From af16e754cd4efc3ca1df2b2e725945be743e87f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Mon, 14 Sep 2020 13:29:23 +0200
Subject: [PATCH] qemuProcessReconnect: clear 'oldjob'
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After we started copying the privateData pointer in
qemuDomainObjRestoreJob, we should also free them
once we're done with them.

Register the clear function and use g_auto.
Also add a check for job->cb to qemuDomainObjClearJob,
to prevent freeing an uninitialized job.

https://bugzilla.redhat.com/show_bug.cgi?id=1878450

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: aca37c3fb2e8d733c2788ca4b796c153ea7ce391
---
 src/qemu/qemu_domainjob.c | 3 +++
 src/qemu/qemu_domainjob.h | 1 +
 src/qemu/qemu_process.c   | 4 +++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_domainjob.c b/src/qemu/qemu_domainjob.c
index e5910a11a1..3c2c6b9179 100644
--- a/src/qemu/qemu_domainjob.c
+++ b/src/qemu/qemu_domainjob.c
@@ -248,6 +248,9 @@ qemuDomainObjRestoreJob(virDomainObjPtr obj,
 void
 qemuDomainObjClearJob(qemuDomainJobObjPtr job)
 {
+    if (!job->cb)
+        return;
+
     qemuDomainObjResetJob(job);
     qemuDomainObjResetAsyncJob(job);
     g_clear_pointer(&job->privateData, job->cb->freeJobPrivate);
diff --git a/src/qemu/qemu_domainjob.h b/src/qemu/qemu_domainjob.h
index eedd84c503..79f0127252 100644
--- a/src/qemu/qemu_domainjob.h
+++ b/src/qemu/qemu_domainjob.h
@@ -275,6 +275,7 @@ int qemuDomainJobInfoToParams(qemuDomainJobInfoPtr jobInfo,
 bool qemuDomainTrackJob(qemuDomainJob job);
 
 void qemuDomainObjClearJob(qemuDomainJobObjPtr job);
+G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(qemuDomainJobObj, qemuDomainObjClearJob);
 
 int
 qemuDomainObjInitJob(qemuDomainJobObjPtr job,
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index b1af35b933..073b2d96e0 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -8081,7 +8081,9 @@ qemuProcessReconnect(void *opaque)
     virQEMUDriverPtr driver = data->driver;
     virDomainObjPtr obj = data->obj;
     qemuDomainObjPrivatePtr priv;
-    qemuDomainJobObj oldjob;
+    g_auto(qemuDomainJobObj) oldjob = {
+      .cb = NULL,
+    };
     int state;
     int reason;
     g_autoptr(virQEMUDriverConfig) cfg = NULL;