appletalk: Set error code if register_snap_client failed

If register_snap_client fails in atalk_init,
error code should be set, otherwise it will
triggers NULL pointer dereference while unloading
module.

Fixes: 9804501fa122 ("appletalk: Fix potential NULL pointer dereference in unregister_snap_client")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 709d2542f7295ee71a5ddb201f81fed09ac669cb..dbe8b1993be9eec3c84e2be09602a5f471ed3f34 100644 (file)
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1920,6 +1920,7 @@ static int __init atalk_init(void)
        ddp_dl = register_snap_client(ddp_snap_id, atalk_rcv);
        if (!ddp_dl) {
                pr_crit("Unable to register DDP with SNAP.\n");
+               rc = -ENOMEM;
                goto out_sock;
        }