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authorChristoph Hellwig <hch@lst.de>2020-07-19 09:22:26 +0200
committerDavid S. Miller <davem@davemloft.net>2020-07-19 18:26:44 -0700
commit92c4f172552a37f1dbc385615b4497bd15df1d8f (patch)
tree766b264b5cb2d0a653b78103857fc6415dd44446 /net/sctp
parent963855a938cad73b950fb42fa5376e8ab3fd1475 (diff)
downloadlinux-92c4f172552a37f1dbc385615b4497bd15df1d8f.tar.bz2
sctp: pass a kernel pointer to sctp_setsockopt_ecn_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>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/socket.c18
1 files changed, 6 insertions, 12 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index ca369447237a..9f7f9aa50d4b 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4360,27 +4360,21 @@ out:
}
static int sctp_setsockopt_ecn_supported(struct sock *sk,
- char __user *optval,
+ struct sctp_assoc_value *params,
unsigned int optlen)
{
- struct sctp_assoc_value params;
struct sctp_association *asoc;
int retval = -EINVAL;
- if (optlen != sizeof(params))
- goto out;
-
- if (copy_from_user(&params, optval, optlen)) {
- retval = -EFAULT;
+ if (optlen != sizeof(*params))
goto out;
- }
- 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))
goto out;
- sctp_sk(sk)->ep->ecn_enable = !!params.assoc_value;
+ sctp_sk(sk)->ep->ecn_enable = !!params->assoc_value;
retval = 0;
out:
@@ -4635,7 +4629,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_auth_supported(sk, kopt, optlen);
break;
case SCTP_ECN_SUPPORTED:
- retval = sctp_setsockopt_ecn_supported(sk, optval, optlen);
+ retval = sctp_setsockopt_ecn_supported(sk, kopt, optlen);
break;
case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
retval = sctp_setsockopt_pf_expose(sk, optval, optlen);