Coverage Report

Created: 2024-06-03 09:43

/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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 * SPDX-License-Identifier: BSD-2-Clause
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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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38
733k
#define UDEV_MAGIC              0x584492cc
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2.23M
#define UDEV_DEVICE_MAGIC       0x569180dd
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3.23k
#define UDEV_LIST_ENTRY_MAGIC   0x497422ee
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3.25k
#define UDEV_ENUM_MAGIC         0x583570ff
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9.57M
#define ASSERT_TYPE(x, m)               assert((x) != NULL && (x)->magic == (m))
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2.87M
#define ASSERT_UDEV(x)                  ASSERT_TYPE((x), UDEV_MAGIC)
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12.9k
#define ASSERT_UDEV_ENUM(x)             ASSERT_TYPE((x), UDEV_ENUM_MAGIC)
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2.82M
#define ASSERT_UDEV_LIST_ENTRY(x)       ASSERT_TYPE((x), UDEV_LIST_ENTRY_MAGIC)
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3.86M
#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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114k
{
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114k
        ASSERT_UDEV_DEVICE(child);
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0
        fido_log_debug("%s", subsystem); /* XXX consume */
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114k
        fido_log_debug("%s", devtype); /* XXX consume */
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114k
        if (child->parent != NULL)
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5.64k
                return child->parent;
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108k
        if ((child->parent = calloc(1, sizeof(*child->parent))) == NULL)
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263
                return NULL;
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108k
        child->parent->magic = UDEV_DEVICE_MAGIC;
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108k
        return child->parent;
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108k
}
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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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113k
{
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113k
        ASSERT_UDEV_DEVICE(udev_device);
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113k
        if (uniform_random(400) < 1)
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322
                return NULL;
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113k
        if (!strcmp(sysattr, "manufacturer") || !strcmp(sysattr, "product"))
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5.59k
                return "product info"; /* XXX randomise? */
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107k
        else if (!strcmp(sysattr, "uevent"))
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107k
                return uevent;
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0
        return NULL;
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113k
}
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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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1.41M
{
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1.41M
        ASSERT_UDEV_LIST_ENTRY(entry);
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1.41M
        return uniform_random(400) < 1 ? NULL : "name"; /* XXX randomise? */
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1.41M
}
113
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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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2.13M
{
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2.13M
        struct udev_device *udev_device;
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2.13M
        ASSERT_UDEV(udev);
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0
        fido_log_debug("%s", syspath);
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2.13M
        if ((udev_device = calloc(1, sizeof(*udev_device))) == NULL)
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5.35k
                return NULL;
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2.13M
        udev_device->magic = UDEV_DEVICE_MAGIC;
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2.13M
        return udev_device;
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2.13M
}
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const char *
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__wrap_udev_device_get_devnode(struct udev_device *udev_device)
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666k
{
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666k
        ASSERT_UDEV_DEVICE(udev_device);
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666k
        return uniform_random(400) < 1 ? NULL : "/dev/zero";
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666k
}
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const char *
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__wrap_udev_device_get_sysnum(struct udev_device *udev_device)
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727k
{
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727k
        ASSERT_UDEV_DEVICE(udev_device);
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727k
        return uniform_random(400) < 1 ? NULL : "101010"; /* XXX randomise? */
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727k
}
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142
void
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__wrap_udev_device_unref(struct udev_device *udev_device)
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2.13M
{
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2.13M
        ASSERT_UDEV_DEVICE(udev_device);
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2.13M
        if (udev_device->parent) {
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108k
                ASSERT_UDEV_DEVICE(udev_device->parent);
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0
                free(udev_device->parent);
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108k
        }
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0
        free(udev_device);
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2.13M
}
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struct udev *
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__wrap_udev_new(void)
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734k
{
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734k
        struct udev *udev;
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734k
        if ((udev = calloc(1, sizeof(*udev))) == NULL)
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1.87k
                return NULL;
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733k
        udev->magic = UDEV_MAGIC;
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162
733k
        return udev;
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734k
}
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struct udev_enumerate *
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__wrap_udev_enumerate_new(struct udev *udev)
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3.26k
{
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3.26k
        struct udev_enumerate *udev_enum;
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3.26k
        ASSERT_UDEV(udev);
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3.26k
        if ((udev_enum = calloc(1, sizeof(*udev_enum))) == NULL)
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11
                return NULL;
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3.25k
        udev_enum->magic = UDEV_ENUM_MAGIC;
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175
3.25k
        return udev_enum;
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3.26k
}
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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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3.25k
{
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3.25k
        ASSERT_UDEV_ENUM(udev_enum);
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0
        fido_log_debug("%s:", subsystem);
184
3.25k
        return uniform_random(400) < 1 ? -EINVAL : 0;
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3.25k
}
186
187
int
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__wrap_udev_enumerate_scan_devices(struct udev_enumerate *udev_enum)
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3.24k
{
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3.24k
        ASSERT_UDEV_ENUM(udev_enum);
191
3.24k
        return uniform_random(400) < 1 ? -EINVAL : 0;
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3.24k
}
193
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struct udev_list_entry *
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__wrap_udev_enumerate_get_list_entry(struct udev_enumerate *udev_enum)
196
3.23k
{
197
3.23k
        ASSERT_UDEV_ENUM(udev_enum);
198
3.23k
        if ((udev_enum->list_entry = calloc(1,
199
3.23k
            sizeof(*udev_enum->list_entry))) == NULL)
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4
                return NULL;
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3.23k
        udev_enum->list_entry->magic = UDEV_LIST_ENTRY_MAGIC;
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203
3.23k
        return udev_enum->list_entry;
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3.23k
}
205
206
struct udev_list_entry *
207
__wrap_udev_list_entry_get_next(struct udev_list_entry *udev_list_entry)
208
1.41M
{
209
1.41M
        ASSERT_UDEV_LIST_ENTRY(udev_list_entry);
210
1.41M
        return uniform_random(400) < 1 ? NULL : udev_list_entry;
211
1.41M
}
212
213
void
214
__wrap_udev_enumerate_unref(struct udev_enumerate *udev_enum)
215
3.25k
{
216
3.25k
        ASSERT_UDEV_ENUM(udev_enum);
217
3.25k
        if (udev_enum->list_entry)
218
3.25k
                ASSERT_UDEV_LIST_ENTRY(udev_enum->list_entry);
219
0
        free(udev_enum->list_entry);
220
3.25k
        free(udev_enum);
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3.25k
}
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223
void
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__wrap_udev_unref(struct udev *udev)
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733k
{
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733k
        ASSERT_UDEV(udev);
227
0
        free(udev);
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733k
}
229
230
int
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__wrap_ioctl(int fd, unsigned long request, ...)
232
1.32M
{
233
1.32M
        va_list ap;
234
1.32M
        struct hidraw_report_descriptor *hrd;
235
236
1.32M
        (void)fd;
237
238
1.32M
        if (uniform_random(400) < 1) {
239
3.28k
                errno = EINVAL;
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3.28k
                return -1;
241
3.28k
        }
242
243
1.32M
        va_start(ap, request);
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245
1.32M
        switch (IOCTL_REQ(request)) {
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661k
        case IOCTL_REQ(HIDIOCGRDESCSIZE):
247
661k
                *va_arg(ap, int *) = (int)report_descriptor->len;
248
661k
                break;
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659k
        case IOCTL_REQ(HIDIOCGRDESC):
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659k
                hrd = va_arg(ap, struct hidraw_report_descriptor *);
251
659k
                assert(hrd->size == report_descriptor->len);
252
0
                memcpy(hrd->value, report_descriptor->body, hrd->size);
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659k
                break;
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0
        default:
255
0
                warnx("%s: unknown request 0x%lx", __func__, request);
256
0
                abort();
257
1.32M
        }
258
259
1.32M
        va_end(ap);
260
261
1.32M
        return 0;
262
1.32M
}
263
264
void
265
set_udev_parameters(const char *uevent_ptr,
266
    const struct blob *report_descriptor_ptr)
267
1.67k
{
268
1.67k
        uevent = uevent_ptr;
269
1.67k
        report_descriptor = report_descriptor_ptr;
270
1.67k
}