diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 6dcef089e18e715f0b38d5ad7de1c05f0845fc13..49dfb2ab783e6f921fdd344f1b6c39ee29cd1935 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -192,7 +192,7 @@ int proc_fill_super(struct super_block *s, void *data, int silent)
 {
 	struct inode * root_inode;
 
-	s->s_flags |= MS_NODIRATIME;
+	s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC;
 	s->s_blocksize = 1024;
 	s->s_blocksize_bits = 10;
 	s->s_magic = PROC_SUPER_MAGIC;