diff options
| author | Julia Lawall <julia@diku.dk> | 2010-05-21 22:26:42 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-31 00:24:15 -0700 |
| commit | 024cb8a67f3d3438322fac9d6f7b1cc578eca71c (patch) | |
| tree | 23ba9dc417ae6a62aa3c9bbc2b07b0571ef28b6f /drivers/isdn/sc | |
| parent | 7d88950426da812a6ab93ee1bba821f7f0ec1766 (diff) | |
| download | kernel-common-024cb8a67f3d3438322fac9d6f7b1cc578eca71c.tar.gz kernel-common-024cb8a67f3d3438322fac9d6f7b1cc578eca71c.tar.bz2 kernel-common-024cb8a67f3d3438322fac9d6f7b1cc578eca71c.zip | |
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.c | 23 |
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", |