sctp: use SCTP_FUTURE_ASSOC for SCTP_MAXSEG sockopt
Check with SCTP_FUTURE_ASSOC instead in sctp_set/getsockopt_maxseg, it's compatible with 0. Also check asoc_id early as other sctp setsockopts does. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -3322,7 +3322,7 @@ static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned
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current->comm, task_pid_nr(current));
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if (copy_from_user(&val, optval, optlen))
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return -EFAULT;
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params.assoc_id = 0;
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params.assoc_id = SCTP_FUTURE_ASSOC;
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} else if (optlen == sizeof(struct sctp_assoc_value)) {
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if (copy_from_user(¶ms, optval, optlen))
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return -EFAULT;
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@ -3332,6 +3332,9 @@ static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned
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}
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asoc = sctp_id2assoc(sk, params.assoc_id);
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if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
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sctp_style(sk, UDP))
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return -EINVAL;
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if (val) {
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int min_len, max_len;
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@ -3349,8 +3352,6 @@ static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned
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asoc->user_frag = val;
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sctp_assoc_update_frag_point(asoc);
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} else {
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if (params.assoc_id && sctp_style(sk, UDP))
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return -EINVAL;
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sp->user_frag = val;
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}
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@ -6503,7 +6504,7 @@ static int sctp_getsockopt_maxseg(struct sock *sk, int len,
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"Use of int in maxseg socket option.\n"
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"Use struct sctp_assoc_value instead\n",
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current->comm, task_pid_nr(current));
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params.assoc_id = 0;
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params.assoc_id = SCTP_FUTURE_ASSOC;
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} else if (len >= sizeof(struct sctp_assoc_value)) {
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len = sizeof(struct sctp_assoc_value);
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if (copy_from_user(¶ms, optval, len))
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@ -6512,7 +6513,8 @@ static int sctp_getsockopt_maxseg(struct sock *sk, int len,
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return -EINVAL;
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asoc = sctp_id2assoc(sk, params.assoc_id);
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if (!asoc && params.assoc_id && sctp_style(sk, UDP))
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if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
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sctp_style(sk, UDP))
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return -EINVAL;
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if (asoc)
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