On 04/17/2012 12:55 PM, Stefan Berger wrote:
The below patch fixes the following memory leak.
==20624== 24 bytes in 2 blocks are definitely lost in loss record 532 of 1,867 ==20624== at 0x4A05E46: malloc (vg_replace_malloc.c:195) ==20624== by 0x38EC27FC01: strdup (strdup.c:43) ==20624== by 0x4EB6BA3: virDomainChrSourceDefCopy (domain_conf.c:1122) ==20624== by 0x495D76: qemuProcessFindCharDevicePTYs (qemu_process.c:1497) ==20624== by 0x498321: qemuProcessWaitForMonitor (qemu_process.c:1258) ==20624== by 0x49B5F9: qemuProcessStart (qemu_process.c:3652) ==20624== by 0x468B5C: qemuDomainObjStart (qemu_driver.c:4753) ==20624== by 0x469171: qemuDomainStartWithFlags (qemu_driver.c:4810) ==20624== by 0x4F21735: virDomainCreate (libvirt.c:8153) ==20624== by 0x4302BF: remoteDispatchDomainCreateHelper (remote_dispatch.h:852) ==20624== by 0x4F72C14: virNetServerProgramDispatch (virnetserverprogram.c:416) ==20624== by 0x4F6D690: virNetServerHandleJob (virnetserver.c:164) ==20624== by 0x4E8F43D: virThreadPoolWorker (threadpool.c:144) ==20624== by 0x4E8EAB5: virThreadHelper (threads-pthread.c:161) ==20624== by 0x38EC606CCA: start_thread (pthread_create.c:301) ==20624== by 0x38EC2E0C2C: clone (clone.S:115)
---
I am wondering whether 'something' did not work properly before due to the missing assignment below?
Very likely.
--- src/conf/domain_conf.c | 2 ++ 1 file changed, 2 insertions(+)
Index: libvirt-acl/src/conf/domain_conf.c =================================================================== --- libvirt-acl.orig/src/conf/domain_conf.c +++ libvirt-acl/src/conf/domain_conf.c @@ -1174,6 +1174,8 @@ virDomainChrSourceDefCopy(virDomainChrSo break; }
+ dest->type = src->type; +
ACK. No good writing into a union if you forget to also update the discriminator to say which branch of the union is active. The missing assignment definitely explains the memory leak. -- Eric Blake eblake@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org