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authorSabrina Dubroca <sd@queasysnail.net>2018-09-12 17:44:41 +0200
committerDavid S. Miller <davem@davemloft.net>2018-09-13 12:03:47 -0700
commit7cba09c6d5bc73ebbd25a353742d9ddb7a713b95 (patch)
treee29dc6d8d637fd36f906016dfa30aa8ee4365457
parentf0e0d04413fcce9bc76388839099aee93cd0d33b (diff)
tls: don't copy the key out of tls12_crypto_info_aes_gcm_128
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>
-rw-r--r--net/tls/tls_sw.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index e28a6ff25d96..f29b7c49cbf2 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1136,7 +1136,6 @@ void tls_sw_free_resources_rx(struct sock *sk)
int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
{
- 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_tx *sw_ctx_tx = NULL;
@@ -1265,9 +1264,7 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
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(*aead, keyval,
+ rc = crypto_aead_setkey(*aead, gcm_128_info->key,
TLS_CIPHER_AES_GCM_128_KEY_SIZE);
if (rc)
goto free_aead;