From: "Bernat, Yehezkel" <yehezkel.bernat@intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andreas Noever <andreas.noever@gmail.com>,
Michael Jamet <michael.jamet@intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Lukas Wunner <lukas@wunner.de>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] thunderbolt: Make key root-only accessible
Date: Tue, 15 Aug 2017 08:19:12 +0300 [thread overview]
Message-ID: <578605f4-3927-1fdb-1f64-c8f582fd29b8@intel.com> (raw)
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>
---
drivers/thunderbolt/switch.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 69fde0b..8510abc 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -826,7 +826,7 @@ static ssize_t key_store(struct device *dev, struct device_attribute *attr,
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)
--
2.7.4
next reply other threads:[~2017-08-15 5:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-15 5:19 Bernat, Yehezkel [this message]
2017-08-15 7:03 ` Mika Westerberg
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