renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 20:53:53 +08:00
Code

dm integrity: fail early if required HMAC key is not available

Browse Source 
Since crypto API commit 9fa68f6200 ("crypto: hash - prevent using keyed
hashes without setting key") dm-integrity cannot use keyed algorithms
without the key being set.

The dm-integrity recognizes this too late (during use of HMAC), so it
allows creation and formatting of superblock, but the device is in fact
unusable.

Fix it by detecting the key requirement in integrity table constructor.

Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Milan Broz 2018-02-13 14:50:50 +01:00 committed by Mike Snitzer
parent 2d77dafe23
commit e16b4f99f0
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/md/dm-integrity.c
View File

@ -2548,6 +2548,9 @@ static int get_mac(struct crypto_shash **hash, struct alg_spec *a, char **error,
*error = error_key;
return r;
}
} else if (crypto_shash_get_flags(*hash) & CRYPTO_TFM_NEED_KEY) {
*error = error_key;
return -ENOKEY;
}
}