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sctp: pass a kernel pointer to sctp_setsockopt_recvnxtinfo

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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 09:22:11 +02:00 committed by David S. Miller
parent a98af7c84a
commit cfa6fde266
1 changed files with 3 additions and 8 deletions
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11
net/sctp/socket.c
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@ -3913,18 +3913,13 @@ static int sctp_setsockopt_recvrcvinfo(struct sock *sk, int *val,
return 0;
}
static int sctp_setsockopt_recvnxtinfo(struct sock *sk,
char __user *optval,
static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val,
unsigned int optlen)
{
int val;
if (optlen < sizeof(int))
return -EINVAL;
if (get_user(val, (int __user *) optval))
return -EFAULT;
sctp_sk(sk)->recvnxtinfo = (val == 0) ? 0 : 1;
sctp_sk(sk)->recvnxtinfo = (*val == 0) ? 0 : 1;
return 0;
}
@ -4693,7 +4688,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_recvrcvinfo(sk, kopt, optlen);
break;
case SCTP_RECVNXTINFO:
retval = sctp_setsockopt_recvnxtinfo(sk, optval, optlen);
retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen);
break;
case SCTP_PR_SUPPORTED:
retval = sctp_setsockopt_pr_supported(sk, optval, optlen);