[PATCH 1/2] migration/rdma: fix potential nullptr access in rdma_start_incoming_migration

[Pan Nengyuan]

'rdma' is NULL when taking the first error branch in 
rdma_start_incoming_migration.
And it will cause a null pointer access in label 'err'. Fix that.

Fixes: 59c59c67ee6b0327ae932deb303caa47919aeb1e
Signed-off-by: Pan Nengyuan <address@hidden>
---
 migration/rdma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/migration/rdma.c b/migration/rdma.c
index 967fda5b0c..72e8b1c95b 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -4056,7 +4056,9 @@ void rdma_start_incoming_migration(const char *host_port, 
Error **errp)
     return;
 err:
     error_propagate(errp, local_err);
-    g_free(rdma->host);
+    if (rdma) {
+        g_free(rdma->host);
+    }
     g_free(rdma);
     g_free(rdma_return_path);
 }
-- 
2.18.2