From: Stephan Mueller <smueller@chronox.de>
Date: Tue, 14 Jun 2016 05:36:06 +0000 (+0200)
Subject: crypto: drbg - avoid duplicate maintenance of key
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=103eb3f7bfb4fce0e299afbf50fef8ffa8d9d38c;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

crypto: drbg - avoid duplicate maintenance of key

The TFM object maintains the key for the CTR DRBG.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/crypto/drbg.c b/crypto/drbg.c
index 8ceb71699dea..ded86385ab6e 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -517,8 +517,7 @@ static int drbg_ctr_update(struct drbg_state *drbg, struct list_head *seed,
 		return ret;
 
 	/* 10.2.1.2 step 5 */
-	memcpy(drbg->C, temp, drbg_keylen(drbg));
-	ret = crypto_skcipher_setkey(drbg->ctr_handle, drbg->C,
+	ret = crypto_skcipher_setkey(drbg->ctr_handle, temp,
 				     drbg_keylen(drbg));
 	if (ret)
 		goto out;