From a42624669e1afd183a82dbfe7cc29cc1a403c1fe Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 19 Jul 2020 09:22:22 +0200 Subject: sctp: pass a kernel pointer to sctp_setsockopt_reuse_port 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 | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 6232e46c4cde..a5b95e68cc12 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4214,11 +4214,9 @@ static int sctp_setsockopt_interleaving_supported(struct sock *sk, return 0; } -static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval, +static int sctp_setsockopt_reuse_port(struct sock *sk, int *val, unsigned int optlen) { - int val; - if (!sctp_style(sk, TCP)) return -EOPNOTSUPP; @@ -4228,10 +4226,7 @@ static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval, if (optlen < sizeof(int)) return -EINVAL; - if (get_user(val, (int __user *)optval)) - return -EFAULT; - - sctp_sk(sk)->reuse = !!val; + sctp_sk(sk)->reuse = !!*val; return 0; } @@ -4645,7 +4640,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, optlen); break; case SCTP_REUSE_PORT: - retval = sctp_setsockopt_reuse_port(sk, optval, optlen); + retval = sctp_setsockopt_reuse_port(sk, kopt, optlen); break; case SCTP_EVENT: retval = sctp_setsockopt_event(sk, optval, optlen); -- cgit v1.2.3