migration: Fix early failure cleanup
Avoid crash in cleanup after a very early migration failure
(possibly due to my 688a3dcba980bf01344a 'Route errors down ...')
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20180212160340.15333-2-dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
diff --git a/migration/ram.c b/migration/ram.c
index 8333d8e..7095c10 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1602,11 +1602,13 @@
static void ram_state_cleanup(RAMState **rsp)
{
- migration_page_queue_free(*rsp);
- qemu_mutex_destroy(&(*rsp)->bitmap_mutex);
- qemu_mutex_destroy(&(*rsp)->src_page_req_mutex);
- g_free(*rsp);
- *rsp = NULL;
+ if (*rsp) {
+ migration_page_queue_free(*rsp);
+ qemu_mutex_destroy(&(*rsp)->bitmap_mutex);
+ qemu_mutex_destroy(&(*rsp)->src_page_req_mutex);
+ g_free(*rsp);
+ *rsp = NULL;
+ }
}
static void xbzrle_cleanup(void)
