Coverage Report

Created: 2022-04-27 14:33

/libfido2/fuzz/udev.c
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Source (jump to first uncovered line)
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/*
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 * Copyright (c) 2021 Yubico AB. All rights reserved.
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 * Use of this source code is governed by a BSD-style
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 * license that can be found in the LICENSE file.
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 */
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#include <sys/types.h>
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#include <linux/hidraw.h>
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#include <linux/input.h>
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#include <assert.h>
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#include <errno.h>
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#include <libudev.h>
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#include <stdlib.h>
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#include "mutator_aux.h"
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struct udev {
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        int magic;
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};
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struct udev_enumerate {
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        int magic;
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        struct udev_list_entry *list_entry;
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};
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struct udev_list_entry {
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        int magic;
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};
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struct udev_device {
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        int magic;
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        struct udev_device *parent;
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};
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558k
#define UDEV_MAGIC              0x584492cc
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2.23M
#define UDEV_DEVICE_MAGIC       0x569180dd
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2.37k
#define UDEV_LIST_ENTRY_MAGIC   0x497422ee
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2.39k
#define UDEV_ENUM_MAGIC         0x583570ff
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12.1M
#define ASSERT_TYPE(x, m)               assert((x) != NULL && (x)->magic == (m))
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2.17M
#define ASSERT_UDEV(x)                  ASSERT_TYPE((x), UDEV_MAGIC)
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9.55k
#define ASSERT_UDEV_ENUM(x)             ASSERT_TYPE((x), UDEV_ENUM_MAGIC)
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2.12M
#define ASSERT_UDEV_LIST_ENTRY(x)       ASSERT_TYPE((x), UDEV_LIST_ENTRY_MAGIC)
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7.88M
#define ASSERT_UDEV_DEVICE(x)           ASSERT_TYPE((x), UDEV_DEVICE_MAGIC)
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static const char *uevent;
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static const struct blob *report_descriptor;
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struct udev *__wrap_udev_new(void);
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struct udev_device *__wrap_udev_device_get_parent_with_subsystem_devtype(
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    struct udev_device *, const char *, const char *);
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struct udev_device *__wrap_udev_device_new_from_syspath(struct udev *,
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    const char *);
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struct udev_enumerate *__wrap_udev_enumerate_new(struct udev *);
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struct udev_list_entry *__wrap_udev_enumerate_get_list_entry(
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    struct udev_enumerate *);
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struct udev_list_entry *__wrap_udev_list_entry_get_next(
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    struct udev_list_entry *);
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const char *__wrap_udev_device_get_sysattr_value(struct udev_device *,
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    const char *);
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const char *__wrap_udev_list_entry_get_name(struct udev_list_entry *);
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const char *__wrap_udev_device_get_devnode(struct udev_device *);
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const char *__wrap_udev_device_get_sysnum(struct udev_device *);
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int __wrap_udev_enumerate_add_match_subsystem(struct udev_enumerate *,
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    const char *);
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int __wrap_udev_enumerate_scan_devices(struct udev_enumerate *);
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int __wrap_ioctl(int, unsigned long , ...);
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void __wrap_udev_device_unref(struct udev_device *);
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void __wrap_udev_enumerate_unref(struct udev_enumerate *);
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void __wrap_udev_unref(struct udev *);
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void set_udev_parameters(const char *, const struct blob *);
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struct udev_device *
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__wrap_udev_device_get_parent_with_subsystem_devtype(struct udev_device *child,
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    const char *subsystem, const char *devtype)
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2.30M
{
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2.30M
        ASSERT_UDEV_DEVICE(child);
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0
        fido_log_debug("%s", subsystem); /* XXX consume */
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2.30M
        fido_log_debug("%s", devtype); /* XXX consume */
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2.30M
        if (child->parent != NULL)
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1.67M
                return child->parent;
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626k
        if ((child->parent = calloc(1, sizeof(*child->parent))) == NULL)
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1.63k
                return NULL;
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624k
        child->parent->magic = UDEV_DEVICE_MAGIC;
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624k
        return child->parent;
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626k
}
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const char *
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__wrap_udev_device_get_sysattr_value(struct udev_device *udev_device,
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    const char *sysattr)
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2.29M
{
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2.29M
        ASSERT_UDEV_DEVICE(udev_device);
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2.29M
        if (uniform_random(400) < 1)
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5.66k
                return NULL;
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2.29M
        if (!strcmp(sysattr, "manufacturer") || !strcmp(sysattr, "product"))
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1.11M
                return "product info"; /* XXX randomise? */
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1.17M
        else if (!strcmp(sysattr, "uevent"))
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66.6k
                return uevent;
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1.11M
        return NULL;
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2.29M
}
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const char *
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__wrap_udev_list_entry_get_name(struct udev_list_entry *entry)
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1.06M
{
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1.06M
        ASSERT_UDEV_LIST_ENTRY(entry);
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1.06M
        return uniform_random(400) < 1 ? NULL : "name"; /* XXX randomise? */
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1.06M
}
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struct udev_device *
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__wrap_udev_device_new_from_syspath(struct udev *udev, const char *syspath)
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1.61M
{
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1.61M
        struct udev_device *udev_device;
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1.61M
        ASSERT_UDEV(udev);
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0
        fido_log_debug("%s", syspath);
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1.61M
        if ((udev_device = calloc(1, sizeof(*udev_device))) == NULL)
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4.04k
                return NULL;
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1.61M
        udev_device->magic = UDEV_DEVICE_MAGIC;
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1.61M
        return udev_device;
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1.61M
}
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const char *
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__wrap_udev_device_get_devnode(struct udev_device *udev_device)
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497k
{
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497k
        ASSERT_UDEV_DEVICE(udev_device);
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497k
        return uniform_random(400) < 1 ? NULL : "/dev/zero";
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497k
}
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const char *
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__wrap_udev_device_get_sysnum(struct udev_device *udev_device)
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554k
{
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554k
        ASSERT_UDEV_DEVICE(udev_device);
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554k
        return uniform_random(400) < 1 ? NULL : "101010"; /* XXX randomise? */
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554k
}
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void
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__wrap_udev_device_unref(struct udev_device *udev_device)
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1.61M
{
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1.61M
        ASSERT_UDEV_DEVICE(udev_device);
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1.61M
        if (udev_device->parent) {
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624k
                ASSERT_UDEV_DEVICE(udev_device->parent);
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0
                free(udev_device->parent);
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624k
        }
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0
        free(udev_device);
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1.61M
}
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struct udev *
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__wrap_udev_new(void)
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559k
{
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559k
        struct udev *udev;
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559k
        if ((udev = calloc(1, sizeof(*udev))) == NULL)
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1.51k
                return NULL;
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558k
        udev->magic = UDEV_MAGIC;
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161
558k
        return udev;
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559k
}
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struct udev_enumerate *
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__wrap_udev_enumerate_new(struct udev *udev)
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2.40k
{
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2.40k
        struct udev_enumerate *udev_enum;
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2.40k
        ASSERT_UDEV(udev);
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2.40k
        if ((udev_enum = calloc(1, sizeof(*udev_enum))) == NULL)
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9
                return NULL;
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2.39k
        udev_enum->magic = UDEV_ENUM_MAGIC;
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2.39k
        return udev_enum;
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2.40k
}
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177
int
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__wrap_udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enum,
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    const char *subsystem)
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2.39k
{
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2.39k
        ASSERT_UDEV_ENUM(udev_enum);
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0
        fido_log_debug("%s:", subsystem);
183
2.39k
        return uniform_random(400) < 1 ? -EINVAL : 0;
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2.39k
}
185
186
int
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__wrap_udev_enumerate_scan_devices(struct udev_enumerate *udev_enum)
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2.38k
{
189
2.38k
        ASSERT_UDEV_ENUM(udev_enum);
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2.38k
        return uniform_random(400) < 1 ? -EINVAL : 0;
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2.38k
}
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struct udev_list_entry *
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__wrap_udev_enumerate_get_list_entry(struct udev_enumerate *udev_enum)
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2.38k
{
196
2.38k
        ASSERT_UDEV_ENUM(udev_enum);
197
2.38k
        if ((udev_enum->list_entry = calloc(1,
198
2.38k
            sizeof(*udev_enum->list_entry))) == NULL)
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10
                return NULL;
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2.37k
        udev_enum->list_entry->magic = UDEV_LIST_ENTRY_MAGIC;
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202
2.37k
        return udev_enum->list_entry;
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2.38k
}
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struct udev_list_entry *
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__wrap_udev_list_entry_get_next(struct udev_list_entry *udev_list_entry)
207
1.06M
{
208
1.06M
        ASSERT_UDEV_LIST_ENTRY(udev_list_entry);
209
1.06M
        return uniform_random(400) < 1 ? NULL : udev_list_entry;
210
1.06M
}
211
212
void
213
__wrap_udev_enumerate_unref(struct udev_enumerate *udev_enum)
214
2.39k
{
215
2.39k
        ASSERT_UDEV_ENUM(udev_enum);
216
2.39k
        if (udev_enum->list_entry)
217
2.39k
                ASSERT_UDEV_LIST_ENTRY(udev_enum->list_entry);
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0
        free(udev_enum->list_entry);
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2.39k
        free(udev_enum);
220
2.39k
}
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222
void
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__wrap_udev_unref(struct udev *udev)
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558k
{
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558k
        ASSERT_UDEV(udev);
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0
        free(udev);
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558k
}
228
229
int
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__wrap_ioctl(int fd, unsigned long request, ...)
231
991k
{
232
991k
        va_list ap;
233
991k
        struct hidraw_report_descriptor *hrd;
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235
991k
        (void)fd;
236
237
991k
        if (uniform_random(400) < 1) {
238
2.57k
                errno = EINVAL;
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2.57k
                return -1;
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2.57k
        }
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989k
        va_start(ap, request);
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244
989k
        switch (request) {
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495k
        case IOCTL_REQ(HIDIOCGRDESCSIZE):
246
495k
                *va_arg(ap, int *) = (int)report_descriptor->len;
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495k
                break;
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494k
        case IOCTL_REQ(HIDIOCGRDESC):
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494k
                hrd = va_arg(ap, struct hidraw_report_descriptor *);
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494k
                assert(hrd->size == report_descriptor->len);
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0
                memcpy(hrd->value, report_descriptor->body, hrd->size);
252
494k
                break;
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0
        default:
254
0
                warnx("%s: unknown request 0x%lx", __func__, request);
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0
                abort();
256
989k
        }
257
258
989k
        va_end(ap);
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260
989k
        return 0;
261
989k
}
262
263
void
264
set_udev_parameters(const char *uevent_ptr,
265
    const struct blob *report_descriptor_ptr)
266
1.23k
{
267
1.23k
        uevent = uevent_ptr;
268
1.23k
        report_descriptor = report_descriptor_ptr;
269
1.23k
}