pty: make ptmx file ops read-only after init

The ptmx_fops structure is only changed during init, so mark it as such. Signed-off-by: Kees Cook <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
Mic92 · Sep 15, 2016 · d2ec3f7 · d2ec3f7
1 parent a727b02
commit d2ec3f7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
@@ -800,7 +800,7 @@ static int ptmx_open(struct inode *inode, struct file *filp)
 	return retval;
 }
 
-static struct file_operations ptmx_fops;
+static struct file_operations ptmx_fops __ro_after_init;
 
 static void __init unix98_pty_init(void)
 {