Fix a problem with not allocating enough room for netlink messages.

diff --git a/datapath/datapath.c b/datapath/datapath.c
index 8ab30011c6f37f8678cf9894533f8978f268d0b0..89c576742928a9fdc59fbb4cf76f5ea838f30641 100644 (file)
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -105,7 +105,8 @@ alloc_openflow_skb(struct datapath *dp, size_t openflow_len, uint8_t type,
        struct nlattr *attr;
        struct ofp_header *oh;
 
-       genl_len = nla_total_size(sizeof(uint32_t)); /* DP_GENL_A_DP_IDX */
+       genl_len = nlmsg_total_size(GENL_HDRLEN + dp_genl_family.hdrsize);
+       genl_len += nla_total_size(sizeof(uint32_t)); /* DP_GENL_A_DP_IDX */
        genl_len += nla_total_size(openflow_len);    /* DP_GENL_A_OPENFLOW */
        skb = *pskb = genlmsg_new(genl_len, GFP_ATOMIC);
        if (!skb) {