From 934253a7b4ab4151037ea9532552628723a14442 Mon Sep 17 00:00:00 2001 From: Shan Wei Date: Mon, 18 Apr 2011 19:13:18 +0000 Subject: [PATCH] sctp: use memdup_user to copy data from userspace Use common function to simply code. Signed-off-by: Shan Wei Signed-off-by: Vlad Yasevich Signed-off-by: Wei Yongjun Signed-off-by: David S. Miller --- net/sctp/socket.c | 22 ++++++---------------- 1 file changed, 6 insertions(+), 16 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index deb82e35a107..5c9980ae36bb 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -3215,14 +3215,9 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk, if (optlen < sizeof(struct sctp_hmacalgo)) return -EINVAL; - hmacs = kmalloc(optlen, GFP_KERNEL); - if (!hmacs) - return -ENOMEM; - - if (copy_from_user(hmacs, optval, optlen)) { - err = -EFAULT; - goto out; - } + hmacs= memdup_user(optval, optlen); + if (IS_ERR(hmacs)) + return PTR_ERR(hmacs); idents = hmacs->shmac_num_idents; if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS || @@ -3257,14 +3252,9 @@ static int sctp_setsockopt_auth_key(struct sock *sk, if (optlen <= sizeof(struct sctp_authkey)) return -EINVAL; - authkey = kmalloc(optlen, GFP_KERNEL); - if (!authkey) - return -ENOMEM; - - if (copy_from_user(authkey, optval, optlen)) { - ret = -EFAULT; - goto out; - } + authkey= memdup_user(optval, optlen); + if (IS_ERR(authkey)) + return PTR_ERR(authkey); if (authkey->sca_keylength > optlen - sizeof(struct sctp_authkey)) { ret = -EINVAL; -- 2.20.1