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USB: cdc-acm: fix invalid user-pointer check

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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>
This commit is contained in:
Johan Hovold 2016-11-08 13:28:23 +01:00 committed by Greg Kroah-Hartman
parent 11f107f708
commit 04cbf3832b
1 changed files with 0 additions and 3 deletions
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3
drivers/usb/class/cdc-acm.c
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@ -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;