From 4a97fa4f099b9ac82d0e0adbd2f63fccf3dd96fc Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 19 Jul 2020 09:22:12 +0200 Subject: [PATCH] sctp: pass a kernel pointer to sctp_setsockopt_pr_supported Use the kernel pointer that sctp_setsockopt has available instead of directly handling the user pointer. Signed-off-by: Christoph Hellwig Signed-off-by: David S. Miller --- net/sctp/socket.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 7beb26e5749d..245186327896 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -3925,24 +3925,20 @@ static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val, } static int sctp_setsockopt_pr_supported(struct sock *sk, - char __user *optval, + struct sctp_assoc_value *params, unsigned int optlen) { - struct sctp_assoc_value params; struct sctp_association *asoc; - if (optlen != sizeof(params)) + if (optlen != sizeof(*params)) return -EINVAL; - if (copy_from_user(¶ms, optval, optlen)) - return -EFAULT; - - 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)) return -EINVAL; - sctp_sk(sk)->ep->prsctp_enable = !!params.assoc_value; + sctp_sk(sk)->ep->prsctp_enable = !!params->assoc_value; return 0; } @@ -4691,7 +4687,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen); break; case SCTP_PR_SUPPORTED: - retval = sctp_setsockopt_pr_supported(sk, optval, optlen); + retval = sctp_setsockopt_pr_supported(sk, kopt, optlen); break; case SCTP_DEFAULT_PRINFO: retval = sctp_setsockopt_default_prinfo(sk, optval, optlen);