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| author | Milan Broz <gmazyland@gmail.com> | 2014-11-22 09:36:04 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-08 10:30:18 -0800 |
| commit | 6425e7b0c86689e8788fdc892c503d1c2ba40004 (patch) | |
| tree | 146490bcb6752ba9de1e56e5d1df30e082f15fe9 /drivers/md | |
| parent | 3c737ac94b10d6daa476478131c3c4832039d843 (diff) | |
| download | lwn-6425e7b0c86689e8788fdc892c503d1c2ba40004.tar.gz lwn-6425e7b0c86689e8788fdc892c503d1c2ba40004.zip | |
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 <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-crypt.c | 2 |
1 files changed, 1 insertions, 1 deletions
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; } |