[PATCH 34/49] sctp: pass a kernel pointer to sctp_setsockopt_pr_supported
From: Christoph Hellwig <hch@lst.de>
Date: 2020-05-21 17:49:06
Also in:
linux-sctp
Subsystem:
networking [general], sctp protocol, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Marcelo Ricardo Leitner, Xin Long, Linus Torvalds
Use the kernel pointer that sctp_setsockopt has available instead of directly handling the user pointer. Signed-off-by: Christoph Hellwig <hch@lst.de> --- 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 fe8d1ea7d9c35..fb7ed11382af1 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c@@ -3921,24 +3921,20 @@ 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; }
@@ -4687,7 +4683,7 @@ 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);
--
2.26.2