x86/sgx: Add missing xa_destroy() when virtual EPC is destroyed

xa_destroy() needs to be called to destroy a virtual EPC's page array
before calling kfree() to free the virtual EPC. Currently it is not
called so add the missing xa_destroy().

Fixes: 540745ddbc70 ("x86/sgx: Introduce virtual EPC for use by KVM guests")
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Tested-by: Yang Zhong <yang.zhong@intel.com>
Link: https://lkml.kernel.org/r/20210615101639.291929-1-kai.huang@intel.com

diff --git a/arch/x86/kernel/cpu/sgx/virt.c b/arch/x86/kernel/cpu/sgx/virt.c
index 6ad165a..64511c4 100644 (file)
--- a/arch/x86/kernel/cpu/sgx/virt.c
+++ b/arch/x86/kernel/cpu/sgx/virt.c
@@ -212,6 +212,7 @@ static int sgx_vepc_release(struct inode *inode, struct file *file)
                list_splice_tail(&secs_pages, &zombie_secs_pages);
        mutex_unlock(&zombie_secs_pages_lock);
 
+       xa_destroy(&vepc->page_array);
        kfree(vepc);
 
        return 0;