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tls: don't copy the key out of tls12_crypto_info_aes_gcm_128

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[ Upstream commit 7cba09c6d5bc73ebbd25a353742d9ddb7a713b95 ]

There's no need to copy the key to an on-stack buffer before calling
crypto_aead_setkey().

Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sabrina Dubroca 2018-09-12 17:44:41 +02:00 committed by Greg Kroah-Hartman
parent ee547ed7de
commit 10cacaf131
1 changed files with 1 additions and 4 deletions
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5
net/tls/tls_sw.c
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@ -661,7 +661,6 @@ static void tls_sw_free_resources(struct sock *sk)
int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx)
{
char keyval[TLS_CIPHER_AES_GCM_128_KEY_SIZE];
struct tls_crypto_info *crypto_info;
struct tls12_crypto_info_aes_gcm_128 *gcm_128_info;
struct tls_sw_context *sw_ctx;
@ -753,9 +752,7 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx)
ctx->push_pending_record = tls_sw_push_pending_record;
memcpy(keyval, gcm_128_info->key, TLS_CIPHER_AES_GCM_128_KEY_SIZE);
rc = crypto_aead_setkey(sw_ctx->aead_send, keyval,
rc = crypto_aead_setkey(sw_ctx->aead_send, gcm_128_info->key,
TLS_CIPHER_AES_GCM_128_KEY_SIZE);
if (rc)
goto free_aead;