[dm-devel] [PATCH] dm-crypt: use memzero_explicit for on-stack buffer
Milan Broz
gmazyland at gmail.com
Sat Nov 22 08:36:04 UTC 2014
Use memzero_explicit to cleanup sensitive data allocated on stack
to prevent compiler optimize and remove memset() calls.
Signed-off-by: Milan Broz <gmazyland at gmail.com>
---
drivers/md/dm-crypt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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;
}
--
2.1.3
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