From: Stephan Mueller Date: Tue, 11 Nov 2014 04:37:07 +0000 (+0100) Subject: crypto: algif - zeroize message digest buffer X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2a6af25befd0197e805b3aa5ebfc253079ce7136;p=linux-beck.git crypto: algif - zeroize message digest buffer Zeroize the buffer holding the message digest calculated for the consumer before the buffer is released by the hash AF_ALG interface handler. Signed-off-by: Stephan Mueller Signed-off-by: Herbert Xu --- diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c index 850246206b12..f75db4ce48bf 100644 --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -258,6 +258,8 @@ static void hash_sock_destruct(struct sock *sk) struct alg_sock *ask = alg_sk(sk); struct hash_ctx *ctx = ask->private; + memzero_explicit(ctx->result, + crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req))); sock_kfree_s(sk, ctx->result, crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req))); sock_kfree_s(sk, ctx, ctx->len);