diff --git a/fs/namespace.c b/fs/namespace.c
index d2db7df..9d33909 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1713,8 +1713,6 @@
 {
 	struct mount *mnt = real_mount(path->mnt);
 
-	if (flags & ~(MNT_FORCE | MNT_DETACH | MNT_EXPIRE | UMOUNT_NOFOLLOW))
-		return -EINVAL;
 	if (!may_mount())
 		return -EPERM;
 	if (path->dentry != path->mnt->mnt_root)
@@ -1728,6 +1726,7 @@
 	return 0;
 }
 
+// caller is responsible for flags being sane
 int path_umount(struct path *path, int flags)
 {
 	struct mount *mnt = real_mount(path->mnt);
@@ -1749,6 +1748,10 @@
 	struct path path;
 	int ret;
 
+	// basic validity checks done first
+	if (flags & ~(MNT_FORCE | MNT_DETACH | MNT_EXPIRE | UMOUNT_NOFOLLOW))
+		return -EINVAL;
+
 	if (!(flags & UMOUNT_NOFOLLOW))
 		lookup_flags |= LOOKUP_FOLLOW;
 	ret = user_path_at(AT_FDCWD, name, lookup_flags, &path);
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 1635111..a21e6a5 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -1658,7 +1658,7 @@
 		(const struct compat_iovec __user *)uvec;
 	int ret = -EFAULT, i;
 
-	if (!user_access_begin(uvec, nr_segs * sizeof(*uvec)))
+	if (!user_access_begin(uiov, nr_segs * sizeof(*uiov)))
 		return -EFAULT;
 
 	for (i = 0; i < nr_segs; i++) {
diff --git a/security/lsm_audit.c b/security/lsm_audit.c
index 7d8026f..a0cd28c 100644
--- a/security/lsm_audit.c
+++ b/security/lsm_audit.c
@@ -275,7 +275,9 @@
 		struct inode *inode;
 
 		audit_log_format(ab, " name=");
+		spin_lock(&a->u.dentry->d_lock);
 		audit_log_untrustedstring(ab, a->u.dentry->d_name.name);
+		spin_unlock(&a->u.dentry->d_lock);
 
 		inode = d_backing_inode(a->u.dentry);
 		if (inode) {
@@ -293,8 +295,9 @@
 		dentry = d_find_alias(inode);
 		if (dentry) {
 			audit_log_format(ab, " name=");
-			audit_log_untrustedstring(ab,
-					 dentry->d_name.name);
+			spin_lock(&dentry->d_lock);
+			audit_log_untrustedstring(ab, dentry->d_name.name);
+			spin_unlock(&dentry->d_lock);
 			dput(dentry);
 		}
 		audit_log_format(ab, " dev=");