diff mbox

dm-crypt: use memzero_explicit for on-stack buffer

Message ID 1416645364-23274-1-git-send-email-gmazyland@gmail.com (mailing list archive)
State Accepted, archived
Delegated to: Mike Snitzer
Headers show

Commit Message

Milan Broz Nov. 22, 2014, 8:36 a.m. UTC 
Use memzero_explicit to cleanup sensitive data allocated on stack
to prevent compiler optimize and remove memset() calls.

Signed-off-by: Milan Broz <gmazyland@gmail.com>
---
 drivers/md/dm-crypt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index fc93b93..08981be 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -705,7 +705,7 @@  static int crypt_iv_tcw_whitening(struct crypt_config *cc,
 	for (i = 0; i < ((1 << SECTOR_SHIFT) / 8); i++)
 		crypto_xor(data + i * 8, buf, 8);
 out:
-	memset(buf, 0, sizeof(buf));
+	memzero_explicit(buf, sizeof(buf));
 	return r;
 }