l2tp: fix return value check
In case of error, the function genlmsg_put() returns NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. dpatch engine is used to auto generate this patch. (https://github.com/weiyj/dpatch) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -80,8 +80,8 @@ static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
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hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
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&l2tp_nl_family, 0, L2TP_CMD_NOOP);
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if (IS_ERR(hdr)) {
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ret = PTR_ERR(hdr);
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if (!hdr) {
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ret = -EMSGSIZE;
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goto err_out;
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}
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@ -250,8 +250,8 @@ static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
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hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags,
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L2TP_CMD_TUNNEL_GET);
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if (IS_ERR(hdr))
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return PTR_ERR(hdr);
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if (!hdr)
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return -EMSGSIZE;
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if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) ||
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nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) ||
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@ -617,8 +617,8 @@ static int l2tp_nl_session_send(struct sk_buff *skb, u32 pid, u32 seq, int flags
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sk = tunnel->sock;
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hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags, L2TP_CMD_SESSION_GET);
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if (IS_ERR(hdr))
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return PTR_ERR(hdr);
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if (!hdr)
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return -EMSGSIZE;
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if (nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) ||
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nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) ||
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