diff mbox series

[20/49] sctp: pass a kernel pointer to sctp_setsockopt_adaptation_layer

Message ID 20200521174724.2635475-21-hch@lst.de
State New
Headers show
Series None | expand

Commit Message

Christoph Hellwig May 21, 2020, 5:46 p.m. UTC 
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 | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 4374d4fff080a..b7bf09f86a5e7 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3333,17 +3333,14 @@  static int sctp_setsockopt_peer_primary_addr(struct sock *sk,
 	return err;
 }
 
-static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval,
+static int sctp_setsockopt_adaptation_layer(struct sock *sk,
+					    struct sctp_setadaptation *adapt,
 					    unsigned int optlen)
 {
-	struct sctp_setadaptation adaptation;
-
 	if (optlen != sizeof(struct sctp_setadaptation))
 		return -EINVAL;
-	if (copy_from_user(&adaptation, optval, optlen))
-		return -EFAULT;
 
-	sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind;
+	sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind;
 
 	return 0;
 }
@@ -4697,7 +4694,7 @@  static int sctp_setsockopt(struct sock *sk, int level, int optname,
 		retval = sctp_setsockopt_maxseg(sk, kopt, optlen);
 		break;
 	case SCTP_ADAPTATION_LAYER:
-		retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen);
+		retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen);
 		break;
 	case SCTP_CONTEXT:
 		retval = sctp_setsockopt_context(sk, optval, optlen);