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tls: return -EFAULT if copy_to_user() fails

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The copy_to_user() function returns the number of bytes remaining but we
want to return -EFAULT here.

Fixes: 3c4d755915 ("tls: kernel TLS support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2017-06-23 13:15:44 +03:00 committed by David S. Miller
parent 93bbbfbb4a
commit ac55cd6193
1 changed files with 6 additions and 4 deletions
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10
net/tls/tls_main.c
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@ -273,7 +273,8 @@ static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval,
}
if (len == sizeof(crypto_info)) {
rc = copy_to_user(optval, crypto_info, sizeof(*crypto_info));
if (copy_to_user(optval, crypto_info, sizeof(*crypto_info)))
rc = -EFAULT;
goto out;
}
@ -293,9 +294,10 @@ static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval,
memcpy(crypto_info_aes_gcm_128->iv, ctx->iv,
TLS_CIPHER_AES_GCM_128_IV_SIZE);
release_sock(sk);
rc = copy_to_user(optval,
crypto_info_aes_gcm_128,
sizeof(*crypto_info_aes_gcm_128));
if (copy_to_user(optval,
crypto_info_aes_gcm_128,
sizeof(*crypto_info_aes_gcm_128)))
rc = -EFAULT;
break;
}
default: