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 | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 2862047054d55a..874cec73153052 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3422,18 +3422,13 @@ static int sctp_setsockopt_context(struct sock *sk,
* application using the one to many model may become confused and act
* incorrectly.
*/
-static int sctp_setsockopt_fragment_interleave(struct sock *sk,
- char __user *optval,
+static int sctp_setsockopt_fragment_interleave(struct sock *sk, int *val,
unsigned int optlen)
{
- int val;
-
if (optlen != sizeof(int))
return -EINVAL;
- if (get_user(val, (int __user *)optval))
- return -EFAULT;
- sctp_sk(sk)->frag_interleave = !!val;
+ sctp_sk(sk)->frag_interleave = !!*val;
if (!sctp_sk(sk)->frag_interleave)
sctp_sk(sk)->ep->intl_enable = 0;
@@ -4701,7 +4696,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_context(sk, kopt, optlen);
break;
case SCTP_FRAGMENT_INTERLEAVE:
- retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen);
+ retval = sctp_setsockopt_fragment_interleave(sk, kopt, optlen);
break;
case SCTP_MAX_BURST:
retval = sctp_setsockopt_maxburst(sk, optval, optlen);
--
2.27.0
