[PATCH 04/51] sctp: pass a kernel pointer to sctp_setsockopt_disable_fragments

[Christoph Hellwig]

Use the kernel pointer that sctp_setsockopt has available instead of
directly handling the user pointer.

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 net/sctp/socket.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 44cf2848146a91..b259ea94aeddef 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2184,20 +2184,12 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr 
*msg, size_t len,
  * exceeds the current PMTU size, the message will NOT be sent and
  * instead a error will be indicated to the user.
  */
-static int sctp_setsockopt_disable_fragments(struct sock *sk,
-                                            char __user *optval,
+static int sctp_setsockopt_disable_fragments(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)->disable_fragments = (val == 0) ? 0 : 1;
-
+       sctp_sk(sk)->disable_fragments = (*val == 0) ? 0 : 1;
        return 0;
 }
 
@@ -4701,7 +4693,7 @@ static int sctp_setsockopt(struct sock *sk, int level, 
int optname,
                break;
 
        case SCTP_DISABLE_FRAGMENTS:
-               retval = sctp_setsockopt_disable_fragments(sk, optval, optlen);
+               retval = sctp_setsockopt_disable_fragments(sk, kopt, optlen);
                break;
 
        case SCTP_EVENTS:
-- 
2.27.0