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authorChristoph Hellwig <hch@lst.de>2020-07-19 10:22:24 +0300
committerDavid S. Miller <davem@davemloft.net>2020-07-20 04:26:44 +0300
commit9263ac97af46e0f31ba38d730e45c64dc701954e (patch)
treedb34faa02194d16d93b99403d108be3a5027a71e /net
parent565059cb9b24bd7804948802ef38cc99c35c2c64 (diff)
downloadlinux-9263ac97af46e0f31ba38d730e45c64dc701954e.tar.xz
sctp: pass a kernel pointer to sctp_setsockopt_event
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')
-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 12a33fc42eee..b52acbf231ab 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4296,29 +4296,23 @@ static int sctp_setsockopt_event(struct sock *sk, struct sctp_event *param,
}
static int sctp_setsockopt_asconf_supported(struct sock *sk,
- char __user *optval,
+ struct sctp_assoc_value *params,
unsigned int optlen)
{
- struct sctp_assoc_value params;
struct sctp_association *asoc;
struct sctp_endpoint *ep;
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;
ep = sctp_sk(sk)->ep;
- ep->asconf_enable = !!params.assoc_value;
+ ep->asconf_enable = !!params->assoc_value;
if (ep->asconf_enable && ep->auth_enable) {
sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
@@ -4641,7 +4635,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_event(sk, kopt, optlen);
break;
case SCTP_ASCONF_SUPPORTED:
- retval = sctp_setsockopt_asconf_supported(sk, optval, optlen);
+ retval = sctp_setsockopt_asconf_supported(sk, kopt, optlen);
break;
case SCTP_AUTH_SUPPORTED:
retval = sctp_setsockopt_auth_supported(sk, optval, optlen);