| From 0956e41169222822d3557871fcd1d32e4fa7e934 Mon Sep 17 00:00:00 2001 |
| From: "Bernat, Yehezkel" <yehezkel.bernat@intel.com> |
| Date: Tue, 15 Aug 2017 08:19:12 +0300 |
| Subject: thunderbolt: Make key root-only accessible |
| |
| From: Bernat, Yehezkel <yehezkel.bernat@intel.com> |
| |
| commit 0956e41169222822d3557871fcd1d32e4fa7e934 upstream. |
| |
| Non-root user may read the key back after root wrote it there. |
| This removes read access to everyone but root. |
| |
| Signed-off-by: Yehezkel Bernat <yehezkel.bernat@intel.com> |
| Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/thunderbolt/switch.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/drivers/thunderbolt/switch.c |
| +++ b/drivers/thunderbolt/switch.c |
| @@ -826,7 +826,7 @@ static ssize_t key_store(struct device * |
| mutex_unlock(&switch_lock); |
| return ret; |
| } |
| -static DEVICE_ATTR_RW(key); |
| +static DEVICE_ATTR(key, 0600, key_show, key_store); |
| |
| static ssize_t nvm_authenticate_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
