On 8/14/25 00:34, Elena Reshetova wrote:
> +/* Mutex to ensure no concurrent EPC accesses during EUPDATESVN */
> +static DEFINE_MUTEX(sgx_svn_lock);
> +
> int sgx_inc_usage_count(void)
> {
> + int ret;
> +
> + guard(mutex)(&sgx_svn_lock);
> +
> + if (!sgx_usage_count) {
> + ret = sgx_update_svn();
> + if (ret)
> + return ret;
> + }
> +
> + sgx_usage_count++;
> +
> return 0;
> }
>
> void sgx_dec_usage_count(void)
> {
> - return;
> + sgx_usage_count--;
> }
How is a plain int-- safe?
Where's the locking?
