From d2bdd2681278d66fd34cd8e0cf724de918f429b2 Mon Sep 17 00:00:00 2001 From: Vakul Garg Date: Wed, 11 Jul 2018 14:32:20 +0530 Subject: [PATCH] net/tls: Use aead_request_alloc/free for request alloc/free Instead of kzalloc/free for aead_request allocation and free, use functions aead_request_alloc(), aead_request_free(). It ensures that any sensitive crypto material held in crypto transforms is securely erased from memory. Signed-off-by: Vakul Garg Acked-by: Dave Watson Signed-off-by: David S. Miller --- net/tls/tls_sw.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 0d670c8adf18..7453f5ae0819 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -57,14 +57,11 @@ static int tls_do_decryption(struct sock *sk, struct aead_request *aead_req; int ret; - unsigned int req_size = sizeof(struct aead_request) + - crypto_aead_reqsize(ctx->aead_recv); - aead_req = kzalloc(req_size, flags); + aead_req = aead_request_alloc(ctx->aead_recv, flags); if (!aead_req) return -ENOMEM; - aead_request_set_tfm(aead_req, ctx->aead_recv); aead_request_set_ad(aead_req, TLS_AAD_SPACE_SIZE); aead_request_set_crypt(aead_req, sgin, sgout, data_len + tls_ctx->rx.tag_size, @@ -86,7 +83,7 @@ static int tls_do_decryption(struct sock *sk, ctx->saved_data_ready(sk); out: - kfree(aead_req); + aead_request_free(aead_req); return ret; } @@ -224,8 +221,7 @@ static int tls_push_record(struct sock *sk, int flags, struct aead_request *req; int rc; - req = kzalloc(sizeof(struct aead_request) + - crypto_aead_reqsize(ctx->aead_send), sk->sk_allocation); + req = aead_request_alloc(ctx->aead_send, sk->sk_allocation); if (!req) return -ENOMEM; @@ -267,7 +263,7 @@ static int tls_push_record(struct sock *sk, int flags, tls_advance_record_sn(sk, &tls_ctx->tx); out_req: - kfree(req); + aead_request_free(req); return rc; } -- GitLab