From 26b3d9fbc04f56ab59ba2e8eacc59a6a9bdb8425 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 22 Nov 2021 19:50:30 -0500
Subject: [PATCH 5/6] KVM: SEV: initialize regions_list of a mirror VM
Git-commit: 2b347a387811cb4aa7bcdb96e9203c5019a6fb41
Patch-mainline: 5.16-rc4
References: bsc#1194526

This was broken before the introduction of KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM,
but technically harmless because the region list was unused for a mirror
VM.  However, it is untidy and it now causes a NULL pointer access when
attempting to move the encryption context of a mirror VM.

Fixes: 54526d1fd593 ("KVM: x86: Support KVM VMs sharing SEV context")
Message-Id: <20211123005036.2954379-7-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Li Zhang <lizhang@suse.de>
---
 arch/x86/kvm/svm/sev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index f4c01d24dd96..ccbcde5b7e0e 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2004,6 +2004,7 @@ int svm_vm_copy_asid_from(struct kvm *kvm, unsigned int source_fd)
 	mirror_sev->fd = source_sev.fd;
 	mirror_sev->es_active = source_sev.es_active;
 	mirror_sev->handle = source_sev.handle;
+	INIT_LIST_HEAD(&mirror_sev->regions_list);
 	/*
 	 * Do not copy ap_jump_table. Since the mirror does not share the same
 	 * KVM contexts as the original, and they may have different
-- 
2.31.1