get_user() may fail, if so return -EFAULT.
Signed-off-by: Kulikov Vasiliy <segooon@xxxxxxxxx>
---
sound/pci/asihpi/hpioctl.c | 17 +++++++++++++----
1 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/sound/pci/asihpi/hpioctl.c b/sound/pci/asihpi/hpioctl.c
index 3114999..62895a7 100644
--- a/sound/pci/asihpi/hpioctl.c
+++ b/sound/pci/asihpi/hpioctl.c
@@ -121,11 +121,17 @@ long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;
/* Read the message and response pointers from user space. */
- get_user(puhm, &phpi_ioctl_data->phm);
- get_user(puhr, &phpi_ioctl_data->phr);
+ if (get_user(puhm, &phpi_ioctl_data->phm) ||
+ get_user(puhr, &phpi_ioctl_data->phr)) {
+ err = -EFAULT;
+ goto out;
+ }
/* Now read the message size and data from user space. */
- get_user(hm->h.size, (u16 __user *)puhm);
+ if (get_user(hm->h.size, (u16 __user *)puhm)) {
+ err = -EFAULT;
+ goto out;
+ }
if (hm->h.size > sizeof(*hm))
hm->h.size = sizeof(*hm);
@@ -138,7 +144,10 @@ long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
goto out;
}
- get_user(res_max_size, (u16 __user *)puhr);
+ if (get_user(res_max_size, (u16 __user *)puhr)) {
+ err = -EFAULT;
+ goto out;
+ }
/* printk(KERN_INFO "user response size %d\n", res_max_size); */
if (res_max_size < sizeof(struct hpi_response_header)) {
HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
--
1.7.0.4
--
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