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