File libvirt-conf-Don-t-crash-on-invalid-chardev-source-definition-of-RNGs-and-other.patch of Package libvirt

From 16654d9842ce68b208fc946c75a1368555ddb11c Mon Sep 17 00:00:00 2001
Message-Id: <16654d9842ce68b208fc946c75a1368555ddb11c@dist-git>
From: Peter Krempa <pkrempa@redhat.com>
Date: Fri, 28 Mar 2014 22:54:05 +0100
Subject: [PATCH] conf: Don't crash on invalid chardev source definition of
 RNGs and other

https://bugzilla.redhat.com/show_bug.cgi?id=786408

Downstream note: Only the test case is backported as the code shouldn't
be broken downstream.

Since commit 297c99a5 an invalid source definition XML of a character
device that is used as backend for RNG devices, smartcards and redirdevs
causes crash of the daemon when parsing such a definition.

The device types mentioned above are not a part of a regular character
device but are backends for other types. Thus when parsing such device
NULL is passed as the argument @chr_def. Later when checking the
validity of the definition @chr_def was dereferenced when parsing a UNIX
socket backend with missing path of the socket and crashed the daemon.

Sample offending configuration:
  <devices>
  ...
    <rng model='virtio'>
      <backend model='egd' type='unix'>
        <source mode='bind' service='1024'/>
      </backend>
    </rng>
  </devices>

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1012196
(cherry picked from commit 795527548fea79902ea4ce32747e069944cf3e61)

Conflicts:
	src/conf/domain_conf.c - don't backport any code change
	tests/qemuxml2argvtest.c - context
    tests/qemuxml2argvdata/qemuxml2argv-virtio-rng-egd-crash.xml -
    pci-root element was not backported

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 .../qemuxml2argv-virtio-rng-egd-crash.xml          | 26 ++++++++++++++++++++++
 tests/qemuxml2argvtest.c                           |  2 ++
 2 files changed, 28 insertions(+)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-virtio-rng-egd-crash.xml

diff --git a/tests/qemuxml2argvdata/qemuxml2argv-virtio-rng-egd-crash.xml b/tests/qemuxml2argvdata/qemuxml2argv-virtio-rng-egd-crash.xml
new file mode 100644
index 0000000..fd547ef
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-virtio-rng-egd-crash.xml
@@ -0,0 +1,26 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219100</memory>
+  <currentMemory unit='KiB'>219100</currentMemory>
+  <vcpu placement='static' cpuset='1-4,8-20,525'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <controller type='usb' index='0'/>
+    <memballoon model='virtio'/>
+    <rng model='virtio'>
+      <backend model='egd' type='unix'>
+        <!-- https://bugzilla.redhat.com/show_bug.cgi?id=1012196 -->
+        <source mode='connect' host='1.2.3.4' service='1234'/>
+      </backend>
+    </rng>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 79b8b69..3e9c685 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -866,6 +866,8 @@ mymain(void)
             QEMU_CAPS_OBJECT_RNG_RANDOM);
     DO_TEST("virtio-rng-egd", QEMU_CAPS_DEVICE, QEMU_CAPS_DEVICE_VIRTIO_RNG,
             QEMU_CAPS_OBJECT_RNG_EGD);
+    DO_TEST_PARSE_ERROR("virtio-rng-egd-crash", QEMU_CAPS_DEVICE,
+            QEMU_CAPS_DEVICE_VIRTIO_RNG, QEMU_CAPS_OBJECT_RNG_EGD);
 
     VIR_FREE(driver.stateDir);
     virCapabilitiesFree(driver.caps);
-- 
1.9.1