On Thu, 26 May 2011, Dan Carpenter wrote:
> There are a couple use after free bugs here.
>
> Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
> ---
> Compile tested only. Please review carefully.
>
> diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
> index ff3c644..b2f9a3a 100644
> --- a/drivers/hid/usbhid/hiddev.c
> +++ b/drivers/hid/usbhid/hiddev.c
> @@ -248,12 +248,15 @@ static int hiddev_release(struct inode * inode, struct file * file)
> usbhid_close(list->hiddev->hid);
> usbhid_put_power(list->hiddev->hid);
> } else {
> + mutex_unlock(&list->hiddev->existancelock);
> kfree(list->hiddev);
> + kfree(list);
> + return 0;
> }
> }
>
> - kfree(list);
> mutex_unlock(&list->hiddev->existancelock);
> + kfree(list);
Good catch.
> return 0;
> }
> @@ -926,7 +929,9 @@ void hiddev_disconnect(struct hid_device *hid)
> usbhid_close(hiddev->hid);
> wake_up_interruptible(&hiddev->wait);
> } else {
> + mutex_unlock(&hiddev->existancelock);
> kfree(hiddev);
> + return;
> }
> mutex_unlock(&hiddev->existancelock);
For this I already have a fix queued in my tree.
So I will be applying only the first hunk.
Thanks,
--
Jiri Kosina
SUSE Labs
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