From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johan Hovold Subject: [PATCH 2/3] tty: rocket: fix invalid user-pointer checks Date: Tue, 8 Nov 2016 13:24:54 +0100 Message-ID: <1478607895-23447-3-git-send-email-johan@kernel.org> References: <1478607895-23447-1-git-send-email-johan@kernel.org> Return-path: In-Reply-To: <1478607895-23447-1-git-send-email-johan@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Greg Kroah-Hartman Cc: Jiri Slaby , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold List-Id: linux-serial@vger.kernel.org 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 --- 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