[char-misc 3.10 backport] mei: bus: fix possible boundaries violation

[char-misc 3.10 backport] mei: bus: fix possible boundaries violation

[Tomas Winkler]

From: Alexander Usyskin <alexander.usyskin@intel.com>

commit cfda2794b5afe7ce64ee9605c64bef0e56a48125 upstream.

function 'strncpy' will fill whole buffer 'id.name' of fixed size (32)
with string value and will not leave place for NULL-terminator.
Possible buffer boundaries violation in following string operations.
Replace strncpy with strlcpy.

Cc: stable@vger.kernel.org # 3.10
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/misc/mei/bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 99cc0b07a713..0513ea0906dd 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -71,7 +71,7 @@ static int mei_cl_device_probe(struct device *dev)
 
 	dev_dbg(dev, "Device probe\n");
 
-	strncpy(id.name, dev_name(dev), MEI_CL_NAME_SIZE);
+	strlcpy(id.name, dev_name(dev), sizeof(id.name));
 
 	return driver->probe(device, &id);
 }
-- 
1.9.3