diff options
Diffstat (limited to 'drivers/hid/hidraw.c')
| -rw-r--r-- | drivers/hid/hidraw.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c index 9c2d7c23f296..f0e2757cb909 100644 --- a/drivers/hid/hidraw.c +++ b/drivers/hid/hidraw.c @@ -34,6 +34,7 @@ #include <linux/hid.h> #include <linux/mutex.h> #include <linux/sched.h> +#include <linux/string.h> #include <linux/hidraw.h> @@ -123,7 +124,6 @@ static ssize_t hidraw_send_report(struct file *file, const char __user *buffer, dev = hidraw_table[minor]->hid; - if (count > HID_MAX_BUFFER_SIZE) { hid_warn(dev, "pid %d passed too large report\n", task_pid_nr(current)); @@ -138,17 +138,12 @@ static ssize_t hidraw_send_report(struct file *file, const char __user *buffer, goto out; } - buf = kmalloc(count * sizeof(__u8), GFP_KERNEL); - if (!buf) { - ret = -ENOMEM; + buf = memdup_user(buffer, count); + if (IS_ERR(buf)) { + ret = PTR_ERR(buf); goto out; } - if (copy_from_user(buf, buffer, count)) { - ret = -EFAULT; - goto out_free; - } - if ((report_type == HID_OUTPUT_REPORT) && !(dev->quirks & HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP)) { ret = hid_hw_output_report(dev, buf, count); @@ -587,14 +582,13 @@ int __init hidraw_init(void) result = alloc_chrdev_region(&dev_id, HIDRAW_FIRST_MINOR, HIDRAW_MAX_DEVICES, "hidraw"); - - hidraw_major = MAJOR(dev_id); - if (result < 0) { pr_warn("can't get major number\n"); goto out; } + hidraw_major = MAJOR(dev_id); + hidraw_class = class_create(THIS_MODULE, "hidraw"); if (IS_ERR(hidraw_class)) { result = PTR_ERR(hidraw_class); |