diff options
| -rw-r--r-- | drivers/isdn/i4l/isdn_ppp.c | 11 | ||||
| -rw-r--r-- | drivers/isdn/pcbit/drv.c | 10 | ||||
| -rw-r--r-- | drivers/isdn/sc/ioctl.c | 23 |
3 files changed, 12 insertions, 32 deletions
diff --git a/drivers/isdn/i4l/isdn_ppp.c b/drivers/isdn/i4l/isdn_ppp.c index f37b8f6..8c46bae 100644 --- a/drivers/isdn/i4l/isdn_ppp.c +++ b/drivers/isdn/i4l/isdn_ppp.c @@ -449,14 +449,9 @@ static int get_filter(void __user *arg, struct sock_filter **p) /* uprog.len is unsigned short, so no overflow here */ len = uprog.len * sizeof(struct sock_filter); - code = kmalloc(len, GFP_KERNEL); - if (code == NULL) - return -ENOMEM; - - if (copy_from_user(code, uprog.filter, len)) { - kfree(code); - return -EFAULT; - } + code = memdup_user(uprog.filter, len); + if (IS_ERR(code)) + return PTR_ERR(code); err = sk_chk_filter(code, uprog.len); if (err) { diff --git a/drivers/isdn/pcbit/drv.c b/drivers/isdn/pcbit/drv.c index 123c1d6..1507d2e 100644 --- a/drivers/isdn/pcbit/drv.c +++ b/drivers/isdn/pcbit/drv.c @@ -411,14 +411,10 @@ static int pcbit_writecmd(const u_char __user *buf, int len, int driver, int cha return -EINVAL; } - cbuf = kmalloc(len, GFP_KERNEL); - if (!cbuf) - return -ENOMEM; + cbuf = memdup_user(buf, len); + if (IS_ERR(cbuf)) + return PTR_ERR(cbuf); - if (copy_from_user(cbuf, buf, len)) { - kfree(cbuf); - return -EFAULT; - } memcpy_toio(dev->sh_mem, cbuf, len); kfree(cbuf); return len; diff --git a/drivers/isdn/sc/ioctl.c b/drivers/isdn/sc/ioctl.c index 1081091..43c5dc35 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", |