openvswitch: Fix overreporting of drops in dropwatch

[ Upstream commit c21ab2afa2c64896a7f0e3cbc6845ec63dcfad2e ]

Currently queue_userspace_packet will call kfree_skb for all frames,
whether or not an error occurred. This can result in a single dropped
frame being reported as multiple drops in dropwatch. This functions
caller may also call kfree_skb in case of an error. This patch will
consume the skbs instead and allow caller's to use kfree_skb.

Signed-off-by: Mike Pattrick <mkp@redhat.com>
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2109957
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index f4b088d..46ef152 100644 (file)
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -557,8 +557,9 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
 out:
        if (err)
                skb_tx_error(skb);
-       kfree_skb(user_skb);
-       kfree_skb(nskb);
+       consume_skb(user_skb);
+       consume_skb(nskb);
+
        return err;
 }