Re: [Xen-devel] [PATCH 1/3] libxl: fix ref counting of libxlMigrationDstArgs

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On 07/29/2015 04:07 PM, Jim Fehlig wrote:
On 07/20/2015 09:28 AM, Olaf Hering wrote:
On Thu, Jul 16, Jim Fehlig wrote:

@@ -448,6 +438,8 @@ libxlDomainMigrationPrepare(virConnectPtr dconn,
          virObjectUnref(socks[i]);
      }
      VIR_FREE(socks);
+    virObjectUnref(args);
This is now below the 'error' label, so args has to be initialized.

[  149s] libxl/libxl_migration.c: In function 'libxlDomainMigrationPrepare':
[ 149s] libxl/libxl_migration.c:463:19: warning: 'args' may be used uninitialized in this function [-Wmaybe-uninitialized]
[  149s]      virObjectUnref(args);
[  149s]                    ^

Opps. I've squashed in the below obvious fix. Note it is safe to call virObjectUnref with a NULL object.

Actually add the diff this time...



Any other comments on this series? It fixes bugs in migration, including a possible libvirtd crash, and would be a candidate to push during freeze IMO.

diff --git a/src/libxl/libxl_migration.c b/src/libxl/libxl_migration.c
index 4349f02..f9673c8 100644
--- a/src/libxl/libxl_migration.c
+++ b/src/libxl/libxl_migration.c
@@ -318,7 +318,7 @@ libxlDomainMigrationPrepare(virConnectPtr dconn,
     virNetSocketPtr *socks = NULL;
     size_t nsocks = 0;
     int nsocks_listen = 0;
-    libxlMigrationDstArgs *args;
+    libxlMigrationDstArgs *args = NULL;
     size_t i;
     int ret = -1;


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