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sctp: pass a kernel pointer to sctp_setsockopt_partial_delivery_point

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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 09:21:46 +02:00 committed by David S. Miller
parent ebb25defdc
commit bb13d647d9
1 changed files with 4 additions and 9 deletions
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13
net/sctp/socket.c
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@ -3487,24 +3487,19 @@ static int sctp_setsockopt_fragment_interleave(struct sock *sk,
* call as long as the user provided buffer is large enough to hold the
* message.
*/
static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
char __user *optval,
static int sctp_setsockopt_partial_delivery_point(struct sock *sk, u32 *val,
unsigned int optlen)
{
u32 val;
if (optlen != sizeof(u32))
return -EINVAL;
if (get_user(val, (int __user *)optval))
return -EFAULT;
/* Note: We double the receive buffer from what the user sets
* it to be, also initial rwnd is based on rcvbuf/2.
*/
if (val > (sk->sk_rcvbuf >> 1))
if (*val > (sk->sk_rcvbuf >> 1))
return -EINVAL;
sctp_sk(sk)->pd_point = val;
sctp_sk(sk)->pd_point = *val;
return 0; /* is this the right error code? */
}
@ -4695,7 +4690,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_delayed_ack(sk, kopt, optlen);
break;
case SCTP_PARTIAL_DELIVERY_POINT:
retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen);
retval = sctp_setsockopt_partial_delivery_point(sk, kopt, optlen);
break;
case SCTP_INITMSG: