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sctp: pass a kernel pointer to sctp_setsockopt_rtoinfo

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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 09:21:53 +02:00 committed by David S. Miller
parent f87ddbc0c0
commit af5ae60e42
1 changed files with 12 additions and 14 deletions
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26
net/sctp/socket.c
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@ -3041,9 +3041,10 @@ static int sctp_setsockopt_nodelay(struct sock *sk, int *val,
* be changed.
*
*/
static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen)
static int sctp_setsockopt_rtoinfo(struct sock *sk,
struct sctp_rtoinfo *rtoinfo,
unsigned int optlen)
{
struct sctp_rtoinfo rtoinfo;
struct sctp_association *asoc;
unsigned long rto_min, rto_max;
struct sctp_sock *sp = sctp_sk(sk);
@ -3051,18 +3052,15 @@ static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigne
if (optlen != sizeof (struct sctp_rtoinfo))
return -EINVAL;
if (copy_from_user(&rtoinfo, optval, optlen))
return -EFAULT;
asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id);
asoc = sctp_id2assoc(sk, rtoinfo->srto_assoc_id);
/* Set the values to the specific association */
if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC &&
if (!asoc && rtoinfo->srto_assoc_id != SCTP_FUTURE_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
rto_max = rtoinfo.srto_max;
rto_min = rtoinfo.srto_min;
rto_max = rtoinfo->srto_max;
rto_min = rtoinfo->srto_min;
if (rto_max)
rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max;
@ -3078,17 +3076,17 @@ static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigne
return -EINVAL;
if (asoc) {
if (rtoinfo.srto_initial != 0)
if (rtoinfo->srto_initial != 0)
asoc->rto_initial =
msecs_to_jiffies(rtoinfo.srto_initial);
msecs_to_jiffies(rtoinfo->srto_initial);
asoc->rto_max = rto_max;
asoc->rto_min = rto_min;
} else {
/* If there is no association or the association-id = 0
* set the values to the endpoint.
*/
if (rtoinfo.srto_initial != 0)
sp->rtoinfo.srto_initial = rtoinfo.srto_initial;
if (rtoinfo->srto_initial != 0)
sp->rtoinfo.srto_initial = rtoinfo->srto_initial;
sp->rtoinfo.srto_max = rto_max;
sp->rtoinfo.srto_min = rto_min;
}
@ -4692,7 +4690,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_nodelay(sk, kopt, optlen);
break;
case SCTP_RTOINFO:
retval = sctp_setsockopt_rtoinfo(sk, optval, optlen);
retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen);
break;
case SCTP_ASSOCINFO:
retval = sctp_setsockopt_associnfo(sk, optval, optlen);