[libvirt] [PATCH libvirt] qemu: Fix segmentation fault when attaching a non iSCSI host device

[Marc Hartmayer]

Add a check if it's a iSCSI hostdev and if it's not then don't use the
union member 'iscsi'. The segmentation fault occured when accessing
secinfo->type, but this can vary from case to case.

Signed-off-by: Marc Hartmayer <mhartmay at linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk at linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy at linux.vnet.ibm.com>
---
 src/qemu/qemu_hotplug.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 6dc16a1054af..83d0e1c71a8e 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2343,8 +2343,7 @@ qemuDomainAttachHostSCSIDevice(virConnectPtr conn,
     bool secobjAdded = false;
     virJSONValuePtr secobjProps = NULL;
     virDomainHostdevSubsysSCSIPtr scsisrc = &hostdev->source.subsys.u.scsi;
-    virDomainHostdevSubsysSCSIiSCSIPtr iscsisrc = &scsisrc->u.iscsi;
-    qemuDomainStorageSourcePrivatePtr srcPriv;
+    qemuDomainStorageSourcePrivatePtr srcPriv = NULL;
     qemuDomainSecretInfoPtr secinfo = NULL;
 
     if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE_SCSI_GENERIC)) {
@@ -2386,7 +2385,8 @@ qemuDomainAttachHostSCSIDevice(virConnectPtr conn,
     if (qemuDomainSecretHostdevPrepare(conn, priv, hostdev) < 0)
         goto cleanup;
 
-    srcPriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(iscsisrc->src);
+    if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI)
+        srcPriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(scsisrc->u.iscsi.src);
     if (srcPriv)
         secinfo = srcPriv->secinfo;
     if (secinfo && secinfo->type == VIR_DOMAIN_SECRET_INFO_TYPE_AES) {
-- 
2.13.4