tests/qtest/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
  17 typedef struct QMegasas QMegasas;
  18
  19 struct QMegasas {
  20     QOSGraphObject obj;
  21     QPCIDevice dev;
  22 };
  23
  24 static 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
  36 static 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.  */
  48 static 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
  74 static 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://,"
  79                            "file.read-zeroes=on,format=raw",
  80         .after_cmd_line = "-device scsi-hd,bus=scsi0.0,drive=drv0",
  81     };
  82
  83     add_qpci_address(&opts, &(QPCIAddress) { .devfn = QPCI_DEVFN(4, 0) });
  84
  85     qos_node_create_driver("megasas", megasas_create);
  86     qos_node_consumes("megasas", "pci-bus", &opts);
  87     qos_node_produces("megasas", "pci-device");
  88
  89     qos_add_test("dcmd/pd-get-info/fuzz", "megasas", megasas_pd_get_info_fuzz, NULL);
  90 }
  91 libqos_init(megasas_register_nodes);