diff options
| author | Stefan Rompf <stefan@loplof.de> | 2006-01-06 00:20:08 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 08:34:01 -0800 |
| commit | 9d3520a339d62f942085e9888f66905eb8b350bd (patch) | |
| tree | 622374ba69e8430ec2ec8d7b00a3d28990659d45 | |
| parent | 0b56306e56784d0513e1193d58c05a6bd97bd1a9 (diff) | |
[PATCH] dm-crypt: zero key before freeing it
Zap the memory before freeing it so we don't leave crypto information
around in memory.
Signed-off-by: Stefan Rompf <stefan@loplof.de>
Acked-by: Clemens Fruhwirth <clemens@endorphin.org>
Acked-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/md/dm-crypt.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index cf663105668..a601a427885 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -690,6 +690,8 @@ bad3: bad2: crypto_free_tfm(tfm); bad1: + /* Must zero key material before freeing */ + memset(cc, 0, sizeof(*cc) + cc->key_size * sizeof(u8)); kfree(cc); return -EINVAL; } @@ -706,6 +708,9 @@ static void crypt_dtr(struct dm_target *ti) cc->iv_gen_ops->dtr(cc); crypto_free_tfm(cc->tfm); dm_put_device(ti, cc->dev); + + /* Must zero key material before freeing */ + memset(cc, 0, sizeof(*cc) + cc->key_size * sizeof(u8)); kfree(cc); } |