From: Stephan Mueller <smueller@chronox.de>
Date: Tue, 11 Nov 2014 04:37:57 +0000 (+0100)
Subject: crypto: algif - zeroize IV buffer
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e1bd95bf7c25530a99ce371e0a26e4932efc021d;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

crypto: algif - zeroize IV buffer

Zeroize the buffer holding the IV used for the completed
cipher operation before the buffer is released by the
skcipher AF_ALG interface handler.

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

diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index 83187f497c7c..85e3bdbe214c 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -566,6 +566,7 @@ static void skcipher_sock_destruct(struct sock *sk)
 	struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(&ctx->req);
 
 	skcipher_free_sgl(sk);
+	memzero_explicit(ctx->iv, crypto_ablkcipher_ivsize(tfm));
 	sock_kfree_s(sk, ctx->iv, crypto_ablkcipher_ivsize(tfm));
 	sock_kfree_s(sk, ctx, ctx->len);
 	af_alg_release_parent(sk);