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sctp: pass a kernel pointer to sctp_setsockopt_delayed_ack

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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 09:21:45 +02:00 committed by David S. Miller
parent 9b7b0d1a39
commit ebb25defdc
1 changed files with 22 additions and 27 deletions
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49
net/sctp/socket.c
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@ -2751,17 +2751,14 @@ static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info *params,
*/
static int sctp_setsockopt_delayed_ack(struct sock *sk,
char __user *optval, unsigned int optlen)
struct sctp_sack_info *params,
unsigned int optlen)
{
struct sctp_sock *sp = sctp_sk(sk);
struct sctp_association *asoc;
struct sctp_sack_info params;
if (optlen == sizeof(struct sctp_sack_info)) {
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
if (params.sack_delay == 0 && params.sack_freq == 0)
if (params->sack_delay == 0 && params->sack_freq == 0)
return 0;
} else if (optlen == sizeof(struct sctp_assoc_value)) {
pr_warn_ratelimited(DEPRECATED
@ -2769,59 +2766,57 @@ static int sctp_setsockopt_delayed_ack(struct sock *sk,
"Use of struct sctp_assoc_value in delayed_ack socket option.\n"
"Use struct sctp_sack_info instead\n",
current->comm, task_pid_nr(current));
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
if (params.sack_delay == 0)
params.sack_freq = 1;
if (params->sack_delay == 0)
params->sack_freq = 1;
else
params.sack_freq = 0;
params->sack_freq = 0;
} else
return -EINVAL;
/* Validate value parameter. */
if (params.sack_delay > 500)
if (params->sack_delay > 500)
return -EINVAL;
/* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
* socket is a one to many style socket, and an association
* was not found, then the id was invalid.
*/
asoc = sctp_id2assoc(sk, params.sack_assoc_id);
if (!asoc && params.sack_assoc_id > SCTP_ALL_ASSOC &&
asoc = sctp_id2assoc(sk, params->sack_assoc_id);
if (!asoc && params->sack_assoc_id > SCTP_ALL_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
if (asoc) {
sctp_apply_asoc_delayed_ack(&params, asoc);
sctp_apply_asoc_delayed_ack(params, asoc);
return 0;
}
if (sctp_style(sk, TCP))
params.sack_assoc_id = SCTP_FUTURE_ASSOC;
params->sack_assoc_id = SCTP_FUTURE_ASSOC;
if (params.sack_assoc_id == SCTP_FUTURE_ASSOC ||
params.sack_assoc_id == SCTP_ALL_ASSOC) {
if (params.sack_delay) {
sp->sackdelay = params.sack_delay;
if (params->sack_assoc_id == SCTP_FUTURE_ASSOC ||
params->sack_assoc_id == SCTP_ALL_ASSOC) {
if (params->sack_delay) {
sp->sackdelay = params->sack_delay;
sp->param_flags =
sctp_spp_sackdelay_enable(sp->param_flags);
}
if (params.sack_freq == 1) {
if (params->sack_freq == 1) {
sp->param_flags =
sctp_spp_sackdelay_disable(sp->param_flags);
} else if (params.sack_freq > 1) {
sp->sackfreq = params.sack_freq;
} else if (params->sack_freq > 1) {
sp->sackfreq = params->sack_freq;
sp->param_flags =
sctp_spp_sackdelay_enable(sp->param_flags);
}
}
if (params.sack_assoc_id == SCTP_CURRENT_ASSOC ||
params.sack_assoc_id == SCTP_ALL_ASSOC)
if (params->sack_assoc_id == SCTP_CURRENT_ASSOC ||
params->sack_assoc_id == SCTP_ALL_ASSOC)
list_for_each_entry(asoc, &sp->ep->asocs, asocs)
sctp_apply_asoc_delayed_ack(&params, asoc);
sctp_apply_asoc_delayed_ack(params, asoc);
return 0;
}
@ -4697,7 +4692,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
break;
case SCTP_DELAYED_SACK:
retval = sctp_setsockopt_delayed_ack(sk, optval, optlen);
retval = sctp_setsockopt_delayed_ack(sk, kopt, optlen);
break;
case SCTP_PARTIAL_DELIVERY_POINT:
retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen);