wusb: replace memset by memzero_explicit
Memset on a local variable may be removed when it is called just before the
variable goes out of scope. Using memzero_explicit defeats this
optimization. A simplified version of the semantic patch that makes this
change is as follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
identifier x;
type T;
@@
{
... when any
T x[...];
... when any
when exists
- memset
+ memzero_explicit
(x,
-0,
...)
... when != x
when strict
}
// </smpl>
This change was suggested by Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/wusbcore/security.c b/drivers/usb/wusbcore/security.c
index cc74d66..b66faaf 100644
--- a/drivers/usb/wusbcore/security.c
+++ b/drivers/usb/wusbcore/security.c
@@ -522,10 +522,10 @@
error_hs2:
error_hs1:
memset(hs, 0, 3*sizeof(hs[0]));
- memset(&keydvt_out, 0, sizeof(keydvt_out));
- memset(&keydvt_in, 0, sizeof(keydvt_in));
- memset(&ccm_n, 0, sizeof(ccm_n));
- memset(mic, 0, sizeof(mic));
+ memzero_explicit(&keydvt_out, sizeof(keydvt_out));
+ memzero_explicit(&keydvt_in, sizeof(keydvt_in));
+ memzero_explicit(&ccm_n, sizeof(ccm_n));
+ memzero_explicit(mic, sizeof(mic));
if (result < 0)
wusb_dev_set_encryption(usb_dev, 0);
error_dev_set_encryption: