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authorJulia Lawall <julia@diku.dk>2010-05-21 22:26:42 +0000
committerDavid S. Miller <davem@davemloft.net>2010-05-31 00:24:15 -0700
commit024cb8a67f3d3438322fac9d6f7b1cc578eca71c (patch)
tree23ba9dc417ae6a62aa3c9bbc2b07b0571ef28b6f /drivers/isdn/sc
parent7d88950426da812a6ab93ee1bba821f7f0ec1766 (diff)
drivers/isdn: Use memdup_user
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> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn/sc')
-rw-r--r--drivers/isdn/sc/ioctl.c23
1 files changed, 6 insertions, 17 deletions
diff --git a/drivers/isdn/sc/ioctl.c b/drivers/isdn/sc/ioctl.c
index 1081091bbfaf..43c5dc3516e5 100644
--- a/drivers/isdn/sc/ioctl.c
+++ b/drivers/isdn/sc/ioctl.c
@@ -215,19 +215,13 @@ int sc_ioctl(int card, scs_ioctl *data)
pr_debug("%s: DCBIOSETSPID: ioctl received\n",
sc_adapter[card]->devicename);
- spid = kmalloc(SCIOC_SPIDSIZE, GFP_KERNEL);
- if(!spid) {
- kfree(rcvmsg);
- return -ENOMEM;
- }
-
/*
* Get the spid from user space
*/
- if (copy_from_user(spid, data->dataptr, SCIOC_SPIDSIZE)) {
+ spid = memdup_user(data->dataptr, SCIOC_SPIDSIZE);
+ if (IS_ERR(spid)) {
kfree(rcvmsg);
- kfree(spid);
- return -EFAULT;
+ return PTR_ERR(spid);
}
pr_debug("%s: SCIOCSETSPID: setting channel %d spid to %s\n",
@@ -296,18 +290,13 @@ int sc_ioctl(int card, scs_ioctl *data)
pr_debug("%s: SCIOSETDN: ioctl received\n",
sc_adapter[card]->devicename);
- dn = kmalloc(SCIOC_DNSIZE, GFP_KERNEL);
- if (!dn) {
- kfree(rcvmsg);
- return -ENOMEM;
- }
/*
* Get the spid from user space
*/
- if (copy_from_user(dn, data->dataptr, SCIOC_DNSIZE)) {
+ dn = memdup_user(data->dataptr, SCIOC_DNSIZE);
+ if (IS_ERR(dn)) {
kfree(rcvmsg);
- kfree(dn);
- return -EFAULT;
+ return PTR_ERR(dn);
}
pr_debug("%s: SCIOCSETDN: setting channel %d dn to %s\n",