1 files changed, 8 insertions, 1 deletions

diff --git a/fs/namei.c b/fs/namei.c
index 863166441bf3..432d6bc6fab0 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -227,10 +227,10 @@ int generic_permission(struct inode *inode, int mask,
 
 int permission(struct inode *inode, int mask, struct nameidata *nd)
 {
+        umode_t mode = inode->i_mode;
         int retval, submask;
 
         if (mask & MAY_WRITE) {
-                umode_t mode = inode->i_mode;
 
                 /*
                  * Nobody gets write access to a read-only fs.
@@ -247,6 +247,13 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
         }
 
 
+        /*
+         * MAY_EXEC on regular files requires special handling: We override
+         * filesystem execute permissions if the mode bits aren't set.
+         */
+        if ((mask & MAY_EXEC) && S_ISREG(mode) && !(mode & S_IXUGO))
+                return -EACCES;
+
         /* Ordinary permission routines do not understand MAY_APPEND. */
         submask = mask & ~MAY_APPEND;
         if (inode->i_op && inode->i_op->permission)