Author: hselasky
Date: Fri Oct 20 10:01:21 2017
New Revision: 324798
URL: https://svnweb.freebsd.org/changeset/base/324798
Log:
MFC r323916:
Extend sysctl description for hw.usb.disable_enumeration .
PR: 222505
Submitted by: Julian H. Stacey <j...@berklix.com>
Sponsored by: Mellanox Technologies
Modified:
stable/10/sys/dev/usb/usb_hub.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/usb/usb_hub.c
==============================================================================
--- stable/10/sys/dev/usb/usb_hub.c Fri Oct 20 09:59:39 2017
(r324797)
+++ stable/10/sys/dev/usb/usb_hub.c Fri Oct 20 10:01:21 2017
(r324798)
@@ -101,7 +101,9 @@ SYSCTL_INT(_hw_usb, OID_AUTO, power_timeout, CTLFLAG_R
#if USB_HAVE_DISABLE_ENUM
static int usb_disable_enumeration = 0;
SYSCTL_INT(_hw_usb, OID_AUTO, disable_enumeration, CTLFLAG_RWTUN,
- &usb_disable_enumeration, 0, "Set to disable all USB device enumeration.");
+ &usb_disable_enumeration, 0, "Set to disable all USB device enumeration. "
+ "This can secure against USB devices turning evil, "
+ "for example a USB memory stick becoming a USB keyboard.");
TUNABLE_INT("hw.usb.disable_enumeration", &usb_disable_enumeration);
static int usb_disable_port_power = 0;
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