File libvirt-qemu-Avoid-NULL-dereference-in-qemuSharedDiskEntryFree.patch of Package libvirt

From 77ac5d23d1d99b74c5a6d9d8bfc2c79918555aca Mon Sep 17 00:00:00 2001
Message-Id: <77ac5d23d1d99b74c5a6d9d8bfc2c79918555aca.1373271638.git.jdenemar@redhat.com>
From: Jiri Denemark <jdenemar@redhat.com>
Date: Tue, 12 Mar 2013 09:10:41 +0100
Subject: [PATCH] qemu: Avoid NULL dereference in qemuSharedDiskEntryFree

https://bugzilla.redhat.com/show_bug.cgi?id=908073

At least one caller may call qemuSharedDiskEntryFree with NULL as the
first argument. Let's make the function similar to other *Free functions
and do nothing in such case.
(cherry picked from commit 57bb725acaf3f04f5fe4570d811a2ca840a4960c)
---
 src/qemu/qemu_conf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 575553c..78cd528 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -865,6 +865,9 @@ qemuSharedDiskEntryFree(void *payload, const void *name ATTRIBUTE_UNUSED)
     qemuSharedDiskEntryPtr entry = payload;
     size_t i;
 
+    if (!entry)
+        return;
+
     for (i = 0; i < entry->ref; i++) {
         VIR_FREE(entry->domains[i]);
     }
-- 
1.8.2.1