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From 9b8b65c827169eca2d0e500150009ac0f857d455 Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@suse.com>
Date: Mon, 31 Oct 2022 13:36:25 +0100
Subject: [PATCH 078/126] x86: also zap secondary time area handles during soft
reset
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Just like domain_soft_reset() properly zaps runstate area handles, the
secondary time area ones also need discarding to prevent guest memory
corruption once the guest is re-started.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
master commit: b80d4f8d2ea6418e32fb4f20d1304ace6d6566e3
master date: 2022-10-27 11:49:09 +0200
---
xen/arch/x86/domain.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index ce6ddcf31397..e9b8ed4c96c2 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -927,6 +927,7 @@ int arch_domain_soft_reset(struct domain *d)
struct page_info *page = virt_to_page(d->shared_info), *new_page;
int ret = 0;
struct domain *owner;
+ struct vcpu *v;
mfn_t mfn;
gfn_t gfn;
p2m_type_t p2mt;
@@ -1006,7 +1007,12 @@ int arch_domain_soft_reset(struct domain *d)
"Failed to add a page to replace %pd's shared_info frame %"PRI_gfn"\n",
d, gfn_x(gfn));
free_domheap_page(new_page);
+ goto exit_put_gfn;
}
+
+ for_each_vcpu ( d, v )
+ set_xen_guest_handle(v->arch.time_info_guest, NULL);
+
exit_put_gfn:
put_gfn(d, gfn_x(gfn));
exit_put_page:
--
2.37.4
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