[PATCH net] sctp: fix the missing put_user when dumping transport thresholds

[Xin Long]

This issue causes SCTP_PEER_ADDR_THLDS sockopt not to be able to dump
a transport thresholds info.

Fix it by adding 'goto' put_user in sctp_getsockopt_paddr_thresholds.

Fixes: 8add543e369d ("sctp: add SCTP_FUTURE_ASSOC for SCTP_PEER_ADDR_THLDS 
sockopt")
Signed-off-by: Xin Long <lucien....@gmail.com>
---
 net/sctp/socket.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 9d1f83b..ad87518 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -7173,7 +7173,7 @@ static int sctp_getsockopt_paddr_thresholds(struct sock 
*sk,
                val.spt_pathmaxrxt = trans->pathmaxrxt;
                val.spt_pathpfthld = trans->pf_retrans;
 
-               return 0;
+               goto out;
        }
 
        asoc = sctp_id2assoc(sk, val.spt_assoc_id);
@@ -7191,6 +7191,7 @@ static int sctp_getsockopt_paddr_thresholds(struct sock 
*sk,
                val.spt_pathmaxrxt = sp->pathmaxrxt;
        }
 
+out:
        if (put_user(len, optlen) || copy_to_user(optval, &val, len))
                return -EFAULT;
 
-- 
2.1.0