[PATCH 39/49] sctp: pass a kernel pointer to sctp_setsockopt_reset_assoc
From: Christoph Hellwig <hch@lst.de>
Date: 2020-05-21 17:49:18
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 | 25 +++++++------------------ 1 file changed, 7 insertions(+), 18 deletions(-)
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 70451a9177407..185c07916281c 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c@@ -4079,30 +4079,19 @@ static int sctp_setsockopt_reset_streams(struct sock *sk, return sctp_send_reset_streams(asoc, params); } -static int sctp_setsockopt_reset_assoc(struct sock *sk, - char __user *optval, +static int sctp_setsockopt_reset_assoc(struct sock *sk, sctp_assoc_t *associd, unsigned int optlen) { struct sctp_association *asoc; - sctp_assoc_t associd; - int retval = -EINVAL; - - if (optlen != sizeof(associd)) - goto out; - if (copy_from_user(&associd, optval, optlen)) { - retval = -EFAULT; - goto out; - } + if (optlen != sizeof(*associd)) + return -EINVAL; - asoc = sctp_id2assoc(sk, associd); + asoc = sctp_id2assoc(sk, *associd); if (!asoc) - goto out; - - retval = sctp_send_reset_assoc(asoc); + return -EINVAL; -out: - return retval; + return sctp_send_reset_assoc(asoc); } static int sctp_setsockopt_add_streams(struct sock *sk,
@@ -4671,7 +4660,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_reset_streams(sk, kopt, optlen); break; case SCTP_RESET_ASSOC: - retval = sctp_setsockopt_reset_assoc(sk, optval, optlen); + retval = sctp_setsockopt_reset_assoc(sk, kopt, optlen); break; case SCTP_ADD_STREAMS: retval = sctp_setsockopt_add_streams(sk, optval, optlen);
--
2.26.2