From 93cf9b909efb773f74b5d87659d41f957ccbce7e Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Mon, 30 Jul 2007 17:09:28 -0400 Subject: [PATCH] USB: avoid urb->pipe in usbfs This patch (as948) removes most of the references to urb->pipe from the usbfs routines in devio.c. The one tricky aspect is in snoop_urb(), which can be called before the URB is submitted and which uses usb_urb_dir_in(). For this to work properly, the URB's direction flag must be set manually in proc_do_submiturb(). The patch also fixes a minor bug; the wValue, wIndex, and wLength fields were snooped in proc_do_submiturb() without conversion from le16 to CPU-byte-ordering. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/devio.c | 69 ++++++++++++++++++++++++---------------- 1 file changed, 41 insertions(+), 28 deletions(-) diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 927a181120..b9f1edd6af 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -289,10 +289,8 @@ static void snoop_urb(struct urb *urb, void __user *userurb) if (!usbfs_snoop) return; - if (urb->pipe & USB_DIR_IN) - dev_info(&urb->dev->dev, "direction=IN\n"); - else - dev_info(&urb->dev->dev, "direction=OUT\n"); + dev_info(&urb->dev->dev, "direction=%s\n", + usb_urb_dir_in(urb) ? "IN" : "OUT"); dev_info(&urb->dev->dev, "userurb=%p\n", userurb); dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", urb->transfer_buffer_length); @@ -910,6 +908,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, struct usb_ctrlrequest *dr = NULL; unsigned int u, totlen, isofrmlen; int ret, ifnum = -1; + int is_in; if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| URB_NO_FSBR|URB_ZERO_PACKET)) @@ -924,16 +923,18 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, if ((ret = checkintf(ps, ifnum))) return ret; } - if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) - ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; - else - ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; + if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { + is_in = 1; + ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; + } else { + is_in = 0; + ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; + } if (!ep) return -ENOENT; switch(uurb->type) { case USBDEVFS_URB_TYPE_CONTROL: - if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) - != USB_ENDPOINT_XFER_CONTROL) + if (!usb_endpoint_xfer_control(&ep->desc)) return -EINVAL; /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */ if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) @@ -952,23 +953,32 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, kfree(dr); return ret; } - uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); uurb->number_of_packets = 0; uurb->buffer_length = le16_to_cpup(&dr->wLength); uurb->buffer += 8; - if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { + if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { + is_in = 1; + uurb->endpoint |= USB_DIR_IN; + } else { + is_in = 0; + uurb->endpoint &= ~USB_DIR_IN; + } + if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, + uurb->buffer, uurb->buffer_length)) { kfree(dr); return -EFAULT; } snoop(&ps->dev->dev, "control urb: bRequest=%02x " "bRrequestType=%02x wValue=%04x " "wIndex=%04x wLength=%04x\n", - dr->bRequest, dr->bRequestType, dr->wValue, - dr->wIndex, dr->wLength); + dr->bRequest, dr->bRequestType, + __le16_to_cpup(&dr->wValue), + __le16_to_cpup(&dr->wIndex), + __le16_to_cpup(&dr->wLength)); break; case USBDEVFS_URB_TYPE_BULK: - switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { + switch (usb_endpoint_type(&ep->desc)) { case USB_ENDPOINT_XFER_CONTROL: case USB_ENDPOINT_XFER_ISOC: return -EINVAL; @@ -977,7 +987,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, uurb->number_of_packets = 0; if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) return -EINVAL; - if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) + if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, + uurb->buffer, uurb->buffer_length)) return -EFAULT; snoop(&ps->dev->dev, "bulk urb\n"); break; @@ -986,8 +997,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, /* arbitrary limit */ if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) return -EINVAL; - if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) - != USB_ENDPOINT_XFER_ISOC) + if (!usb_endpoint_xfer_isoc(&ep->desc)) return -EINVAL; isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) @@ -1014,12 +1024,12 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, case USBDEVFS_URB_TYPE_INTERRUPT: uurb->number_of_packets = 0; - if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) - != USB_ENDPOINT_XFER_INT) + if (!usb_endpoint_xfer_int(&ep->desc)) return -EINVAL; if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) return -EINVAL; - if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) + if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, + uurb->buffer, uurb->buffer_length)) return -EFAULT; snoop(&ps->dev->dev, "interrupt urb\n"); break; @@ -1039,8 +1049,11 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, return -ENOMEM; } as->urb->dev = ps->dev; - as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); - as->urb->transfer_flags = uurb->flags; + as->urb->pipe = (uurb->type << 30) | + __create_pipe(ps->dev, uurb->endpoint & 0xf) | + (uurb->endpoint & USB_DIR_IN); + as->urb->transfer_flags = uurb->flags | + (is_in ? URB_DIR_IN : URB_DIR_OUT); as->urb->transfer_buffer_length = uurb->buffer_length; as->urb->setup_packet = (unsigned char*)dr; as->urb->start_frame = uurb->start_frame; @@ -1070,13 +1083,13 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, as->uid = current->uid; as->euid = current->euid; security_task_getsecid(current, &as->secid); - if (!(uurb->endpoint & USB_DIR_IN)) { - if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { + if (!is_in) { + if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, + as->urb->transfer_buffer_length)) { free_async(as); return -EFAULT; } } - snoop(&as->urb->dev->dev, "submit urb\n"); snoop_urb(as->urb, as->userurb); async_newpending(as); if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { @@ -1126,7 +1139,7 @@ static int processcompl(struct async *as, void __user * __user *arg) if (put_user(urb->error_count, &userurb->error_count)) return -EFAULT; - if (usb_pipeisoc(urb->pipe)) { + if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { for (i = 0; i < urb->number_of_packets; i++) { if (put_user(urb->iso_frame_desc[i].actual_length, &userurb->iso_frame_desc[i].actual_length)) @@ -1240,7 +1253,7 @@ static int processcompl_compat(struct async *as, void __user * __user *arg) if (put_user(urb->error_count, &userurb->error_count)) return -EFAULT; - if (usb_pipeisoc(urb->pipe)) { + if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { for (i = 0; i < urb->number_of_packets; i++) { if (put_user(urb->iso_frame_desc[i].actual_length, &userurb->iso_frame_desc[i].actual_length)) -- 2.39.5