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ca1ef1e62e
This patch is to reduce the number of Valgrind report messages about
using uninitialized memory with the null-co driver. It helps to filter
real memory issues and is the same work done for the iotests with the
commit ID a6862418fe.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Message-Id: <1564404360-733987-1-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*
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* QTest testcase for LSI MegaRAID
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*
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* Copyright (c) 2017 Red Hat Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "libqtest.h"
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#include "qemu/bswap.h"
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#include "qemu/module.h"
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#include "libqos/qgraph.h"
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#include "libqos/pci.h"
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typedef struct QMegasas QMegasas;
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struct QMegasas {
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QOSGraphObject obj;
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QPCIDevice dev;
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};
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static void *megasas_get_driver(void *obj, const char *interface)
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{
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QMegasas *megasas = obj;
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if (!g_strcmp0(interface, "pci-device")) {
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return &megasas->dev;
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}
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fprintf(stderr, "%s not present in megasas\n", interface);
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g_assert_not_reached();
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}
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static void *megasas_create(void *pci_bus, QGuestAllocator *alloc, void *addr)
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{
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QMegasas *megasas = g_new0(QMegasas, 1);
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QPCIBus *bus = pci_bus;
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qpci_device_init(&megasas->dev, bus, addr);
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megasas->obj.get_driver = megasas_get_driver;
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return &megasas->obj;
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}
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/* This used to cause a NULL pointer dereference. */
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static void megasas_pd_get_info_fuzz(void *obj, void *data, QGuestAllocator *alloc)
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{
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QMegasas *megasas = obj;
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QPCIDevice *dev = &megasas->dev;
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QPCIBar bar;
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uint32_t context[256];
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uint64_t context_pa;
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int i;
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qpci_device_enable(dev);
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bar = qpci_iomap(dev, 0, NULL);
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memset(context, 0, sizeof(context));
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context[0] = cpu_to_le32(0x05050505);
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context[1] = cpu_to_le32(0x01010101);
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for (i = 2; i < ARRAY_SIZE(context); i++) {
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context[i] = cpu_to_le32(0x41414141);
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}
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context[6] = cpu_to_le32(0x02020000);
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context[7] = cpu_to_le32(0);
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context_pa = guest_alloc(alloc, sizeof(context));
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qtest_memwrite(dev->bus->qts, context_pa, context, sizeof(context));
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qpci_io_writel(dev, bar, 0x40, context_pa);
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}
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static void megasas_register_nodes(void)
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{
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QOSGraphEdgeOptions opts = {
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.extra_device_opts = "addr=04.0,id=scsi0",
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.before_cmd_line = "-drive id=drv0,if=none,file=null-co://,"
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"file.read-zeroes=on,format=raw",
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.after_cmd_line = "-device scsi-hd,bus=scsi0.0,drive=drv0",
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};
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add_qpci_address(&opts, &(QPCIAddress) { .devfn = QPCI_DEVFN(4, 0) });
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qos_node_create_driver("megasas", megasas_create);
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qos_node_consumes("megasas", "pci-bus", &opts);
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qos_node_produces("megasas", "pci-device");
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qos_add_test("dcmd/pd-get-info/fuzz", "megasas", megasas_pd_get_info_fuzz, NULL);
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}
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libqos_init(megasas_register_nodes);
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