[libvirt] [PATCH] qemu: Avoid leak in qemuDomainCheckRemoveOptionalDisk

[Jiri Denemark]

Coverity complains about event being leaked in
qemuDomainCheckRemoveOptionalDisk. The best fix for it is to avoid
searching for the disk (using its srouce path even) we got by walking
through vm->def->disks array.

Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
---
 src/qemu/qemu_domain.c | 25 ++++++++++---------------
 1 file changed, 10 insertions(+), 15 deletions(-)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 7a0be12..78cfdc6 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -2176,11 +2176,11 @@ qemuDomainSetFakeReboot(virQEMUDriverPtr driver,
 static int
 qemuDomainCheckRemoveOptionalDisk(virQEMUDriverPtr driver,
                                   virDomainObjPtr vm,
-                                  virDomainDiskDefPtr disk)
+                                  size_t diskIndex)
 {
     char uuid[VIR_UUID_STRING_BUFLEN];
     virObjectEventPtr event = NULL;
-    virDomainDiskDefPtr del_disk = NULL;
+    virDomainDiskDefPtr disk = vm->def->disks[diskIndex];
     const char *src = virDomainDiskGetSource(disk);
 
     virUUIDFormat(vm->def->uuid, uuid);
@@ -2200,13 +2200,8 @@ qemuDomainCheckRemoveOptionalDisk(virQEMUDriverPtr driver,
         event = virDomainEventDiskChangeNewFromObj(vm, src, NULL,
                                                    disk->info.alias,
                                                    VIR_DOMAIN_EVENT_DISK_DROP_MISSING_ON_START);
-
-        if (!(del_disk = virDomainDiskRemoveByName(vm->def, src))) {
-            virReportError(VIR_ERR_INVALID_ARG,
-                           _("no source device %s"), src);
-            return -1;
-        }
-        virDomainDiskDefFree(del_disk);
+        virDomainDiskRemove(vm->def, diskIndex);
+        virDomainDiskDefFree(disk);
     }
 
     if (event)
@@ -2218,11 +2213,11 @@ qemuDomainCheckRemoveOptionalDisk(virQEMUDriverPtr driver,
 static int
 qemuDomainCheckDiskStartupPolicy(virQEMUDriverPtr driver,
                                  virDomainObjPtr vm,
-                                 virDomainDiskDefPtr disk,
+                                 size_t diskIndex,
                                  bool cold_boot)
 {
     char uuid[VIR_UUID_STRING_BUFLEN];
-    int startupPolicy = disk->startupPolicy;
+    int startupPolicy = vm->def->disks[diskIndex]->startupPolicy;
 
     virUUIDFormat(vm->def->uuid, uuid);
 
@@ -2244,7 +2239,7 @@ qemuDomainCheckDiskStartupPolicy(virQEMUDriverPtr driver,
             break;
     }
 
-    if (qemuDomainCheckRemoveOptionalDisk(driver, vm, disk) < 0)
+    if (qemuDomainCheckRemoveOptionalDisk(driver, vm, diskIndex) < 0)
         goto error;
 
     return 0;
@@ -2282,11 +2277,11 @@ qemuDomainCheckDiskPresence(virQEMUDriverPtr driver,
 {
     int ret = -1;
     size_t i;
-    virDomainDiskDefPtr disk;
 
     VIR_DEBUG("Checking for disk presence");
     for (i = vm->def->ndisks; i > 0; i--) {
-        disk = vm->def->disks[i - 1];
+        size_t idx = i - 1;
+        virDomainDiskDefPtr disk = vm->def->disks[idx];
         const char *path = virDomainDiskGetSource(disk);
         virStorageFileFormat format = virDomainDiskGetFormat(disk);
         virStorageType type = virStorageSourceGetActualType(&disk->src);
@@ -2308,7 +2303,7 @@ qemuDomainCheckDiskPresence(virQEMUDriverPtr driver,
             continue;
 
         if (disk->startupPolicy &&
-            qemuDomainCheckDiskStartupPolicy(driver, vm, disk,
+            qemuDomainCheckDiskStartupPolicy(driver, vm, idx,
                                              cold_boot) >= 0) {
             virResetLastError();
             continue;
-- 
1.9.3