;
 
 EXPORT_SYMBOL(ax25_uid_policy);
 
-ax25_uid_assoc *ax25_findbyuid(uid_t uid)
+ax25_uid_assoc *ax25_findbyuid(kuid_t uid)
 {
 	ax25_uid_assoc *ax25_uid, *res = NULL;
 	struct hlist_node *node;
 
 	read_lock(&ax25_uid_lock);
 	ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) {
-		if (ax25_uid->uid == uid) {
+		if (uid_eq(ax25_uid->uid, uid)) {
 			ax25_uid_hold(ax25_uid);
 			res = ax25_uid;
 			break;
@@ -84,7 +84,7 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
 		read_lock(&ax25_uid_lock);
 		ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) {
 			if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0) {
-				res = ax25_uid->uid;
+				res = from_kuid_munged(current_user_ns(), ax25_uid->uid);
 				break;
 			}
 		}
@@ -93,9 +93,14 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
 		return res;
 
 	case SIOCAX25ADDUID:
+	{
+		kuid_t sax25_kuid;
 		if (!capable(CAP_NET_ADMIN))
 			return -EPERM;
-		user = ax25_findbyuid(sax->sax25_uid);
+		sax25_kuid = make_kuid(current_user_ns(), sax->sax25_uid);
+		if (!uid_valid(sax25_kuid))
+			return -EINVAL;
+		user = ax25_findbyuid(sax25_kuid);
 		if (user) {
 			ax25_uid_put(user);
 			return -EEXIST;
@@ -106,7 +111,7 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
 			return -ENOMEM;
 
 		atomic_set(&ax25_uid->refcount, 1);
-		ax25_uid->uid  = sax->sax25_uid;
+		ax25_uid->uid  = sax25_kuid;
 		ax25_uid->call = sax->sax25_call;
 
 		write_lock(&ax25_uid_lock);
@@ -114,7 +119,7 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
 		write_unlock(&ax25_uid_lock);
 
 		return 0;
-
+	}
 	case SIOCAX25DELUID:
 		if (!capable(CAP_NET_ADMIN))
 			return -EPERM;
@@ -172,7 +177,9 @@ static int ax25_uid_seq_show(struct seq_file *seq, void *v)
 		struct ax25_uid_assoc *pt;
 
 		pt = hlist_entry(v, struct ax25_uid_assoc, uid_node);
-		seq_printf(seq, "%6d %s\n", pt->uid, ax2asc(buf, &pt->call));
+		seq_printf(seq, "%6d %s\n",
+			from_kuid_munged(seq_user_ns(seq), pt->uid),
+			ax2asc(buf, &pt->call));
 	}
 	return 0;
 }