(just for reference. the patch's been already posted on dm-devel) on crypt_message() key set code path while loading new key replacing the old one in case tfm->setkey() fails we would end having invalid key in crypto layer but DM_CRYPT_KEY_VALID flag set.
Signed-off-by: Ondrej Kozina <[email protected]> --- drivers/md/dm-crypt.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index a276883..0aedd0e 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1503,12 +1503,15 @@ 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. */ -- 2.7.4 -- dm-devel mailing list [email protected] https://www.redhat.com/mailman/listinfo/dm-devel
