[PATCH 2/3] tty: rocket: fix invalid user-pointer checks
From: Johan Hovold <johan@kernel.org>
Date: 2016-11-08 12:25:14
Also in:
lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Drop invalid user-pointer checks from custom ioctl handlers. A NULL-pointer can be valid in user space and copy_to_user() takes care of sanity checking. Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/tty/rocket.c | 4 ---- 1 file changed, 4 deletions(-)
diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c
index b0cc47c77b40..d66c1edd9892 100644
--- a/drivers/tty/rocket.c
+++ b/drivers/tty/rocket.c@@ -1189,8 +1189,6 @@ static int get_config(struct r_port *info, struct rocket_config __user *retinfo) { struct rocket_config tmp; - if (!retinfo) - return -EFAULT; memset(&tmp, 0, sizeof (tmp)); mutex_lock(&info->port.mutex); tmp.line = info->line;
@@ -1255,8 +1253,6 @@ static int get_ports(struct r_port *info, struct rocket_ports __user *retports) struct rocket_ports tmp; int board; - if (!retports) - return -EFAULT; memset(&tmp, 0, sizeof (tmp)); tmp.tty_major = rocket_driver->major;
--
2.7.3