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[PATCH] usb: Patch for USBDEVFS_IOCTL from 32-bit programs 

Dell supplied me with the following test:

#include<stdio.h>
#include<errno.h>
#include<sys/ioctl.h>
#include<fcntl.h>
#include<linux/usbdevice_fs.h>

main(int argc,char*argv[])
{
   struct usbdevfs_hub_portinfo hubPortInfo = {0};
   struct usbdevfs_ioctl command = {0};
   command.ifno = 0;
   command.ioctl_code = USBDEVFS_HUB_PORTINFO;
   command.data = (void*)&hubPortInfo;
   int fd, ret;
   if(argc != 2) {
     fprintf(stderr,"Usage: %s /proc/bus/usb/<BusNo>/<HubID>\n",argv[0]);
     fprintf(stderr,"Example: %s /proc/bus/usb/001/001\n",argv[0]);
     exit(1);
   }
   errno = 0;
   fd = open(argv[1],O_RDWR);
   if(fd < 0) {
     perror("open failed:");
     exit(errno);
   }
   errno = 0;
   ret = ioctl(fd,USBDEVFS_IOCTL,&command);
   printf("IOCTL return status:%d\n",ret);
   if(ret<0) {
     perror("IOCTL failed:");
     close(fd);
     exit(3);
   } else {
       printf("IOCTL passed:Num of ports %d\n",hubPortInfo.nports);
       close(fd);
       exit(0);
   }
   return 0;
}

I have verified that it breaks if built in 32 bit mode on x86_64 and that
the patch below fixes it.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pete Zaitcev 2005-10-17 18:15:54 -07:00 committed by Greg Kroah-Hartman
parent 72adaa9627
commit c36fc889b5
3 changed files with 50 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/usb/core/devio.c
View File

@ -1301,23 +1301,20 @@ static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
return 0;
}
static int proc_ioctl (struct dev_state *ps, void __user *arg)
static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
{
struct usbdevfs_ioctl ctrl;
int size;
void *buf = NULL;
int retval = 0;
struct usb_interface *intf = NULL;
struct usb_driver *driver = NULL;
/* get input parameters and alloc buffer */
if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
return -EFAULT;
if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
/* alloc buffer */
if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
return -ENOMEM;
if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
if (copy_from_user (buf, ctrl.data, size)) {
if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
if (copy_from_user (buf, ctl->data, size)) {
kfree(buf);
return -EFAULT;
}
@ -1333,9 +1330,9 @@ static int proc_ioctl (struct dev_state *ps, void __user *arg)
if (ps->dev->state != USB_STATE_CONFIGURED)
retval = -EHOSTUNREACH;
else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
retval = -EINVAL;
else switch (ctrl.ioctl_code) {
else switch (ctl->ioctl_code) {
/* disconnect kernel driver from interface */
case USBDEVFS_DISCONNECT:
@ -1367,7 +1364,7 @@ static int proc_ioctl (struct dev_state *ps, void __user *arg)
if (driver == NULL || driver->ioctl == NULL) {
retval = -ENOTTY;
} else {
retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
retval = driver->ioctl (intf, ctl->ioctl_code, buf);
if (retval == -ENOIOCTLCMD)
retval = -ENOTTY;
}
@ -1376,15 +1373,42 @@ static int proc_ioctl (struct dev_state *ps, void __user *arg)
/* cleanup and return */
if (retval >= 0
&& (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
&& (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
&& size > 0
&& copy_to_user (ctrl.data, buf, size) != 0)
&& copy_to_user (ctl->data, buf, size) != 0)
retval = -EFAULT;
kfree(buf);
return retval;
}
static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
{
struct usbdevfs_ioctl ctrl;
if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
return -EFAULT;
return proc_ioctl(ps, &ctrl);
}
#ifdef CONFIG_COMPAT
static int proc_ioctl_compat(struct dev_state *ps, void __user *arg)
{
struct usbdevfs_ioctl32 __user *uioc;
struct usbdevfs_ioctl ctrl;
u32 udata;
uioc = compat_ptr(arg);
if (get_user(ctrl.ifno, &uioc->ifno) ||
get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
__get_user(udata, &uioc->data))
return -EFAULT;
ctrl.data = compat_ptr(udata);
return proc_ioctl(ps, &ctrl);
}
#endif
/*
* NOTE: All requests here that have interface numbers as parameters
* are assuming that somehow the configuration has been prevented from
@ -1485,6 +1509,10 @@ static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd
ret = proc_reapurbnonblock_compat(ps, p);
break;
case USBDEVFS_IOCTL32:
snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
ret = proc_ioctl_compat(ps, p);
break;
#endif
case USBDEVFS_DISCARDURB:
@ -1519,7 +1547,7 @@ static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd
case USBDEVFS_IOCTL:
snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
ret = proc_ioctl(ps, p);
ret = proc_ioctl_default(ps, p);
break;
}
usb_unlock_device(dev);

1
fs/compat_ioctl.c
View File

@ -3050,6 +3050,7 @@ HANDLE_IOCTL(TIOCSSERIAL, serial_struct_ioctl)
HANDLE_IOCTL(USBDEVFS_CONTROL32, do_usbdevfs_control)
HANDLE_IOCTL(USBDEVFS_BULK32, do_usbdevfs_bulk)
HANDLE_IOCTL(USBDEVFS_DISCSIGNAL32, do_usbdevfs_discsignal)
COMPATIBLE_IOCTL(USBDEVFS_IOCTL32)
/* i2c */
HANDLE_IOCTL(I2C_FUNCS, w_long)
HANDLE_IOCTL(I2C_RDWR, do_i2c_rdwr_ioctl)

7
include/linux/usbdevice_fs.h
View File

@ -140,6 +140,12 @@ struct usbdevfs_urb32 {
compat_caddr_t usercontext; /* unused */
struct usbdevfs_iso_packet_desc iso_frame_desc[0];
};
struct usbdevfs_ioctl32 {
s32 ifno;
s32 ioctl_code;
compat_caddr_t data;
};
#endif
#define USBDEVFS_CONTROL _IOWR('U', 0, struct usbdevfs_ctrltransfer)
@ -160,6 +166,7 @@ struct usbdevfs_urb32 {
#define USBDEVFS_RELEASEINTERFACE _IOR('U', 16, unsigned int)
#define USBDEVFS_CONNECTINFO _IOW('U', 17, struct usbdevfs_connectinfo)
#define USBDEVFS_IOCTL _IOWR('U', 18, struct usbdevfs_ioctl)
#define USBDEVFS_IOCTL32 _IOWR('U', 18, struct usbdevfs_ioctl32)
#define USBDEVFS_HUB_PORTINFO _IOR('U', 19, struct usbdevfs_hub_portinfo)
#define USBDEVFS_RESET _IO('U', 20)
#define USBDEVFS_CLEAR_HALT _IOR('U', 21, unsigned int)