[PATCH] tools/xenstored: fix possible NULL deref

[Juergen Gross]

Avoid dereferencing NULL in introduce_domain() when called during
live update.

Coverity ID: 1665111
Fixes: f78895ad78c9 ("tools/xenstored: Read event channel from xenstored page")

Signed-off-by: Juergen Gross <jgr...@suse.com>
---
 tools/xenstored/domain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/xenstored/domain.c b/tools/xenstored/domain.c
index 694d68670a..5ce539d640 100644
--- a/tools/xenstored/domain.c
+++ b/tools/xenstored/domain.c
@@ -1032,7 +1032,7 @@ static struct domain *introduce_domain(const void *ctx,
                if (!interface && !restore)
                        return NULL;
 
-               if (interface->evtchn_port)
+               if (!restore && interface->evtchn_port)
                        port = interface->evtchn_port;
 
                if (new_domain(domain, port, restore)) {
-- 
2.43.0