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| author | Milan Broz <gmazyland@gmail.com> | 2014-11-22 09:36:04 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2014-12-02 10:25:07 -0500 |
| commit | 1a71d6ffe18c0d0f03fc8531949cc8ed41d702ee (patch) | |
| tree | 23a55aac2b85ea96d94ad54897293020d4615167 /drivers/md/dm-crypt.c | |
| parent | 02717d9855400c12c6e338ce1f5c2e1310def49a (diff) | |
| download | lwn-1a71d6ffe18c0d0f03fc8531949cc8ed41d702ee.tar.gz lwn-1a71d6ffe18c0d0f03fc8531949cc8ed41d702ee.zip | |
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: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/md/dm-crypt.c')
| -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 cd15e0801228..ce11a90a33c3 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -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; } |