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sctp: pass a kernel pointer to sctp_setsockopt_reuse_port 

Use the kernel pointer that sctp_setsockopt has available instead of
directly handling the user pointer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-07-19 09:22:22 +02:00 committed by David S. Miller
parent 5b8d3b2446
commit a42624669e
1 changed files with 3 additions and 8 deletions
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11
net/sctp/socket.c
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@ -4214,11 +4214,9 @@ static int sctp_setsockopt_interleaving_supported(struct sock *sk,
return 0;
}
static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval,
static int sctp_setsockopt_reuse_port(struct sock *sk, int *val,
unsigned int optlen)
{
int val;
if (!sctp_style(sk, TCP))
return -EOPNOTSUPP;
@ -4228,10 +4226,7 @@ static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval,
if (optlen < sizeof(int))
return -EINVAL;
if (get_user(val, (int __user *)optval))
return -EFAULT;
sctp_sk(sk)->reuse = !!val;
sctp_sk(sk)->reuse = !!*val;
return 0;
}
@ -4645,7 +4640,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
optlen);
break;
case SCTP_REUSE_PORT:
retval = sctp_setsockopt_reuse_port(sk, optval, optlen);
retval = sctp_setsockopt_reuse_port(sk, kopt, optlen);
break;
case SCTP_EVENT:
retval = sctp_setsockopt_event(sk, optval, optlen);