[Qemu-devel] [PATCH] net: Fix memory leak in net_param_nic()

[Thomas Huth <thuth@redhat.com>]

The early exits in case of errors leak the memory allocated for nd_id.
Fix it by using a "goto out" to the cleanup at the end of the function
instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 net/net.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/net.c b/net/net.c
index 29f8398..65457b7 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1502,11 +1502,12 @@ static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp)
         g_free(mac);
         if (ret) {
             error_setg(errp, "invalid syntax for ethernet address");
-            return -1;
+            goto out;
         }
         if (is_multicast_ether_addr(ni->macaddr.a)) {
             error_setg(errp, "NIC cannot have multicast MAC address");
-            return -1;
+            ret = -1;
+            goto out;
         }
     }
     qemu_macaddr_default_if_unset(&ni->macaddr);
@@ -1518,6 +1519,7 @@ static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp)
         nb_nics++;
     }
 
+out:
     g_free(nd_id);
     return ret;
 }
-- 
1.8.3.1