From 4986f3f01aca9a332fa8e0fc9fdf3338791ee374 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Thu, 22 Jul 2010 23:15:09 +0000 Subject: qeth: 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/) // @@ 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 - ...+> - } // Signed-off-by: Julia Lawall Signed-off-by: Andrew Morton Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- drivers/s390/net/qeth_core_main.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) (limited to 'drivers/s390') diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 6d51494a7f29..3a5a18a0fc28 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -3748,15 +3748,10 @@ int qeth_snmp_command(struct qeth_card *card, char __user *udata) /* 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_CARD_TEXT(card, 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); -- cgit v1.2.3-59-g8ed1b