net/hyperv: fix possible memory leak in do_set_multicast()

do_set_multicast() may not free the memory malloc in
netvsc_set_multicast_list().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 462d05f05e84..1a1ca6cfc74a 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -68,11 +68,11 @@ static void do_set_multicast(struct work_struct *w)
 
         nvdev = hv_get_drvdata(ndevctx->device_ctx);
         if (nvdev == NULL)
-                return;
+                goto out;
 
         rdev = nvdev->extension;
         if (rdev == NULL)
-                return;
+                goto out;
 
         if (net->flags & IFF_PROMISC)
                 rndis_filter_set_packet_filter(rdev,
@@ -83,6 +83,7 @@ static void do_set_multicast(struct work_struct *w)
                         NDIS_PACKET_TYPE_ALL_MULTICAST |
                         NDIS_PACKET_TYPE_DIRECTED);
 
+out:
         kfree(w);
 }