From 6425e7b0c86689e8788fdc892c503d1c2ba40004 Mon Sep 17 00:00:00 2001 From: Milan Broz Date: Sat, 22 Nov 2014 09:36:04 +0100 Subject: dm crypt: use memzero_explicit for on-stack buffer commit 1a71d6ffe18c0d0f03fc8531949cc8ed41d702ee upstream. Use memzero_explicit to cleanup sensitive data allocated on stack to prevent the compiler from optimizing and removing memset() calls. Signed-off-by: Milan Broz Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-crypt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/md') diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index fc93b9330af4..08981be7baa1 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; } -- cgit v1.2.3