NET: netpoll, fix potential NULL ptr dereference

Stanse found that one error path in netpoll_setup dereferences npinfo
even though it is NULL. Avoid that by adding new label and go to that
instead.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Daniel Borkmann <danborkmann@googlemail.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: chavey@google.com
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 7aa6972..d4ec38f 100644 (file)
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -735,7 +735,7 @@ int netpoll_setup(struct netpoll *np)
                npinfo = kmalloc(sizeof(*npinfo), GFP_KERNEL);
                if (!npinfo) {
                        err = -ENOMEM;
-                       goto release;
+                       goto put;
                }
 
                npinfo->rx_flags = 0;
@@ -845,7 +845,7 @@ int netpoll_setup(struct netpoll *np)
 
                kfree(npinfo);
        }
-
+put:
        dev_put(ndev);
        return err;
 }