LXR qemu/tests/megasas-test.c

   1/*
   2 * QTest testcase for LSI MegaRAID
   3 *
   4 * Copyright (c) 2017 Red Hat Inc.
   5 *
   6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7 * See the COPYING file in the top-level directory.
   8 */
   9
  10#include "qemu/osdep.h"
  11#include "libqtest.h"
  12#include "qemu/bswap.h"
  13#include "qemu/module.h"
  14#include "libqos/qgraph.h"
  15#include "libqos/pci.h"
  16
  17typedef struct QMegasas QMegasas;
  18
  19struct QMegasas {
  20    QOSGraphObject obj;
  21    QPCIDevice dev;
  22};
  23
  24static void *megasas_get_driver(void *obj, const char *interface)
  25{
  26    QMegasas *megasas = obj;
  27
  28    if (!g_strcmp0(interface, "pci-device")) {
  29        return &megasas->dev;
  30    }
  31
  32    fprintf(stderr, "%s not present in megasas\n", interface);
  33    g_assert_not_reached();
  34}
  35
  36static void *megasas_create(void *pci_bus, QGuestAllocator *alloc, void *addr)
  37{
  38    QMegasas *megasas = g_new0(QMegasas, 1);
  39    QPCIBus *bus = pci_bus;
  40
  41    qpci_device_init(&megasas->dev, bus, addr);
  42    megasas->obj.get_driver = megasas_get_driver;
  43
  44    return &megasas->obj;
  45}
  46
  47/* This used to cause a NULL pointer dereference.  */
  48static void megasas_pd_get_info_fuzz(void *obj, void *data, QGuestAllocator *alloc)
  49{
  50    QMegasas *megasas = obj;
  51    QPCIDevice *dev = &megasas->dev;
  52    QPCIBar bar;
  53    uint32_t context[256];
  54    uint64_t context_pa;
  55    int i;
  56
  57    qpci_device_enable(dev);
  58    bar = qpci_iomap(dev, 0, NULL);
  59
  60    memset(context, 0, sizeof(context));
  61    context[0] = cpu_to_le32(0x05050505);
  62    context[1] = cpu_to_le32(0x01010101);
  63    for (i = 2; i < ARRAY_SIZE(context); i++) {
  64        context[i] = cpu_to_le32(0x41414141);
  65    }
  66    context[6] = cpu_to_le32(0x02020000);
  67    context[7] = cpu_to_le32(0);
  68
  69    context_pa = guest_alloc(alloc, sizeof(context));
  70    qtest_memwrite(dev->bus->qts, context_pa, context, sizeof(context));
  71    qpci_io_writel(dev, bar, 0x40, context_pa);
  72}
  73
  74static void megasas_register_nodes(void)
  75{
  76    QOSGraphEdgeOptions opts = {
  77        .extra_device_opts = "addr=04.0,id=scsi0",
  78        .before_cmd_line = "-drive id=drv0,if=none,file=null-co://,format=raw",
  79        .after_cmd_line = "-device scsi-hd,bus=scsi0.0,drive=drv0",
  80    };
  81
  82    add_qpci_address(&opts, &(QPCIAddress) { .devfn = QPCI_DEVFN(4, 0) });
  83
  84    qos_node_create_driver("megasas", megasas_create);
  85    qos_node_consumes("megasas", "pci-bus", &opts);
  86    qos_node_produces("megasas", "pci-device");
  87
  88    qos_add_test("dcmd/pd-get-info/fuzz", "megasas", megasas_pd_get_info_fuzz, NULL);
  89}
  90libqos_init(megasas_register_nodes);
  91