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authorKulikov Vasiliy <segooon@gmail.com>2010-07-28 20:41:56 +0400
committerTakashi Iwai <tiwai@suse.de>2010-07-29 12:26:28 +0200
commitec9d04b2a8f00b14a3df4714820cb2cda46dc4d6 (patch)
treed7cf89c9f492480f78e0082ae28d9615267a283e /sound/pci/asihpi
parentb3390ceab95601afc12213c3ec5551d3bc7b638f (diff)
ALSA: asihpi: check return value of get_user()
get_user() may fail, if so return -EFAULT. Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/asihpi')
-rw-r--r--sound/pci/asihpi/hpioctl.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/sound/pci/asihpi/hpioctl.c b/sound/pci/asihpi/hpioctl.c
index 311499992a22..62895a719fcb 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);