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authorJohan Hovold <johan@kernel.org>2016-11-08 13:28:23 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-10 13:16:57 +0100
commit04cbf3832bbe21ac473e6b79571fce0c7f10a087 (patch)
treeb03542fc91cc1ec9ea16051a6b3f267b9a4bfb19 /drivers/usb/class
parent11f107f708fd853bf48d5b0f8bb886e42fa009e3 (diff)
downloadlinux-04cbf3832bbe21ac473e6b79571fce0c7f10a087.tar.bz2
USB: cdc-acm: fix invalid user-pointer check
Drop invalid user-pointer check from TIOCGSERIAL handler. 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> Acked-by: Oliver Neukum <oneukum@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class')
-rw-r--r--drivers/usb/class/cdc-acm.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 78f0f85bebdc..5535377f540e 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -877,9 +877,6 @@ static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
{
struct serial_struct tmp;
- if (!info)
- return -EINVAL;
-
memset(&tmp, 0, sizeof(tmp));
tmp.flags = ASYNC_LOW_LATENCY;
tmp.xmit_fifo_size = acm->writesize;