diff --git a/fs/namei.c b/fs/namei.c
index 723a3fe..e0624e2 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -181,7 +181,7 @@
 	int (*check_acl)(struct inode *inode, int mask, unsigned int flags);
 	unsigned int mode = inode->i_mode;
 
-	mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
+	mask &= MAY_READ | MAY_WRITE | MAY_EXEC | MAY_NOT_BLOCK;
 
 	if (current_user_ns() != inode_userns(inode))
 		goto other_perms;
@@ -204,7 +204,7 @@
 	/*
 	 * If the DACs are ok we don't need any capability check.
 	 */
-	if ((mask & ~mode) == 0)
+	if ((mask & ~mode & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
 		return 0;
 	return -EACCES;
 }