[PATCH 16/49] sctp: pass a kernel pointer to sctp_setsockopt_rtoinfo
From: Christoph Hellwig <hch@lst.de>
Date: 2020-05-21 17:48:27
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 | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-)
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 99df37bbcb903..7998b25a8a271 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c@@ -3038,9 +3038,10 @@ static int sctp_setsockopt_nodelay(struct sock *sk, int *val, * be changed. * */ -static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen) +static int sctp_setsockopt_rtoinfo(struct sock *sk, + struct sctp_rtoinfo *rtoinfo, + unsigned int optlen) { - struct sctp_rtoinfo rtoinfo; struct sctp_association *asoc; unsigned long rto_min, rto_max; struct sctp_sock *sp = sctp_sk(sk);
@@ -3048,18 +3049,15 @@ static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigne if (optlen != sizeof (struct sctp_rtoinfo)) return -EINVAL; - if (copy_from_user(&rtoinfo, optval, optlen)) - return -EFAULT; - - asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); + asoc = sctp_id2assoc(sk, rtoinfo->srto_assoc_id); /* Set the values to the specific association */ - if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC && + if (!asoc && rtoinfo->srto_assoc_id != SCTP_FUTURE_ASSOC && sctp_style(sk, UDP)) return -EINVAL; - rto_max = rtoinfo.srto_max; - rto_min = rtoinfo.srto_min; + rto_max = rtoinfo->srto_max; + rto_min = rtoinfo->srto_min; if (rto_max) rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max;
@@ -3075,17 +3073,17 @@ static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigne return -EINVAL; if (asoc) { - if (rtoinfo.srto_initial != 0) + if (rtoinfo->srto_initial != 0) asoc->rto_initial = - msecs_to_jiffies(rtoinfo.srto_initial); + msecs_to_jiffies(rtoinfo->srto_initial); asoc->rto_max = rto_max; asoc->rto_min = rto_min; } else { /* If there is no association or the association-id = 0 * set the values to the endpoint. */ - if (rtoinfo.srto_initial != 0) - sp->rtoinfo.srto_initial = rtoinfo.srto_initial; + if (rtoinfo->srto_initial != 0) + sp->rtoinfo.srto_initial = rtoinfo->srto_initial; sp->rtoinfo.srto_max = rto_max; sp->rtoinfo.srto_min = rto_min; }
@@ -4689,7 +4687,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_nodelay(sk, kopt, optlen); break; case SCTP_RTOINFO: - retval = sctp_setsockopt_rtoinfo(sk, optval, optlen); + retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen); break; case SCTP_ASSOCINFO: retval = sctp_setsockopt_associnfo(sk, optval, optlen);
--
2.26.2