Use the kernel pointer that sctp_setsockopt has available instead of
directly handling the user pointer.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
net/sctp/socket.c | 24 +++++++++++-------------
1 file changed, 11 insertions(+), 13 deletions(-)
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index deccfe54d2fc7d..d62c02d0b79346 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2832,24 +2832,22 @@ static int sctp_setsockopt_delayed_ack(struct sock *sk,
* by the change). With TCP-style sockets, this option is inherited by
* sockets derived from a listener socket.
*/
-static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen)
+static int sctp_setsockopt_initmsg(struct sock *sk, struct sctp_initmsg *sinit,
+ unsigned int optlen)
{
- struct sctp_initmsg sinit;
struct sctp_sock *sp = sctp_sk(sk);
if (optlen != sizeof(struct sctp_initmsg))
return -EINVAL;
- if (copy_from_user(&sinit, optval, optlen))
- return -EFAULT;
- if (sinit.sinit_num_ostreams)
- sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams;
- if (sinit.sinit_max_instreams)
- sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams;
- if (sinit.sinit_max_attempts)
- sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts;
- if (sinit.sinit_max_init_timeo)
- sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo;
+ if (sinit->sinit_num_ostreams)
+ sp->initmsg.sinit_num_ostreams = sinit->sinit_num_ostreams;
+ if (sinit->sinit_max_instreams)
+ sp->initmsg.sinit_max_instreams = sinit->sinit_max_instreams;
+ if (sinit->sinit_max_attempts)
+ sp->initmsg.sinit_max_attempts = sinit->sinit_max_attempts;
+ if (sinit->sinit_max_init_timeo)
+ sp->initmsg.sinit_max_init_timeo = sinit->sinit_max_init_timeo;
return 0;
}
@@ -4694,7 +4692,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
break;
case SCTP_INITMSG:
- retval = sctp_setsockopt_initmsg(sk, optval, optlen);
+ retval = sctp_setsockopt_initmsg(sk, kopt, optlen);
break;
case SCTP_DEFAULT_SEND_PARAM:
retval = sctp_setsockopt_default_send_param(sk, optval,
--
2.27.0
