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Commit cc1a7c4b authored by Al Viro's avatar Al Viro
Browse files

usbdevfs: get rid of field-by-field copyin 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 30138384

drivers/usb/core/devio.c

+19 −29
Original line number Diff line number Diff line
@@ -1966,27 +1966,21 @@ static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *a 
static int get_urb32(struct usbdevfs_urb *kurb,

		     struct usbdevfs_urb32 __user *uurb)

{

	__u32  uptr;

	if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||

	    __get_user(kurb->type, &uurb->type) ||

	    __get_user(kurb->endpoint, &uurb->endpoint) ||

	    __get_user(kurb->status, &uurb->status) ||

	    __get_user(kurb->flags, &uurb->flags) ||

	    __get_user(kurb->buffer_length, &uurb->buffer_length) ||

	    __get_user(kurb->actual_length, &uurb->actual_length) ||

	    __get_user(kurb->start_frame, &uurb->start_frame) ||

	    __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||

	    __get_user(kurb->error_count, &uurb->error_count) ||

	    __get_user(kurb->signr, &uurb->signr))

	struct usbdevfs_urb32 urb32;

	if (copy_from_user(&urb32, uurb, sizeof(*uurb)))

		return -EFAULT;



	if (__get_user(uptr, &uurb->buffer))

		return -EFAULT;

	kurb->buffer = compat_ptr(uptr);

	if (__get_user(uptr, &uurb->usercontext))

		return -EFAULT;

	kurb->usercontext = compat_ptr(uptr);



	kurb->type = urb32.type;

	kurb->endpoint = urb32.endpoint;

	kurb->status = urb32.status;

	kurb->flags = urb32.flags;

	kurb->buffer = compat_ptr(urb32.buffer);

	kurb->buffer_length = urb32.buffer_length;

	kurb->actual_length = urb32.actual_length;

	kurb->start_frame = urb32.start_frame;

	kurb->number_of_packets = urb32.number_of_packets;

	kurb->error_count = urb32.error_count;

	kurb->signr = urb32.signr;

	kurb->usercontext = compat_ptr(urb32.usercontext);

	return 0;

}
@@ -2198,18 +2192,14 @@ static int proc_ioctl_default(struct usb_dev_state *ps, void __user *arg) 
#ifdef CONFIG_COMPAT

static int proc_ioctl_compat(struct usb_dev_state *ps, compat_uptr_t arg)

{

	struct usbdevfs_ioctl32 __user *uioc;

	struct usbdevfs_ioctl32 ioc32;

	struct usbdevfs_ioctl ctrl;

	u32 udata;



	uioc = compat_ptr((long)arg);

	if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||

	    __get_user(ctrl.ifno, &uioc->ifno) ||

	    __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||

	    __get_user(udata, &uioc->data))

	if (copy_from_user(&ioc32, compat_ptr(arg), sizeof(ioc32)))

		return -EFAULT;

	ctrl.data = compat_ptr(udata);



	ctrl.ifno = ioc32.ifno;

	ctrl.ioctl_code = ioc32.ioctl_code;

	ctrl.data = compat_ptr(ioc32.data);

	return proc_ioctl(ps, &ctrl);

}

#endif