qemu: Init ext devices paths on reconnect

Paths for external devices (well, so far only vTPM) are not
stored in the status XML. Therefore, we need to regenerate them
after we've been restarted and reconnecting to a running domain.
Otherwise these will remain NULL which may later lead to a NULL
dereference.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2150760
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 19b924262353be7db959987bf64d61d89f56a586..c542be5036c5695b5ebd65f835298540abb8d787 100644 (file)
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -8896,6 +8896,9 @@ qemuProcessReconnect(void *opaque)
     if (qemuDomainMasterKeyReadFile(priv) < 0)
         goto error;
 
+    if (qemuExtDevicesInitPaths(driver, obj->def) < 0)
+        goto error;
+
     /* If we are connecting to a guest started by old libvirt there is no
      * allowReboot in status XML and we need to initialize it. */
     qemuProcessPrepareAllowReboot(obj);