+ drivers-s390-net-use-memdup_user.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     drivers/s390/net: use memdup_user
has been added to the -mm tree.  Its filename is
     drivers-s390-net-use-memdup_user.patch

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*** Remember to use Documentation/SubmitChecklist when testing your code ***

See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: drivers/s390/net: use memdup_user
From: Julia Lawall <julia@diku.dk>

Use memdup_user when user data is immediately copied into the
allocated region.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@

-  to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+  to = memdup_user(from,size);
   if (
-      to==NULL
+      IS_ERR(to)
                 || ...) {
   <+... when != goto l1;
-  -ENOMEM
+  PTR_ERR(to)
   ...+>
   }
-  if (copy_from_user(to, from, size) != 0) {
-    <+... when != goto l2;
-    -EFAULT
-    ...+>
-  }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Ursula Braun <ursula.braun@de.ibm.com>
Cc: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/s390/net/qeth_core_main.c |   11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff -puN drivers/s390/net/qeth_core_main.c~drivers-s390-net-use-memdup_user drivers/s390/net/qeth_core_main.c
--- a/drivers/s390/net/qeth_core_main.c~drivers-s390-net-use-memdup_user
+++ a/drivers/s390/net/qeth_core_main.c
@@ -3764,15 +3764,10 @@ int qeth_snmp_command(struct qeth_card *
 	/* skip 4 bytes (data_len struct member) to get req_len */
 	if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
 		return -EFAULT;
-	ureq = kmalloc(req_len+sizeof(struct qeth_snmp_ureq_hdr), GFP_KERNEL);
-	if (!ureq) {
+	ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
+	if (IS_ERR(ureq)) {
 		QETH_DBF_TEXT(TRACE, 2, "snmpnome");
-		return -ENOMEM;
-	}
-	if (copy_from_user(ureq, udata,
-			req_len + sizeof(struct qeth_snmp_ureq_hdr))) {
-		kfree(ureq);
-		return -EFAULT;
+		return PTR_ERR(ureq);
 	}
 	qinfo.udata_len = ureq->hdr.data_len;
 	qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
_

Patches currently in -mm which might be from julia@diku.dk are

origin.patch
linux-next.patch
drivers-scsi-aacraid-eliminate-use-after-free.patch
arch-x86-pci-use-kasprintf.patch
drivers-scsi-libsas-use-sam_good.patch
drivers-scsi-remove-unnecessary-null-test.patch
drivers-message-move-dereference-after-null-test.patch
drivers-scsi-correct-the-size-argument-to-kmalloc.patch
drivers-char-ppdevc-use-kasprintf.patch
net-can-use-memdup_user.patch
drivers-net-use-memdup_user.patch
fs-btrfs-use-memdup_user.patch
drivers-video-via-use-memdup_user.patch
mm-use-memdup_user.patch
drivers-net-cxgb3-use-memdup_user.patch
drivers-net-wan-use-memdup_user.patch
drivers-block-use-memdup_user.patch
drivers-media-use-memdup_user.patch
drivers-infiniband-core-use-memdup_user.patch
drivers-i2c-use-memdup_user.patch
drivers-ieee1394-use-memdup_user.patch
fs-autofs4-use-memdup_user.patch
drivers-scsi-use-memdup_user.patch
drivers-char-applicomc-use-memdup_user.patch
drivers-char-vtc-use-memdup_user.patch
drivers-message-i2o-i2o_configc-use-memdup_user.patch
drivers-telephony-ixjc-use-memdup_user.patch
drivers-s390-net-use-memdup_user.patch
drivers-ide-use-memdup_user.patch
net-dccp-use-memdup_user.patch
drivers-net-wireless-prism54-use-memdup_user.patch
drivers-usb-gadget-use-memdup_user.patch
drivers-isdn-use-memdup_user.patch
drivers-staging-dream-camera-use-memdup_user.patch