4e3a43905e
We do not include sys/rman.h and so machine/resource.h ends up not being included by the time pci_private.h is included. This means PCI_RES_BUS is never defined, and so the sc_bus member of pci_softc is not present when compiling ofw_pci, resulting in the wrong softc size being passed to DEFINE_CLASS_1 and thus any attempts by pci(4) to access that member are out-of-bounds reads or writes. This is pretty fragile; arguably pci_private.h should be including sys/rman.h, but this is the minimal needed change to fix the bug whilst maintaining the status quo. Found by: CHERI Reported by: andrew
95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2021 Alstom Group.
|
|
* Copyright (c) 2021 Semihalf.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/rman.h>
|
|
|
|
#include <dev/pci/pcireg.h>
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/pci/pci_private.h>
|
|
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include "pcib_if.h"
|
|
#include "pci_if.h"
|
|
|
|
static int ofw_pci_probe(device_t);
|
|
static const struct ofw_bus_devinfo* pci_ofw_get_devinfo(device_t, device_t);
|
|
|
|
static device_method_t ofw_pci_methods[] = {
|
|
DEVMETHOD(device_probe, ofw_pci_probe),
|
|
|
|
/* ofw_bus interface */
|
|
DEVMETHOD(ofw_bus_get_devinfo, pci_ofw_get_devinfo),
|
|
DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
|
|
DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
|
|
DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
|
|
DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
|
|
DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static devclass_t pci_devclass;
|
|
|
|
DEFINE_CLASS_1(pci, ofw_pci_driver, ofw_pci_methods, sizeof(struct pci_softc),
|
|
pci_driver);
|
|
DRIVER_MODULE(ofw_pci, pcib, ofw_pci_driver, pci_devclass, 0, 0);
|
|
MODULE_DEPEND(ofw_pci, simplebus, 1, 1, 1);
|
|
MODULE_DEPEND(ofw_pci, pci, 1, 1, 1);
|
|
MODULE_VERSION(ofw_pci, 1);
|
|
|
|
static int
|
|
ofw_pci_probe(device_t dev)
|
|
{
|
|
device_t parent;
|
|
|
|
parent = device_get_parent(dev);
|
|
if (ofw_bus_get_node(parent) == -1)
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, "OFW PCI bus");
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
/* Pass the request up to our parent. */
|
|
static const struct ofw_bus_devinfo*
|
|
pci_ofw_get_devinfo(device_t bus, device_t dev)
|
|
{
|
|
|
|
return OFW_BUS_GET_DEVINFO(device_get_parent(bus), dev);
|
|
}
|