[libvirt] [PATCH 4/7] Coverity: Fix resource leak in xen driver

[Osier Yang]

Coverity logs:

Error: RESOURCE_LEAK:
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_inotify.c:103: alloc_fn: Calling allocation function "xenDaemonLookupByUUID".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xend_internal.c:2534: alloc_fn: Storage is returned from allocation function "virGetDomain".
/builddir/build/BUILD/libvirt-0.9.10/src/datatypes.c:191: alloc_arg: "virAlloc" allocates memory that is stored into "ret".
/builddir/build/BUILD/libvirt-0.9.10/src/util/memory.c:101: alloc_fn: Storage is returned from allocation function "calloc".
/builddir/build/BUILD/libvirt-0.9.10/src/util/memory.c:101: var_assign: Assigning: "*((void **)ptrptr)" = "calloc(1UL, size)".
/builddir/build/BUILD/libvirt-0.9.10/src/datatypes.c:210: return_alloc: Returning allocated memory "ret".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xend_internal.c:2534: var_assign: Assigning: "ret" = "virGetDomain(conn, name, uuid)".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xend_internal.c:2541: return_alloc: Returning allocated memory "ret".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_inotify.c:103: var_assign: Assigning: "dom" =  storage returned from "xenDaemonLookupByUUID(conn, rawuuid)".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_inotify.c:126: leaked_storage: Variable "dom" going out of scope leaks the storage it points to.

Error: RESOURCE_LEAK:
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2742: alloc_fn: Calling allocation function "fopen".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2742: var_assign: Assigning: "cpuinfo" =  storage returned from "fopen("/proc/cpuinfo", "r")".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2763: noescape: Variable "cpuinfo" is not freed or pointed-to in function "xenHypervisorMakeCapabilitiesInternal".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2574:45: noescape: "xenHypervisorMakeCapabilitiesInternal" does not free or save its pointer parameter "cpuinfo".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2768: leaked_storage: Variable "cpuinfo" going out of scope leaks the storage it points to.

Error: RESOURCE_LEAK:
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2752: alloc_fn: Calling allocation function "fopen".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2752: var_assign: Assigning: "capabilities" =  storage returned from "fopen("/sys/hypervisor/properties/capabilities", "r")".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2763: noescape: Variable "capabilities" is not freed or pointed-to in function "xenHypervisorMakeCapabilitiesInternal".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2574:60: noescape: "xenHypervisorMakeCapabilitiesInternal" does not free or save its pointer parameter "capabilities".
/builddir/build/BUILD/libvirt-0.9.10/src/xen/xen_hypervisor.c:2768: leaked_storage: Variable "capabilities" going out of scope leaks the storage it points to.
---
 src/xen/xen_hypervisor.c |    5 +++--
 src/xen/xen_inotify.c    |    1 +
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/xen/xen_hypervisor.c b/src/xen/xen_hypervisor.c
index 0dae8d9..b4ec579 100644
--- a/src/xen/xen_hypervisor.c
+++ b/src/xen/xen_hypervisor.c
@@ -2732,7 +2732,7 @@ xenHypervisorMakeCapabilities(virConnectPtr conn)
 #ifdef __sun
     return xenHypervisorMakeCapabilitiesSunOS(conn);
 #else
-    virCapsPtr caps;
+    virCapsPtr caps = NULL;
     FILE *cpuinfo, *capabilities;
     struct utsname utsname;
 
@@ -2765,11 +2765,12 @@ xenHypervisorMakeCapabilities(virConnectPtr conn)
                                                  cpuinfo,
                                                  capabilities);
     if (caps == NULL)
-        return NULL;
+        goto cleanup;
 
     if (virNodeSuspendGetTargetMask(&caps->host.powerMgmt) < 0)
         VIR_WARN("Failed to get host power management capabilities");
 
+cleanup:
     VIR_FORCE_FCLOSE(cpuinfo);
     VIR_FORCE_FCLOSE(capabilities);
 
diff --git a/src/xen/xen_inotify.c b/src/xen/xen_inotify.c
index d0cd907..f7495b5 100644
--- a/src/xen/xen_inotify.c
+++ b/src/xen/xen_inotify.c
@@ -123,6 +123,7 @@ xenInotifyXendDomainsDirLookup(virConnectPtr conn, const char *filename,
 
     if (!(*name = strdup(dom->name))) {
         virReportOOMError();
+        virDomainFree(dom);
         return -1;
     }
     memcpy(uuid, dom->uuid, VIR_UUID_BUFLEN);
-- 
1.7.7.3