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platform_kernel-5.15
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sctp: pass a kernel pointer to sctp_setsockopt_pr_supported 

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 09:22:12 +02:00 committed by David S. Miller
parent cfa6fde266
commit 4a97fa4f09
1 changed files with 6 additions and 10 deletions
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16
net/sctp/socket.c
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@ -3925,24 +3925,20 @@ static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val,
}
static int sctp_setsockopt_pr_supported(struct sock *sk,
char __user *optval,
struct sctp_assoc_value *params,
unsigned int optlen)
{
struct sctp_assoc_value params;
struct sctp_association *asoc;
if (optlen != sizeof(params))
if (optlen != sizeof(*params))
return -EINVAL;
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
asoc = sctp_id2assoc(sk, params.assoc_id);
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
asoc = sctp_id2assoc(sk, params->assoc_id);
if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
sctp_sk(sk)->ep->prsctp_enable = !!params.assoc_value;
sctp_sk(sk)->ep->prsctp_enable = !!params->assoc_value;
return 0;
}
@ -4691,7 +4687,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen);
break;
case SCTP_PR_SUPPORTED:
retval = sctp_setsockopt_pr_supported(sk, optval, optlen);
retval = sctp_setsockopt_pr_supported(sk, kopt, optlen);
break;
case SCTP_DEFAULT_PRINFO:
retval = sctp_setsockopt_default_prinfo(sk, optval, optlen);