diff options
| author | Ondrej Kozina <okozina@redhat.com> | 2016-11-02 15:02:08 +0100 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:50:58 +0200 |
| commit | 240780611f9744c2a0aa6dfdd053a4a6a1b946db (patch) | |
| tree | bd3f5b991bd616470eb778670aa968a98ae42e20 /drivers | |
| parent | d123c9727f289e06a95be6e64fc9c5c51950f702 (diff) | |
dm crypt: mark key as invalid until properly loaded
commit 265e9098bac02bc5e36cda21fdbad34cb5b2f48d upstream.
In crypt_set_key(), if a failure occurs while replacing the old key
(e.g. tfm->setkey() fails) the key must not have DM_CRYPT_KEY_VALID flag
set. Otherwise, the crypto layer would have an invalid key that still
has DM_CRYPT_KEY_VALID flag set.
Signed-off-by: Ondrej Kozina <okozina@redhat.com>
Reviewed-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-crypt.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 7409d7972..53ce281e4 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1283,12 +1283,15 @@ static int crypt_set_key(struct crypt_config *cc, char *key) if (!cc->key_size && strcmp(key, "-")) goto out; + /* clear the flag since following operations may invalidate previously valid key */ + clear_bit(DM_CRYPT_KEY_VALID, &cc->flags); + if (cc->key_size && crypt_decode_key(cc->key, key, cc->key_size) < 0) goto out; - set_bit(DM_CRYPT_KEY_VALID, &cc->flags); - r = crypt_setkey_allcpus(cc); + if (!r) + set_bit(DM_CRYPT_KEY_VALID, &cc->flags); out: /* Hex key string not needed after here, so wipe it. */ |