TTY: pty, stop passing NULL to free_tty_struct
In case alloc_tty_struct fails in pty_common_install, we pass NULL to
free_tty_struct. This is invalid as the function is not ready to cope
with that. And even if it was, it is not nice to do that anyway.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 4399f1d..d9ea9e2 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -303,9 +303,11 @@
int retval = -ENOMEM;
o_tty = alloc_tty_struct();
+ if (!o_tty)
+ goto err;
ports[0] = kmalloc(sizeof **ports, GFP_KERNEL);
ports[1] = kmalloc(sizeof **ports, GFP_KERNEL);
- if (!o_tty || !ports[0] || !ports[1])
+ if (!ports[0] || !ports[1])
goto err_free_tty;
if (!try_module_get(driver->other->owner)) {
/* This cannot in fact currently happen */
@@ -360,6 +362,7 @@
kfree(ports[0]);
kfree(ports[1]);
free_tty_struct(o_tty);
+err:
return retval;
}