From: YueHaibing <yuehaibing@xxxxxxxxxx>
commit c93ad1337ad06a718890a89cdd85188ff9a5a5cc upstream.
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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/appletalk/ddp.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1927,6 +1927,7 @@ 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;
}
