From: Paolo Abeni pabeni@redhat.com
[ Upstream commit 8a574f86652a4540a2433946ba826ccb87f398cc ]
If we can't build the flow del notification, we can simply delete the flow, no need to crash the kernel. Still keep a WARN_ON to preserve debuggability.
Note: the BUG_ON() predates the Fixes tag, but this change can be applied only after the mentioned commit.
v1 -> v2: - do not leak an skb on error
Fixes: aed067783e50 ("openvswitch: Minimize ovs_flow_cmd_del critical section.") Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/openvswitch/datapath.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -1353,7 +1353,10 @@ static int ovs_flow_cmd_del(struct sk_bu OVS_FLOW_CMD_DEL, ufid_flags); rcu_read_unlock(); - BUG_ON(err < 0); + if (WARN_ON_ONCE(err < 0)) { + kfree_skb(reply); + goto out_free; + }
ovs_notify(&dp_flow_genl_family, reply, info); } else { @@ -1361,6 +1364,7 @@ static int ovs_flow_cmd_del(struct sk_bu } }
+out_free: ovs_flow_free(flow, true); return 0; unlock: