commit 8056721cbb75a717604a1f7971440726d9d85045
Author: Peter Krempa <pkrempa@redhat.com>
Date:   Thu Nov 9 12:51:25 2017 +0100

    qemu: Tolerate storage source private data being NULL
    
    In some cases it does not make sense to pursue that the private data
    will be allocated (especially when we don't need to put anything in it).
    
    Ensure that the code works without it.
    
    This also fixes few crashes pointed out in
    https://bugzilla.redhat.com/show_bug.cgi?id=1510323

Index: libvirt-3.9.0/src/qemu/qemu_command.c
===================================================================
--- libvirt-3.9.0.orig/src/qemu/qemu_command.c
+++ libvirt-3.9.0/src/qemu/qemu_command.c
@@ -1362,12 +1362,17 @@ qemuBuildDriveSourceStr(virDomainDiskDef
 {
     int actualType = virStorageSourceGetActualType(disk->src);
     qemuDomainStorageSourcePrivatePtr srcpriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(disk->src);
-    qemuDomainSecretInfoPtr secinfo = srcpriv->secinfo;
-    qemuDomainSecretInfoPtr encinfo = srcpriv->encinfo;
+    qemuDomainSecretInfoPtr secinfo = NULL;
+    qemuDomainSecretInfoPtr encinfo = NULL;
     virJSONValuePtr srcprops = NULL;
     char *source = NULL;
     int ret = -1;
 
+    if (srcpriv) {
+        secinfo = srcpriv->secinfo;
+        encinfo = srcpriv->encinfo;
+    }
+
     if (qemuDiskSourceNeedsProps(disk->src) &&
         !(srcprops = qemuDiskSourceGetProps(disk->src)))
         goto cleanup;
@@ -2239,8 +2244,13 @@ qemuBuildDiskDriveCommandLine(virCommand
         bool driveBoot = false;
         virDomainDiskDefPtr disk = def->disks[i];
         qemuDomainStorageSourcePrivatePtr srcPriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(disk->src);
-        qemuDomainSecretInfoPtr secinfo = srcPriv->secinfo;
-        qemuDomainSecretInfoPtr encinfo = srcPriv->encinfo;
+        qemuDomainSecretInfoPtr secinfo = NULL;
+        qemuDomainSecretInfoPtr encinfo = NULL;
+
+        if (srcPriv) {
+            secinfo = srcPriv->secinfo;
+            encinfo = srcPriv->encinfo;
+        }
 
         if (disk->info.bootIndex) {
             bootindex = disk->info.bootIndex;
Index: libvirt-3.9.0/src/qemu/qemu_hotplug.c
===================================================================
--- libvirt-3.9.0.orig/src/qemu/qemu_hotplug.c
+++ libvirt-3.9.0/src/qemu/qemu_hotplug.c
@@ -259,6 +259,7 @@ qemuDomainChangeEjectableMedia(virQEMUDr
     qemuDomainObjPrivatePtr priv = vm->privateData;
     qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
     qemuDomainStorageSourcePrivatePtr srcPriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(disk->src);
+    qemuDomainSecretInfoPtr secinfo = NULL;
     const char *format = NULL;
     char *sourcestr = NULL;
 
@@ -268,6 +269,9 @@ qemuDomainChangeEjectableMedia(virQEMUDr
         goto cleanup;
     }
 
+    if (srcPriv)
+        secinfo = srcPriv->secinfo;
+
     if (disk->device != VIR_DOMAIN_DISK_DEVICE_FLOPPY &&
         disk->device != VIR_DOMAIN_DISK_DEVICE_CDROM) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -300,7 +304,7 @@ qemuDomainChangeEjectableMedia(virQEMUDr
     }
 
     if (!virStorageSourceIsEmpty(newsrc)) {
-        if (qemuGetDriveSourceString(newsrc, srcPriv->secinfo, &sourcestr) < 0)
+        if (qemuGetDriveSourceString(newsrc, secinfo, &sourcestr) < 0)
             goto error;
 
         if (virStorageSourceGetActualType(newsrc) != VIR_STORAGE_TYPE_DIR) {
@@ -371,8 +375,8 @@ qemuDomainAttachDiskGeneric(virConnectPt
     virJSONValuePtr secobjProps = NULL;
     virJSONValuePtr encobjProps = NULL;
     qemuDomainStorageSourcePrivatePtr srcPriv;
-    qemuDomainSecretInfoPtr secinfo;
-    qemuDomainSecretInfoPtr encinfo;
+    qemuDomainSecretInfoPtr secinfo = NULL;
+    qemuDomainSecretInfoPtr encinfo = NULL;
 
     if (qemuDomainPrepareDisk(driver, vm, disk, NULL, false) < 0)
         goto cleanup;
@@ -384,13 +388,16 @@ qemuDomainAttachDiskGeneric(virConnectPt
         goto error;
 
     srcPriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(disk->src);
-    secinfo = srcPriv->secinfo;
+    if (srcPriv) {
+        secinfo = srcPriv->secinfo;
+        encinfo = srcPriv->encinfo;
+    }
+
     if (secinfo && secinfo->type == VIR_DOMAIN_SECRET_INFO_TYPE_AES) {
         if (qemuBuildSecretInfoProps(secinfo, &secobjProps) < 0)
             goto error;
     }
 
-    encinfo = srcPriv->encinfo;
     if (encinfo && qemuBuildSecretInfoProps(encinfo, &encobjProps) < 0)
         goto error;