Commit 1a71d6ff authored by Milan Broz's avatar Milan Broz Committed by Mike Snitzer
Browse files

dm crypt: use memzero_explicit for on-stack buffer 



Use memzero_explicit to cleanup sensitive data allocated on stack
to prevent the compiler from optimizing and removing memset() calls.

Signed-off-by: default avatarMilan Broz <gmazyland@gmail.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
parent 02717d98

drivers/md/dm-crypt.c

+1 −1
Original line number Diff line number Diff line
@@ -711,7 +711,7 @@ 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;

}