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openvswitch: remove another BUG_ON() 

[ Upstream commit 8a574f8665 ]

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: aed067783e ("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>
5.4-rM2-2.2.x-imx-squashed
Paolo Abeni 2019-12-01 18:41:25 +01:00 committed by Greg Kroah-Hartman
parent 910d9e8839
commit ab46fb3ef6
1 changed files with 5 additions and 1 deletions
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6
net/openvswitch/datapath.c
View File

@ -1353,7 +1353,10 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
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_buff *skb, struct genl_info *info)
}
}
out_free:
ovs_flow_free(flow, true);
return 0;
unlock: