diff mbox

[net-next-2.6,5/8] sctp: use memdup_user to copy data from userspace

Message ID 4DAD19EE.1070707@cn.fujitsu.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Wei Yongjun April 19, 2011, 5:13 a.m. UTC 
From: Shan Wei <shanwei@cn.fujitsu.com>

Use common function to simply code.

Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
---
 net/sctp/socket.c |   22 ++++++----------------
 1 files changed, 6 insertions(+), 16 deletions(-)

Comments

David Miller April 20, 2011, 4:47 a.m. UTC | #1 
From: Wei Yongjun <yjwei@cn.fujitsu.com>
Date: Tue, 19 Apr 2011 13:13:18 +0800

> From: Shan Wei <shanwei@cn.fujitsu.com>
> 
> Use common function to simply code.
> 
> Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
> Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>

Applied.
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diff mbox

Patch

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index deb82e3..5c9980a 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;