[libvirt] [PATCH] remote: avoid memory leak on successful path

[ajia at redhat.com]

From: Alex Jia <ajia at redhat.com>

when everything is okay, 'rv' will be 0, however, 'cleanup' lable only free
allocated memory with 'rv < 0', so memory leak on successful path. The patch
uses new virTypedParameterArrayClear function to free memory instead.

* src/remote/remote_driver.c: fix memory leak on remoteDeserializeTypedParameters. 

* Detected by valgrind:

==31957== 1 bytes in 1 blocks are definitely lost in loss record 1 of 2,097
==31957==    at 0x4A05FDE: malloc (vg_replace_malloc.c:236)
==31957==    by 0x39CF07F6E1: strdup (in /lib64/libc-2.12.so)
==31957==    by 0xD84CDA1: remoteDeserializeTypedParameters.clone.0 (remote_driver.c:1404)
==31957==    by 0xD84D11B: remoteDomainGetNumaParameters (remote_driver.c:1566)
==31957==    by 0xD81EBFA: virDomainGetNumaParameters (libvirt.c:3887)
==31957==    by 0xD4F8E25: libvirt_virDomainGetNumaParameters (libvirt-override.c:1127)
==31957==    by 0x39E1ADE7F3: PyEval_EvalFrameEx (ceval.c:3794)
==31957==    by 0x39E1ADF99E: PyEval_EvalFrameEx (ceval.c:3880)
==31957==    by 0x39E1AE0466: PyEval_EvalCodeEx (ceval.c:3044)
==31957==    by 0x39E1AE0541: PyEval_EvalCode (ceval.c:545)
==31957==    by 0x39E1AFB88B: run_mod (pythonrun.c:1351)
==31957==    by 0x39E1AFB95F: PyRun_FileExFlags (pythonrun.c:1337)


Signed-off-by: Alex Jia <ajia at redhat.com>
---
 src/remote/remote_driver.c |    7 +------
 1 files changed, 1 insertions(+), 6 deletions(-)

diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index e28840b..cfbcd0f 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -1417,12 +1417,7 @@ remoteDeserializeTypedParameters(remote_typed_param *ret_params_val,
     rv = 0;
 
 cleanup:
-    if (rv < 0) {
-        int j;
-        for (j = 0; j < i; j++)
-            if (params[j].type == VIR_TYPED_PARAM_STRING)
-                VIR_FREE(params[j].value.s);
-    }
+    virTypedParameterArrayClear(params, *nparams);
     return rv;
 }
 
-- 
1.7.1