noon
These connection leaks were causing problems for me when testing on a Fedora
rawhide system. The seg fault appeared when libvirt had reached its max
number of open connections and was dropping the provider's attempt to connect.
See second patch for updates.
noon
New subject: [PATCH 1 of 2] Fix misc memory and libvirt connection leaks
# HG changeset patch
# User Kaitlin Rupert <karupert(a)us.ibm.com>
# Date 1256568468 25200
# Node ID 71465d8204cafbd92f63a1bb2f998b4df73fc156
# Parent a5cfc77fe35238cf4e17f4d09fcd09633f6f3149
Fix misc memory and libvirt connection leaks
ElementConformsToProfile - leaking classname in elem_to_prof()
ResourcePoolConfigurationCapabilities - potiential libvirt connection leak in
get_rpc_cap()
VSMigrationCapabilities - potiential libvirt connection leak in
get_migration_caps()
misc_util.c - no need to get a new connection pointer - use existing one
Virt_VirtualSystemManagementService.c - after the call to virDomainDestroy(),
we look up the guest and get a new
domain pointer. We do this without
freeing the previous pointer.
pool_parsing.c - reorganize function so that storage pool pointer isn't leaked
in the case that the storage volume pointer is NULL.
Virt_KVMRedirectionSAP.c - use free_domain_list() to free all domain pointers
before exiting function instead of trying to free
each one in the loop (which can cause a leak if an
error occurs and the loop exits before freeing).
Also, be sure to clean up the dominfo struct before
exiting the loop.
Signed-off-by: Kaitlin Rupert <karupert(a)us.ibm.com>
diff -r a5cfc77fe352 -r 71465d8204ca libxkutil/misc_util.c
--- a/libxkutil/misc_util.c Fri Oct 30 05:11:06 2009 -0700
+++ b/libxkutil/misc_util.c Mon Oct 26 07:47:48 2009 -0700
@@ -417,8 +417,7 @@
compare_flags = 2;
}
- _dom = virDomainLookupByName(virDomainGetConnect(dom),
- virDomainGetName(dom));
+ _dom = virDomainLookupByName(conn, virDomainGetName(dom));
if (_dom == NULL) {
CU_DEBUG("Unable to re-lookup domain");
goto out;
diff -r a5cfc77fe352 -r 71465d8204ca libxkutil/pool_parsing.c
--- a/libxkutil/pool_parsing.c Fri Oct 30 05:11:06 2009 -0700
+++ b/libxkutil/pool_parsing.c Mon Oct 26 07:47:48 2009 -0700
@@ -336,25 +336,29 @@
int res_type)
{
int ret = 0;
+ virStoragePoolPtr ptr = NULL;
+ virStorageVolPtr vptr = NULL;
if (res_type == CIM_RES_TYPE_IMAGE) {
- virStoragePoolPtr ptr = virStoragePoolLookupByName(conn, pname);
+ ptr = virStoragePoolLookupByName(conn, pname);
if (ptr == NULL) {
CU_DEBUG("Storage pool %s is not defined", pname);
goto out;
}
- virStorageVolPtr vptr = virStorageVolCreateXML(ptr, xml, 0);
- if (vptr == NULL)
+ vptr = virStorageVolCreateXML(ptr, xml, 0);
+ if (vptr == NULL) {
+ CU_DEBUG("Unable to create storage volume in %s",
+ pname);
goto out;
-
- virStorageVolFree(vptr);
- virStoragePoolFree(ptr);
+ }
ret = 1;
}
out:
+ virStoragePoolFree(ptr);
+ virStorageVolFree(vptr);
return ret;
}
diff -r a5cfc77fe352 -r 71465d8204ca src/Virt_ElementConformsToProfile.c
--- a/src/Virt_ElementConformsToProfile.c Fri Oct 30 05:11:06 2009 -0700
+++ b/src/Virt_ElementConformsToProfile.c Mon Oct 26 07:47:48 2009 -0700
@@ -199,7 +199,7 @@
conn = connect_by_classname(_BROKER, CLASSNAME(vref), &s);
if (conn == NULL)
- return s;
+ goto out;
for (i = 0; profiles[i] != NULL; i++) {
diff -r a5cfc77fe352 -r 71465d8204ca src/Virt_KVMRedirectionSAP.c
--- a/src/Virt_KVMRedirectionSAP.c Fri Oct 30 05:11:06 2009 -0700
+++ b/src/Virt_KVMRedirectionSAP.c Mon Oct 26 07:47:48 2009 -0700
@@ -316,7 +316,6 @@
for (i = 0; i < count; i++) {
if (!check_graphics(domain_list[i], &dominfo)) {
- virDomainFree(domain_list[i]);
cleanup_dominfo(&dominfo);
continue;
}
@@ -328,6 +327,7 @@
cu_statusf(broker, &s,
CMPI_RC_ERR_FAILED,
"Unable to guest's console port");
+ cleanup_dominfo(&dominfo);
goto out;
}
@@ -336,6 +336,7 @@
cu_statusf(broker, &s,
CMPI_RC_ERR_FAILED,
"Unable to allocate string");
+ cleanup_dominfo(&dominfo);
goto out;
}
@@ -343,7 +344,6 @@
port_list.list[port_list.cur]->remote_port = -1;
port_list.cur++;
- virDomainFree(domain_list[i]);
cleanup_dominfo(&dominfo);
}
@@ -355,6 +355,7 @@
goto out;
out:
+ free_domain_list(domain_list, count);
free(domain_list);
for (i = 0; i < count; i++) {
diff -r a5cfc77fe352 -r 71465d8204ca src/Virt_ResourcePoolConfigurationCapabilities.c
--- a/src/Virt_ResourcePoolConfigurationCapabilities.c Fri Oct 30 05:11:06 2009 -0700
+++ b/src/Virt_ResourcePoolConfigurationCapabilities.c Mon Oct 26 07:47:48 2009 -0700
@@ -70,17 +70,23 @@
pfx_from_conn(conn),
"ResourcePoolConfigurationCapabilities",
NAMESPACE(reference));
- if (inst == NULL)
+ if (inst == NULL) {
cu_statusf(_BROKER, &s,
CMPI_RC_ERR_FAILED,
- "Can't create ResourcePoolConfigurationCapabilities
instance");
+ "Can't create RPCC instance");
+ goto out;
+ }
CMSetProperty(inst, "InstanceID",
(CMPIValue *)"RPCC", CMPI_chars);
array = CMNewArray(_BROKER, 2, CMPI_uint32, &s);
- if (s.rc != CMPI_RC_OK)
- return s;
+ if (s.rc != CMPI_RC_OK) {
+ cu_statusf(_BROKER, &s,
+ CMPI_RC_ERR_FAILED,
+ "Can't create new CMPI array to store values");
+ goto out;
+ }
val = CreateChildResourcePool;
CMSetArrayElementAt(array, 0, (CMPIValue *)&val, CMPI_uint32);
diff -r a5cfc77fe352 -r 71465d8204ca src/Virt_VSMigrationCapabilities.c
--- a/src/Virt_VSMigrationCapabilities.c Fri Oct 30 05:11:06 2009 -0700
+++ b/src/Virt_VSMigrationCapabilities.c Mon Oct 26 07:47:48 2009 -0700
@@ -139,7 +139,7 @@
cu_statusf(broker, &s,
CMPI_RC_ERR_FAILED,
"Unable to get instance for %s", CLASSNAME(ref));
- return s;
+ goto out;
}
CMSetProperty(inst, "InstanceID",
diff -r a5cfc77fe352 -r 71465d8204ca src/Virt_VirtualSystemManagementService.c
--- a/src/Virt_VirtualSystemManagementService.c Fri Oct 30 05:11:06 2009 -0700
+++ b/src/Virt_VirtualSystemManagementService.c Mon Oct 26 07:47:48 2009 -0700
@@ -1695,6 +1695,8 @@
virDomainDestroy(dom); /* Okay for this to fail */
+ virDomainFree(dom);
+
dom = virDomainLookupByName(conn, dom_name);
if (dom == NULL) {
CU_DEBUG("Domain successfully destroyed");
noon
New subject: [PATCH 2 of 2] (#2) Fix seg fault in Virt_DevicePool - verify to be sure list is not NULL
# HG changeset patch
# User Kaitlin Rupert <karupert(a)us.ibm.com>
# Date 1256771106 25200
# Node ID 225d9f9a5cebaba93f4787558b35d6958cd2cbfb
# Parent 71465d8204cafbd92f63a1bb2f998b4df73fc156
(#2) Fix seg fault in Virt_DevicePool - verify to be sure list is not NULL
This can happen if _get_pools() is unable to connect to libvirt.
Updates:
-Since list.cur is an unsigned int, it can't be less than 0.
Signed-off-by: Kaitlin Rupert <karupert(a)us.ibm.com>
diff -r 71465d8204ca -r 225d9f9a5ceb src/Virt_DevicePool.c
--- a/src/Virt_DevicePool.c Mon Oct 26 07:47:48 2009 -0700
+++ b/src/Virt_DevicePool.c Wed Oct 28 16:05:06 2009 -0700
@@ -1210,6 +1210,14 @@
if (s.rc != CMPI_RC_OK)
goto out;
+ if (list.cur == 0) {
+ cu_statusf(broker, &s,
+ CMPI_RC_ERR_NOT_FOUND,
+ "No such instance (%s)",
+ id);
+ goto out;
+ }
+
*_inst = list.list[0];
out:
1:39 p.m.
+1
On 10/30/2009 03:00 PM, Kaitlin Rupert wrote:
These connection leaks were causing problems for me when testing on a
Fedora
rawhide system. The seg fault appeared when libvirt had reached its max
number of open connections and was dropping the provider's attempt to connect.
See second patch for updates.
_______________________________________________
Libvirt-cim mailing list
Libvirt-cim(a)redhat.com
https://www.redhat.com/mailman/listinfo/libvirt-cim
--
Richard Maciel, MSc
IBM Linux Technology Center
rmaciel(a)linux.vnet.ibm.com
5540
days inactive
5540
days old
3 comments
2 participants
participants (2)
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Kaitlin Rupert -
Richard Maciel