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authorVakul Garg <vakul.garg@nxp.com>2018-07-11 12:02:20 +0300
committerDavid S. Miller <davem@davemloft.net>2018-07-13 00:44:11 +0300
commitd2bdd2681278d66fd34cd8e0cf724de918f429b2 (patch)
tree27195eda78c768a6f96e6583bbb313b220659abd /net/tls
parentcba54f9cf4ec1126dde5576e025691c27f669d85 (diff)
downloadlinux-d2bdd2681278d66fd34cd8e0cf724de918f429b2.tar.xz
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 <vakul.garg@nxp.com> Acked-by: Dave Watson <davejwatson@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tls')
-rw-r--r--net/tls/tls_sw.c12
1 files 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;
}