From 3a2b715e02c2e0205e7787d9aefd332743ef5599 Mon Sep 17 00:00:00 2001
Message-Id: <3a2b715e02c2e0205e7787d9aefd332743ef5599@dist-git>
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Mon, 19 Jan 2015 10:48:31 +0100
Subject: [PATCH] Fix vmdef usage while in monitor in qemu process
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https://bugzilla.redhat.com/show_bug.cgi?id=1161024

Make local copy of the disk alias in qemuProcessInitPasswords,
instead of referencing the one in domain definition, which
might get freed if the domain crashes while we're in monitor.

Also copy the memballoon period value.

(cherry picked from commit c749eda4a2220cddb24467fbbcf22c9b7917b8a2)
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 src/qemu/qemu_process.c | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 90e45a8..ae1dbdf 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -2550,6 +2550,8 @@ qemuProcessInitPasswords(virConnectPtr conn,
     qemuDomainObjPrivatePtr priv = vm->privateData;
     virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
     size_t i;
+    char *alias = NULL;
+    char *secret = NULL;
 
     for (i = 0; i < vm->def->ngraphics; ++i) {
         virDomainGraphicsDefPtr graphics = vm->def->graphics[i];
@@ -2573,33 +2575,34 @@ qemuProcessInitPasswords(virConnectPtr conn,
 
     if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE)) {
         for (i = 0; i < vm->def->ndisks; i++) {
-            char *secret;
             size_t secretLen;
-            const char *alias;
 
             if (!vm->def->disks[i]->src->encryption ||
                 !virDomainDiskGetSource(vm->def->disks[i]))
                 continue;
 
+            VIR_FREE(secret);
             if (qemuProcessGetVolumeQcowPassphrase(conn,
                                                    vm->def->disks[i],
                                                    &secret, &secretLen) < 0)
                 goto cleanup;
 
-            alias = vm->def->disks[i]->info.alias;
-            if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0) {
-                VIR_FREE(secret);
+            VIR_FREE(alias);
+            if (VIR_STRDUP(alias, vm->def->disks[i]->info.alias) < 0)
+                goto cleanup;
+            if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
                 goto cleanup;
-            }
             ret = qemuMonitorSetDrivePassphrase(priv->mon, alias, secret);
-            VIR_FREE(secret);
-            qemuDomainObjExitMonitor(driver, vm);
+            if (qemuDomainObjExitMonitor(driver, vm) < 0)
+                ret = -1;
             if (ret < 0)
                 goto cleanup;
         }
     }
 
  cleanup:
+    VIR_FREE(alias);
+    VIR_FREE(secret);
     virObjectUnref(cfg);
     return ret;
 }
@@ -4251,6 +4254,7 @@ int qemuProcessStart(virConnectPtr conn,
     virCommandPtr cmd = NULL;
     struct qemuProcessHookData hookData;
     unsigned long cur_balloon;
+    unsigned int period = 0;
     size_t i;
     bool rawio_set = false;
     char *nodeset = NULL;
@@ -4864,15 +4868,18 @@ int qemuProcessStart(virConnectPtr conn,
                        vm->def->mem.cur_balloon);
         goto cleanup;
     }
-    if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
-        goto cleanup;
     if (vm->def->memballoon && vm->def->memballoon->period)
-        qemuMonitorSetMemoryStatsPeriod(priv->mon, vm->def->memballoon->period);
+        period = vm->def->memballoon->period;
+    if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
+        goto cleanup;
+    if (period)
+        qemuMonitorSetMemoryStatsPeriod(priv->mon, period);
     if (qemuMonitorSetBalloon(priv->mon, cur_balloon) < 0) {
         qemuDomainObjExitMonitor(driver, vm);
         goto cleanup;
     }
-    qemuDomainObjExitMonitor(driver, vm);
+    if (qemuDomainObjExitMonitor(driver, vm) < 0)
+        goto cleanup;
 
     VIR_DEBUG("Detecting actual memory size for video device");
     if (qemuProcessUpdateVideoRamSize(driver, vm, asyncJob) < 0)
-- 
2.2.1