diff options
Diffstat (limited to 'net/ethtool/netlink.c')
| -rw-r--r-- | net/ethtool/netlink.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 88d8a0243f35..a7346346114f 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -315,9 +315,9 @@ static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info) struct ethnl_req_info *req_info = NULL; const u8 cmd = info->genlhdr->cmd; const struct ethnl_request_ops *ops; + int hdr_len, reply_len; struct sk_buff *rskb; void *reply_payload; - int reply_len; int ret; ops = ethnl_default_requests[cmd]; @@ -346,15 +346,20 @@ static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info) ret = ops->reply_size(req_info, reply_data); if (ret < 0) goto err_cleanup; - reply_len = ret + ethnl_reply_header_size(); + reply_len = ret; ret = -ENOMEM; - rskb = ethnl_reply_init(reply_len, req_info->dev, ops->reply_cmd, + rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(), + req_info->dev, ops->reply_cmd, ops->hdr_attr, info, &reply_payload); if (!rskb) goto err_cleanup; + hdr_len = rskb->len; ret = ops->fill_reply(rskb, req_info, reply_data); if (ret < 0) goto err_msg; + WARN_ONCE(rskb->len - hdr_len > reply_len, + "ethnl cmd %d: calculated reply length %d, but consumed %d\n", + cmd, reply_len, rskb->len - hdr_len); if (ops->cleanup_data) ops->cleanup_data(reply_data); |