[PATCH] crypto: kdf - Select hmac in addition to sha256

[Herbert Xu]

On Tue, Jan 18, 2022 at 09:56:49AM +0800, kernel test robot wrote:
> 
> [ 42.753085][ T1] WARNING: CPU: 1 PID: 1 at crypto/kdf_sp800108.c:138 crypto_kdf108_init (crypto/kdf_sp800108.c:136) 
> [   42.754665][    T1] Modules linked in:
> [   42.755366][    T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.16.0-rc1-00049-gd3b04a4398fe #2
> [   42.756752][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
> [ 42.758199][ T1] RIP: 0010:crypto_kdf108_init (crypto/kdf_sp800108.c:136) 
>
> CONFIG_CRYPTO_HMAC=m
> CONFIG_CRYPTO_KDF800108_CTR=y

---8<---
In addition to sha256 we must also enable hmac for the kdf self-test
to work.

Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
Fixes: 304b4acee2f0 ("crypto: kdf - select SHA-256 required...")
Fixes: 026a733e6659 ("crypto: kdf - add SP800-108 counter key...")
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 3ba2f532d79c..2b0456731603 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1850,6 +1850,7 @@ config CRYPTO_JITTERENTROPY
 
 config CRYPTO_KDF800108_CTR
 	tristate
+	select CRYPTO_HMAC
 	select CRYPTO_SHA256
 
 config CRYPTO_USER_API
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt