The alias would be leaked, since it's not freed on the vm stop path.
---
 src/qemu/qemu_process.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 6787c47cf..d3266e778 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -6445,6 +6445,9 @@ void qemuProcessStop(virQEMUDriverPtr driver,
     virDomainUSBAddressSetFree(priv->usbaddrs);
     priv->usbaddrs = NULL;

+    /* clean up migration data */
+    VIR_FREE(priv->migTLSAlias);
+
     /* The "release" hook cleans up additional resources */
     if (virHookPresent(VIR_HOOK_DRIVER_QEMU)) {
         char *xml = qemuDomainDefFormatXML(driver, vm->def, 0);
-- 
2.12.2

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