mirror of
https://github.com/reactos/syzkaller.git
synced 2024-10-07 00:53:27 +00:00
d89275f2aa
Among other things this changes timeout for USB programs from 2 to 3 seconds. ath9k fuzzing also requires ath9k firmware to be present, so system images need to be regenerated with the updated script.
1301 lines
37 KiB
C
1301 lines
37 KiB
C
// Copyright 2019 syzkaller project authors. All rights reserved.
|
|
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
|
|
|
|
// This file is shared between executor and csource package.
|
|
|
|
// Implementation of syz_usb_* pseudo-syscalls.
|
|
|
|
#define USB_MAX_IFACE_NUM 4
|
|
#define USB_MAX_EP_NUM 32
|
|
|
|
struct usb_iface_index {
|
|
struct usb_interface_descriptor* iface;
|
|
uint8 bInterfaceNumber;
|
|
uint8 bAlternateSetting;
|
|
uint8 bInterfaceClass;
|
|
struct usb_endpoint_descriptor eps[USB_MAX_EP_NUM];
|
|
int eps_num;
|
|
};
|
|
|
|
struct usb_device_index {
|
|
struct usb_device_descriptor* dev;
|
|
struct usb_config_descriptor* config;
|
|
uint8 bDeviceClass;
|
|
uint8 bMaxPower;
|
|
int config_length;
|
|
struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
|
|
int ifaces_num;
|
|
int iface_cur;
|
|
};
|
|
|
|
static bool parse_usb_descriptor(const char* buffer, size_t length, struct usb_device_index* index)
|
|
{
|
|
if (length < sizeof(*index->dev) + sizeof(*index->config))
|
|
return false;
|
|
|
|
memset(index, 0, sizeof(*index));
|
|
|
|
index->dev = (struct usb_device_descriptor*)buffer;
|
|
index->config = (struct usb_config_descriptor*)(buffer + sizeof(*index->dev));
|
|
index->bDeviceClass = index->dev->bDeviceClass;
|
|
index->bMaxPower = index->config->bMaxPower;
|
|
index->config_length = length - sizeof(*index->dev);
|
|
index->iface_cur = -1;
|
|
size_t offset = 0;
|
|
|
|
while (true) {
|
|
if (offset + 1 >= length)
|
|
break;
|
|
uint8 desc_length = buffer[offset];
|
|
uint8 desc_type = buffer[offset + 1];
|
|
if (desc_length <= 2)
|
|
break;
|
|
if (offset + desc_length > length)
|
|
break;
|
|
if (desc_type == USB_DT_INTERFACE && index->ifaces_num < USB_MAX_IFACE_NUM) {
|
|
struct usb_interface_descriptor* iface = (struct usb_interface_descriptor*)(buffer + offset);
|
|
debug("parse_usb_descriptor: found interface #%u (%d, %d) at %p\n",
|
|
index->ifaces_num, iface->bInterfaceNumber, iface->bAlternateSetting, iface);
|
|
index->ifaces[index->ifaces_num].iface = iface;
|
|
index->ifaces[index->ifaces_num].bInterfaceNumber = iface->bInterfaceNumber;
|
|
index->ifaces[index->ifaces_num].bAlternateSetting = iface->bAlternateSetting;
|
|
index->ifaces[index->ifaces_num].bInterfaceClass = iface->bInterfaceClass;
|
|
index->ifaces_num++;
|
|
}
|
|
if (desc_type == USB_DT_ENDPOINT && index->ifaces_num > 0) {
|
|
struct usb_iface_index* iface = &index->ifaces[index->ifaces_num - 1];
|
|
debug("parse_usb_descriptor: found endpoint #%u at %p\n", iface->eps_num, buffer + offset);
|
|
if (iface->eps_num < USB_MAX_EP_NUM) {
|
|
memcpy(&iface->eps[iface->eps_num], buffer + offset, sizeof(iface->eps[iface->eps_num]));
|
|
iface->eps_num++;
|
|
}
|
|
}
|
|
offset += desc_length;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#define UDC_NAME_LENGTH_MAX 128
|
|
|
|
struct usb_raw_init {
|
|
__u8 driver_name[UDC_NAME_LENGTH_MAX];
|
|
__u8 device_name[UDC_NAME_LENGTH_MAX];
|
|
__u8 speed;
|
|
};
|
|
|
|
enum usb_raw_event_type {
|
|
USB_RAW_EVENT_INVALID = 0,
|
|
USB_RAW_EVENT_CONNECT = 1,
|
|
USB_RAW_EVENT_CONTROL = 2,
|
|
};
|
|
|
|
struct usb_raw_event {
|
|
__u32 type;
|
|
__u32 length;
|
|
__u8 data[0];
|
|
};
|
|
|
|
struct usb_raw_ep_io {
|
|
__u16 ep;
|
|
__u16 flags;
|
|
__u32 length;
|
|
__u8 data[0];
|
|
};
|
|
|
|
#define USB_RAW_IOCTL_INIT _IOW('U', 0, struct usb_raw_init)
|
|
#define USB_RAW_IOCTL_RUN _IO('U', 1)
|
|
#define USB_RAW_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_raw_event)
|
|
#define USB_RAW_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_raw_ep_io)
|
|
#define USB_RAW_IOCTL_EP0_READ _IOWR('U', 4, struct usb_raw_ep_io)
|
|
#define USB_RAW_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor)
|
|
#define USB_RAW_IOCTL_EP_DISABLE _IOW('U', 6, __u32)
|
|
#define USB_RAW_IOCTL_EP_WRITE _IOW('U', 7, struct usb_raw_ep_io)
|
|
#define USB_RAW_IOCTL_EP_READ _IOWR('U', 8, struct usb_raw_ep_io)
|
|
#define USB_RAW_IOCTL_CONFIGURE _IO('U', 9)
|
|
#define USB_RAW_IOCTL_VBUS_DRAW _IOW('U', 10, __u32)
|
|
|
|
static int usb_raw_open()
|
|
{
|
|
return open("/dev/raw-gadget", O_RDWR);
|
|
}
|
|
|
|
static int usb_raw_init(int fd, uint32 speed, const char* driver, const char* device)
|
|
{
|
|
struct usb_raw_init arg;
|
|
strncpy((char*)&arg.driver_name[0], driver, sizeof(arg.driver_name));
|
|
strncpy((char*)&arg.device_name[0], device, sizeof(arg.device_name));
|
|
arg.speed = speed;
|
|
return ioctl(fd, USB_RAW_IOCTL_INIT, &arg);
|
|
}
|
|
|
|
static int usb_raw_run(int fd)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_RUN, 0);
|
|
}
|
|
|
|
static int usb_raw_event_fetch(int fd, struct usb_raw_event* event)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_EVENT_FETCH, event);
|
|
}
|
|
|
|
static int usb_raw_ep0_write(int fd, struct usb_raw_ep_io* io)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_EP0_WRITE, io);
|
|
}
|
|
|
|
static int usb_raw_ep0_read(int fd, struct usb_raw_ep_io* io)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_EP0_READ, io);
|
|
}
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_ep_write
|
|
static int usb_raw_ep_write(int fd, struct usb_raw_ep_io* io)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_EP_WRITE, io);
|
|
}
|
|
#endif
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_ep_read
|
|
static int usb_raw_ep_read(int fd, struct usb_raw_ep_io* io)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_EP_READ, io);
|
|
}
|
|
#endif
|
|
|
|
static int usb_raw_ep_enable(int fd, struct usb_endpoint_descriptor* desc)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_EP_ENABLE, desc);
|
|
}
|
|
|
|
static int usb_raw_ep_disable(int fd, int ep)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_EP_DISABLE, ep);
|
|
}
|
|
|
|
static int usb_raw_configure(int fd)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_CONFIGURE, 0);
|
|
}
|
|
|
|
static int usb_raw_vbus_draw(int fd, uint32 power)
|
|
{
|
|
return ioctl(fd, USB_RAW_IOCTL_VBUS_DRAW, power);
|
|
}
|
|
|
|
#define MAX_USB_FDS 6
|
|
|
|
struct usb_info {
|
|
int fd;
|
|
struct usb_device_index index;
|
|
};
|
|
|
|
static struct usb_info usb_devices[MAX_USB_FDS];
|
|
static int usb_devices_num;
|
|
|
|
static struct usb_device_index* add_usb_index(int fd, const char* dev, size_t dev_len)
|
|
{
|
|
int i = __atomic_fetch_add(&usb_devices_num, 1, __ATOMIC_RELAXED);
|
|
if (i >= MAX_USB_FDS)
|
|
return NULL;
|
|
|
|
int rv = 0;
|
|
NONFAILING(rv = parse_usb_descriptor(dev, dev_len, &usb_devices[i].index));
|
|
if (!rv)
|
|
return NULL;
|
|
|
|
__atomic_store_n(&usb_devices[i].fd, fd, __ATOMIC_RELEASE);
|
|
return &usb_devices[i].index;
|
|
}
|
|
|
|
static struct usb_device_index* lookup_usb_index(int fd)
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAX_USB_FDS; i++) {
|
|
if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
|
|
return &usb_devices[i].index;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_control_io
|
|
static int lookup_interface(int fd, uint8 bInterfaceNumber, uint8 bAlternateSetting)
|
|
{
|
|
struct usb_device_index* index = lookup_usb_index(fd);
|
|
int i;
|
|
|
|
if (!index)
|
|
return -1;
|
|
|
|
for (i = 0; i < index->ifaces_num; i++) {
|
|
if (index->ifaces[i].bInterfaceNumber == bInterfaceNumber &&
|
|
index->ifaces[i].bAlternateSetting == bAlternateSetting)
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
static void set_interface(int fd, int n)
|
|
{
|
|
struct usb_device_index* index = lookup_usb_index(fd);
|
|
int ep;
|
|
|
|
if (!index)
|
|
return;
|
|
|
|
if (index->iface_cur >= 0 && index->iface_cur < index->ifaces_num) {
|
|
for (ep = 0; ep < index->ifaces[index->iface_cur].eps_num; ep++) {
|
|
int rv = usb_raw_ep_disable(fd, ep);
|
|
if (rv < 0) {
|
|
debug("set_interface: failed to disable endpoint %d\n", ep);
|
|
} else {
|
|
debug("set_interface: endpoint %d disabled\n", ep);
|
|
}
|
|
}
|
|
}
|
|
if (n >= 0 && n < index->ifaces_num) {
|
|
for (ep = 0; ep < index->ifaces[n].eps_num; ep++) {
|
|
int rv = usb_raw_ep_enable(fd, &index->ifaces[n].eps[ep]);
|
|
if (rv < 0) {
|
|
debug("set_interface: failed to enable endpoint %d\n", ep);
|
|
} else {
|
|
debug("set_interface: endpoint %d enabled as %d\n", ep, rv);
|
|
}
|
|
}
|
|
index->iface_cur = n;
|
|
}
|
|
}
|
|
|
|
static int configure_device(int fd)
|
|
{
|
|
struct usb_device_index* index = lookup_usb_index(fd);
|
|
|
|
if (!index)
|
|
return -1;
|
|
|
|
int rv = usb_raw_vbus_draw(fd, index->bMaxPower);
|
|
if (rv < 0) {
|
|
debug("configure_device: usb_raw_vbus_draw failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
rv = usb_raw_configure(fd);
|
|
if (rv < 0) {
|
|
debug("configure_device: usb_raw_configure failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
set_interface(fd, 0);
|
|
return 0;
|
|
}
|
|
|
|
#if USB_DEBUG
|
|
|
|
#include <linux/hid.h>
|
|
#include <linux/usb/audio.h>
|
|
#include <linux/usb/cdc.h>
|
|
#include <linux/usb/ch11.h>
|
|
#include <linux/usb/ch9.h>
|
|
|
|
// drivers/usb/class/usblp.c
|
|
#define USBLP_REQ_GET_ID 0x00
|
|
#define USBLP_REQ_GET_STATUS 0x01
|
|
#define USBLP_REQ_RESET 0x02
|
|
|
|
const char* usb_class_to_string(unsigned value)
|
|
{
|
|
switch (value) {
|
|
case USB_CLASS_PER_INTERFACE:
|
|
return "USB_CLASS_PER_INTERFACE";
|
|
case USB_CLASS_AUDIO:
|
|
return "USB_CLASS_AUDIO";
|
|
case USB_CLASS_COMM:
|
|
return "USB_CLASS_COMM";
|
|
case USB_CLASS_HID:
|
|
return "USB_CLASS_HID";
|
|
case USB_CLASS_PHYSICAL:
|
|
return "USB_CLASS_PHYSICAL";
|
|
case USB_CLASS_STILL_IMAGE:
|
|
return "USB_CLASS_STILL_IMAGE";
|
|
case USB_CLASS_PRINTER:
|
|
return "USB_CLASS_PRINTER";
|
|
case USB_CLASS_MASS_STORAGE:
|
|
return "USB_CLASS_MASS_STORAGE";
|
|
case USB_CLASS_HUB:
|
|
return "USB_CLASS_HUB";
|
|
case USB_CLASS_CDC_DATA:
|
|
return "USB_CLASS_CDC_DATA";
|
|
case USB_CLASS_CSCID:
|
|
return "USB_CLASS_CSCID";
|
|
case USB_CLASS_CONTENT_SEC:
|
|
return "USB_CLASS_CONTENT_SEC";
|
|
case USB_CLASS_VIDEO:
|
|
return "USB_CLASS_VIDEO";
|
|
case USB_CLASS_WIRELESS_CONTROLLER:
|
|
return "USB_CLASS_WIRELESS_CONTROLLER";
|
|
case USB_CLASS_MISC:
|
|
return "USB_CLASS_MISC";
|
|
case USB_CLASS_APP_SPEC:
|
|
return "USB_CLASS_APP_SPEC";
|
|
case USB_CLASS_VENDOR_SPEC:
|
|
return "USB_CLASS_VENDOR_SPEC";
|
|
}
|
|
return "unknown";
|
|
}
|
|
|
|
static void analyze_usb_device(struct usb_device_index* index)
|
|
{
|
|
debug("analyze_usb_device: idVendor = %04x\n", (unsigned)index->dev->idVendor);
|
|
debug("analyze_usb_device: idProduct = %04x\n", (unsigned)index->dev->idProduct);
|
|
|
|
debug("analyze_usb_device: bDeviceClass = %x (%s)\n", (unsigned)index->dev->bDeviceClass,
|
|
usb_class_to_string(index->dev->bDeviceClass));
|
|
debug("analyze_usb_device: bDeviceSubClass = %x\n", (unsigned)index->dev->bDeviceSubClass);
|
|
debug("analyze_usb_device: bDeviceProtocol = %x\n", (unsigned)index->dev->bDeviceProtocol);
|
|
|
|
for (int i = 0; i < index->ifaces_num; i++) {
|
|
struct usb_interface_descriptor* iface = index->ifaces[i].iface;
|
|
debug("analyze_usb_device: interface #%d:\n", i);
|
|
debug("analyze_usb_device: bInterfaceClass = %x (%s)\n", (unsigned)iface->bInterfaceClass,
|
|
usb_class_to_string(iface->bInterfaceClass));
|
|
debug("analyze_usb_device: bInterfaceSubClass = %x\n", (unsigned)iface->bInterfaceSubClass);
|
|
debug("analyze_usb_device: bInterfaceProtocol = %x\n", (unsigned)iface->bInterfaceProtocol);
|
|
}
|
|
}
|
|
|
|
static bool analyze_control_request_standard(struct usb_device_index* index, struct usb_ctrlrequest* ctrl)
|
|
{
|
|
uint8 bDeviceClass = index->bDeviceClass;
|
|
uint8 bInterfaceClass = index->ifaces[index->iface_cur].bInterfaceClass;
|
|
|
|
// For some reason HID class GET_DESCRIPTOR requests are STANDARD.
|
|
if (bDeviceClass == USB_CLASS_HID || bInterfaceClass == USB_CLASS_HID) {
|
|
switch (ctrl->bRequest) {
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
debug("analyze_control_request: req = USB_REQ_GET_DESCRIPTOR\n");
|
|
switch (ctrl->wValue >> 8) {
|
|
case HID_DT_HID:
|
|
debug("analyze_control_request: desc = HID_DT_HID\n");
|
|
return true;
|
|
case HID_DT_REPORT:
|
|
debug("analyze_control_request: desc = HID_DT_REPORT\n");
|
|
return true;
|
|
case HID_DT_PHYSICAL:
|
|
debug("analyze_control_request: desc = HID_DT_PHYSICAL\n");
|
|
return false;
|
|
}
|
|
}
|
|
// Fallthrough to lookup normal STANDARD requests.
|
|
}
|
|
|
|
switch (ctrl->bRequest) {
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
debug("analyze_control_request: req = USB_REQ_GET_DESCRIPTOR\n");
|
|
switch (ctrl->wValue >> 8) {
|
|
case USB_DT_DEVICE:
|
|
debug("analyze_control_request: desc = USB_DT_DEVICE\n");
|
|
return true;
|
|
case USB_DT_CONFIG:
|
|
debug("analyze_control_request: desc = USB_DT_CONFIG, index = %d\n", (int)(ctrl->wValue & 0xff));
|
|
return true;
|
|
case USB_DT_STRING:
|
|
debug("analyze_control_request: desc = USB_DT_STRING\n");
|
|
return true;
|
|
case USB_DT_INTERFACE:
|
|
debug("analyze_control_request: desc = USB_DT_INTERFACE\n");
|
|
break;
|
|
case USB_DT_ENDPOINT:
|
|
debug("analyze_control_request: desc = USB_DT_ENDPOINT\n");
|
|
break;
|
|
case USB_DT_DEVICE_QUALIFIER:
|
|
debug("analyze_control_request: desc = USB_DT_DEVICE_QUALIFIER\n");
|
|
return true;
|
|
case USB_DT_OTHER_SPEED_CONFIG:
|
|
debug("analyze_control_request: desc = USB_DT_OTHER_SPEED_CONFIG\n");
|
|
break;
|
|
case USB_DT_INTERFACE_POWER:
|
|
debug("analyze_control_request: desc = USB_DT_INTERFACE_POWER\n");
|
|
break;
|
|
case USB_DT_OTG:
|
|
debug("analyze_control_request: desc = USB_DT_OTG\n");
|
|
break;
|
|
case USB_DT_DEBUG:
|
|
debug("analyze_control_request: desc = USB_DT_DEBUG\n");
|
|
break;
|
|
case USB_DT_INTERFACE_ASSOCIATION:
|
|
debug("analyze_control_request: desc = USB_DT_INTERFACE_ASSOCIATION\n");
|
|
break;
|
|
case USB_DT_SECURITY:
|
|
debug("analyze_control_request: desc = USB_DT_SECURITY\n");
|
|
break;
|
|
case USB_DT_KEY:
|
|
debug("analyze_control_request: desc = USB_DT_KEY\n");
|
|
break;
|
|
case USB_DT_ENCRYPTION_TYPE:
|
|
debug("analyze_control_request: desc = USB_DT_ENCRYPTION_TYPE\n");
|
|
break;
|
|
case USB_DT_BOS:
|
|
debug("analyze_control_request: desc = USB_DT_BOS\n");
|
|
return true;
|
|
case USB_DT_DEVICE_CAPABILITY:
|
|
debug("analyze_control_request: desc = USB_DT_DEVICE_CAPABILITY\n");
|
|
break;
|
|
case USB_DT_WIRELESS_ENDPOINT_COMP:
|
|
debug("analyze_control_request: desc = USB_DT_WIRELESS_ENDPOINT_COMP\n");
|
|
break;
|
|
case USB_DT_WIRE_ADAPTER:
|
|
debug("analyze_control_request: desc = USB_DT_WIRE_ADAPTER\n");
|
|
break;
|
|
case USB_DT_RPIPE:
|
|
debug("analyze_control_request: desc = USB_DT_RPIPE\n");
|
|
break;
|
|
case USB_DT_CS_RADIO_CONTROL:
|
|
debug("analyze_control_request: desc = USB_DT_CS_RADIO_CONTROL\n");
|
|
break;
|
|
case USB_DT_PIPE_USAGE:
|
|
debug("analyze_control_request: desc = USB_DT_PIPE_USAGE\n");
|
|
break;
|
|
case USB_DT_SS_ENDPOINT_COMP:
|
|
debug("analyze_control_request: desc = USB_DT_SS_ENDPOINT_COMP\n");
|
|
break;
|
|
case USB_DT_SSP_ISOC_ENDPOINT_COMP:
|
|
debug("analyze_control_request: desc = USB_DT_SSP_ISOC_ENDPOINT_COMP\n");
|
|
break;
|
|
default:
|
|
debug("analyze_control_request: desc = unknown = 0x%x\n", (int)(ctrl->wValue >> 8));
|
|
break;
|
|
}
|
|
break;
|
|
case USB_REQ_GET_STATUS:
|
|
debug("analyze_control_request: req = USB_REQ_GET_STATUS\n");
|
|
break;
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
debug("analyze_control_request: req = USB_REQ_CLEAR_FEATURE\n");
|
|
break;
|
|
case USB_REQ_SET_FEATURE:
|
|
debug("analyze_control_request: req = USB_REQ_SET_FEATURE\n");
|
|
break;
|
|
case USB_REQ_GET_CONFIGURATION:
|
|
debug("analyze_control_request: req = USB_REQ_GET_CONFIGURATION\n");
|
|
return true;
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
debug("analyze_control_request: req = USB_REQ_SET_CONFIGURATION\n");
|
|
break;
|
|
case USB_REQ_GET_INTERFACE:
|
|
debug("analyze_control_request: req = USB_REQ_GET_INTERFACE\n");
|
|
return true;
|
|
case USB_REQ_SET_INTERFACE:
|
|
debug("analyze_control_request: req = USB_REQ_SET_INTERFACE\n");
|
|
break;
|
|
default:
|
|
debug("analyze_control_request: req = unknown = 0x%x\n", (int)ctrl->bRequest);
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool analyze_control_request_class(struct usb_device_index* index, struct usb_ctrlrequest* ctrl)
|
|
{
|
|
uint8 bDeviceClass = index->bDeviceClass;
|
|
uint8 bInterfaceClass = index->ifaces[index->iface_cur].bInterfaceClass;
|
|
|
|
if (bDeviceClass == USB_CLASS_HID || bInterfaceClass == USB_CLASS_HID) {
|
|
switch (ctrl->bRequest) {
|
|
case HID_REQ_GET_REPORT:
|
|
debug("analyze_control_request: req = HID_REQ_GET_REPORT\n");
|
|
return true;
|
|
case HID_REQ_GET_IDLE:
|
|
debug("analyze_control_request: req = HID_REQ_GET_IDLE\n");
|
|
break;
|
|
case HID_REQ_GET_PROTOCOL:
|
|
debug("analyze_control_request: req = HID_REQ_GET_PROTOCOL\n");
|
|
return true;
|
|
case HID_REQ_SET_REPORT:
|
|
debug("analyze_control_request: req = HID_REQ_SET_REPORT\n");
|
|
break;
|
|
case HID_REQ_SET_IDLE:
|
|
debug("analyze_control_request: req = HID_REQ_SET_IDLE\n");
|
|
break;
|
|
case HID_REQ_SET_PROTOCOL:
|
|
debug("analyze_control_request: req = HID_REQ_SET_PROTOCOL\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bDeviceClass == USB_CLASS_AUDIO || bInterfaceClass == USB_CLASS_AUDIO) {
|
|
switch (ctrl->bRequest) {
|
|
case UAC_SET_CUR:
|
|
debug("analyze_control_request: req = UAC_SET_CUR\n");
|
|
break;
|
|
case UAC_GET_CUR:
|
|
debug("analyze_control_request: req = UAC_GET_CUR\n");
|
|
return true;
|
|
case UAC_SET_MIN:
|
|
debug("analyze_control_request: req = UAC_SET_MIN\n");
|
|
break;
|
|
case UAC_GET_MIN:
|
|
debug("analyze_control_request: req = UAC_GET_MIN\n");
|
|
return true;
|
|
case UAC_SET_MAX:
|
|
debug("analyze_control_request: req = UAC_SET_MAX\n");
|
|
break;
|
|
case UAC_GET_MAX:
|
|
debug("analyze_control_request: req = UAC_GET_MAX\n");
|
|
return true;
|
|
case UAC_SET_RES:
|
|
debug("analyze_control_request: req = UAC_SET_RES\n");
|
|
break;
|
|
case UAC_GET_RES:
|
|
debug("analyze_control_request: req = UAC_GET_RES\n");
|
|
return true;
|
|
case UAC_SET_MEM:
|
|
debug("analyze_control_request: req = UAC_SET_MEM\n");
|
|
break;
|
|
case UAC_GET_MEM:
|
|
debug("analyze_control_request: req = UAC_GET_MEM\n");
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (bDeviceClass == USB_CLASS_PRINTER || bInterfaceClass == USB_CLASS_PRINTER) {
|
|
switch (ctrl->bRequest) {
|
|
case USBLP_REQ_GET_ID:
|
|
debug("analyze_control_request: req = USBLP_REQ_GET_ID\n");
|
|
return true;
|
|
case USBLP_REQ_GET_STATUS:
|
|
debug("analyze_control_request: req = USBLP_REQ_GET_STATUS\n");
|
|
return true;
|
|
case USBLP_REQ_RESET:
|
|
debug("analyze_control_request: req = USBLP_REQ_RESET\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bDeviceClass == USB_CLASS_HUB || bInterfaceClass == USB_CLASS_HUB) {
|
|
switch (ctrl->bRequest) {
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
switch (ctrl->wValue >> 8) {
|
|
case USB_DT_HUB:
|
|
debug("analyze_control_request: desc = USB_DT_HUB\n");
|
|
return true;
|
|
case USB_DT_SS_HUB:
|
|
debug("analyze_control_request: desc = USB_DT_SS_HUB\n");
|
|
return true;
|
|
}
|
|
case USB_REQ_GET_STATUS:
|
|
debug("analyze_control_request: req = USB_REQ_GET_STATUS\n");
|
|
return true;
|
|
case HUB_SET_DEPTH:
|
|
debug("analyze_control_request: req = HUB_SET_DEPTH\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bInterfaceClass == USB_CLASS_COMM) {
|
|
switch (ctrl->bRequest) {
|
|
case USB_CDC_SEND_ENCAPSULATED_COMMAND:
|
|
debug("analyze_control_request: req = USB_CDC_SEND_ENCAPSULATED_COMMAND\n");
|
|
break;
|
|
case USB_CDC_GET_ENCAPSULATED_RESPONSE:
|
|
debug("analyze_control_request: req = USB_CDC_GET_ENCAPSULATED_RESPONSE\n");
|
|
break;
|
|
case USB_CDC_REQ_SET_LINE_CODING:
|
|
debug("analyze_control_request: req = USB_CDC_REQ_SET_LINE_CODING\n");
|
|
break;
|
|
case USB_CDC_REQ_GET_LINE_CODING:
|
|
debug("analyze_control_request: req = USB_CDC_REQ_GET_LINE_CODING\n");
|
|
break;
|
|
case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
|
|
debug("analyze_control_request: req = USB_CDC_REQ_SET_CONTROL_LINE_STATE\n");
|
|
break;
|
|
case USB_CDC_REQ_SEND_BREAK:
|
|
debug("analyze_control_request: req = USB_CDC_REQ_SEND_BREAK\n");
|
|
break;
|
|
case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
|
|
debug("analyze_control_request: req = USB_CDC_SET_ETHERNET_MULTICAST_FILTERS\n");
|
|
break;
|
|
case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
|
|
debug("analyze_control_request: req = USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER\n");
|
|
break;
|
|
case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
|
|
debug("analyze_control_request: req = USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER\n");
|
|
break;
|
|
case USB_CDC_SET_ETHERNET_PACKET_FILTER:
|
|
debug("analyze_control_request: req = USB_CDC_SET_ETHERNET_PACKET_FILTER\n");
|
|
break;
|
|
case USB_CDC_GET_ETHERNET_STATISTIC:
|
|
debug("analyze_control_request: req = USB_CDC_GET_ETHERNET_STATISTIC\n");
|
|
break;
|
|
case USB_CDC_GET_NTB_PARAMETERS:
|
|
debug("analyze_control_request: req = USB_CDC_GET_NTB_PARAMETERS\n");
|
|
return true;
|
|
case USB_CDC_GET_NET_ADDRESS:
|
|
debug("analyze_control_request: req = USB_CDC_GET_NET_ADDRESS\n");
|
|
break;
|
|
case USB_CDC_SET_NET_ADDRESS:
|
|
debug("analyze_control_request: req = USB_CDC_SET_NET_ADDRESS\n");
|
|
break;
|
|
case USB_CDC_GET_NTB_FORMAT:
|
|
debug("analyze_control_request: req = USB_CDC_GET_NTB_FORMAT\n");
|
|
return true;
|
|
case USB_CDC_SET_NTB_FORMAT:
|
|
debug("analyze_control_request: req = USB_CDC_SET_NTB_FORMAT\n");
|
|
break;
|
|
case USB_CDC_GET_NTB_INPUT_SIZE:
|
|
debug("analyze_control_request: req = USB_CDC_GET_NTB_INPUT_SIZE\n");
|
|
return true;
|
|
case USB_CDC_SET_NTB_INPUT_SIZE:
|
|
debug("analyze_control_request: req = USB_CDC_SET_NTB_INPUT_SIZE\n");
|
|
break;
|
|
case USB_CDC_GET_MAX_DATAGRAM_SIZE:
|
|
debug("analyze_control_request: req = USB_CDC_GET_MAX_DATAGRAM_SIZE\n");
|
|
return true;
|
|
case USB_CDC_SET_MAX_DATAGRAM_SIZE:
|
|
debug("analyze_control_request: req = USB_CDC_SET_MAX_DATAGRAM_SIZE\n");
|
|
break;
|
|
case USB_CDC_GET_CRC_MODE:
|
|
debug("analyze_control_request: req = USB_CDC_GET_CRC_MODE\n");
|
|
return true;
|
|
case USB_CDC_SET_CRC_MODE:
|
|
debug("analyze_control_request: req = USB_CDC_SET_CRC_MODE\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool analyze_control_request_vendor(struct usb_device_index* index, struct usb_ctrlrequest* ctrl)
|
|
{
|
|
// Ignore vendor requests for now.
|
|
return true;
|
|
}
|
|
|
|
static void analyze_control_request(int fd, struct usb_ctrlrequest* ctrl)
|
|
{
|
|
struct usb_device_index* index = lookup_usb_index(fd);
|
|
|
|
if (!index)
|
|
return;
|
|
|
|
switch (ctrl->bRequestType & USB_TYPE_MASK) {
|
|
case USB_TYPE_STANDARD:
|
|
debug("analyze_control_request: type = USB_TYPE_STANDARD\n");
|
|
if (analyze_control_request_standard(index, ctrl))
|
|
return;
|
|
break;
|
|
case USB_TYPE_CLASS:
|
|
debug("analyze_control_request: type = USB_TYPE_CLASS\n");
|
|
if (analyze_control_request_class(index, ctrl))
|
|
return;
|
|
break;
|
|
case USB_TYPE_VENDOR:
|
|
debug("analyze_control_request: type = USB_TYPE_VENDOR\n");
|
|
if (analyze_control_request_vendor(index, ctrl))
|
|
return;
|
|
break;
|
|
}
|
|
|
|
if (ctrl->bRequestType & USB_DIR_IN) {
|
|
char message[128];
|
|
debug("analyze_control_request: unknown control request\n");
|
|
snprintf(&message[0], sizeof(message), "BUG: unknown control request (0x%x, 0x%x, 0x%x, 0x%x, %d)",
|
|
ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex, ctrl->wLength);
|
|
write_file("/dev/kmsg", &message[0]);
|
|
}
|
|
}
|
|
|
|
#endif // USB_DEBUG
|
|
|
|
#define USB_MAX_PACKET_SIZE 4096
|
|
|
|
struct usb_raw_control_event {
|
|
struct usb_raw_event inner;
|
|
struct usb_ctrlrequest ctrl;
|
|
char data[USB_MAX_PACKET_SIZE];
|
|
};
|
|
|
|
struct usb_raw_ep_io_data {
|
|
struct usb_raw_ep_io inner;
|
|
char data[USB_MAX_PACKET_SIZE];
|
|
};
|
|
|
|
struct vusb_connect_string_descriptor {
|
|
uint32 len;
|
|
char* str;
|
|
} __attribute__((packed));
|
|
|
|
struct vusb_connect_descriptors {
|
|
uint32 qual_len;
|
|
char* qual;
|
|
uint32 bos_len;
|
|
char* bos;
|
|
uint32 strs_len;
|
|
struct vusb_connect_string_descriptor strs[0];
|
|
} __attribute__((packed));
|
|
|
|
static const char default_string[] = {
|
|
8, USB_DT_STRING,
|
|
's', 0, 'y', 0, 'z', 0 // UTF16-encoded "syz"
|
|
};
|
|
|
|
static const char default_lang_id[] = {
|
|
4, USB_DT_STRING,
|
|
0x09, 0x04 // English (United States)
|
|
};
|
|
|
|
static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs, const struct usb_ctrlrequest* ctrl,
|
|
char** response_data, uint32* response_length)
|
|
{
|
|
struct usb_device_index* index = lookup_usb_index(fd);
|
|
uint8 str_idx;
|
|
|
|
if (!index)
|
|
return false;
|
|
|
|
switch (ctrl->bRequestType & USB_TYPE_MASK) {
|
|
case USB_TYPE_STANDARD:
|
|
switch (ctrl->bRequest) {
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
switch (ctrl->wValue >> 8) {
|
|
case USB_DT_DEVICE:
|
|
*response_data = (char*)index->dev;
|
|
*response_length = sizeof(*index->dev);
|
|
return true;
|
|
case USB_DT_CONFIG:
|
|
*response_data = (char*)index->config;
|
|
*response_length = index->config_length;
|
|
return true;
|
|
case USB_DT_STRING:
|
|
str_idx = (uint8)ctrl->wValue;
|
|
if (descs && str_idx < descs->strs_len) {
|
|
*response_data = descs->strs[str_idx].str;
|
|
*response_length = descs->strs[str_idx].len;
|
|
return true;
|
|
}
|
|
if (str_idx == 0) {
|
|
*response_data = (char*)&default_lang_id[0];
|
|
*response_length = default_lang_id[0];
|
|
return true;
|
|
}
|
|
*response_data = (char*)&default_string[0];
|
|
*response_length = default_string[0];
|
|
return true;
|
|
case USB_DT_BOS:
|
|
*response_data = descs->bos;
|
|
*response_length = descs->bos_len;
|
|
return true;
|
|
case USB_DT_DEVICE_QUALIFIER:
|
|
if (!descs->qual) {
|
|
// Fill in DEVICE_QUALIFIER based on DEVICE if not provided.
|
|
struct usb_qualifier_descriptor* qual =
|
|
(struct usb_qualifier_descriptor*)response_data;
|
|
qual->bLength = sizeof(*qual);
|
|
qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER;
|
|
qual->bcdUSB = index->dev->bcdUSB;
|
|
qual->bDeviceClass = index->dev->bDeviceClass;
|
|
qual->bDeviceSubClass = index->dev->bDeviceSubClass;
|
|
qual->bDeviceProtocol = index->dev->bDeviceProtocol;
|
|
qual->bMaxPacketSize0 = index->dev->bMaxPacketSize0;
|
|
qual->bNumConfigurations = index->dev->bNumConfigurations;
|
|
qual->bRESERVED = 0;
|
|
*response_length = sizeof(*qual);
|
|
return true;
|
|
}
|
|
*response_data = descs->qual;
|
|
*response_length = descs->qual_len;
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
fail("lookup_connect_response_in: unknown request");
|
|
return false;
|
|
}
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_connect
|
|
static bool lookup_connect_response_out_generic(int fd, const struct vusb_connect_descriptors* descs,
|
|
const struct usb_ctrlrequest* ctrl, bool* done)
|
|
{
|
|
switch (ctrl->bRequestType & USB_TYPE_MASK) {
|
|
case USB_TYPE_STANDARD:
|
|
switch (ctrl->bRequest) {
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
*done = true;
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
fail("lookup_connect_response_out: unknown request");
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_connect_ath9k
|
|
|
|
// drivers/net/wireless/ath/ath9k/hif_usb.h
|
|
#define ATH9K_FIRMWARE_DOWNLOAD 0x30
|
|
#define ATH9K_FIRMWARE_DOWNLOAD_COMP 0x31
|
|
|
|
static bool lookup_connect_response_out_ath9k(int fd, const struct vusb_connect_descriptors* descs,
|
|
const struct usb_ctrlrequest* ctrl, bool* done)
|
|
{
|
|
switch (ctrl->bRequestType & USB_TYPE_MASK) {
|
|
case USB_TYPE_STANDARD:
|
|
switch (ctrl->bRequest) {
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case USB_TYPE_VENDOR:
|
|
switch (ctrl->bRequest) {
|
|
case ATH9K_FIRMWARE_DOWNLOAD:
|
|
return true;
|
|
case ATH9K_FIRMWARE_DOWNLOAD_COMP:
|
|
*done = true;
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
fail("lookup_connect_response_out_ath9k: unknown request");
|
|
return false;
|
|
}
|
|
|
|
#endif
|
|
|
|
typedef bool (*lookup_connect_response_t)(int fd, const struct vusb_connect_descriptors* descs,
|
|
const struct usb_ctrlrequest* ctrl, bool* done);
|
|
|
|
static volatile long syz_usb_connect_impl(uint64 speed, uint64 dev_len, const char* dev,
|
|
const struct vusb_connect_descriptors* descs, lookup_connect_response_t lookup_connect_response_out)
|
|
{
|
|
debug("syz_usb_connect: dev: %p\n", dev);
|
|
if (!dev) {
|
|
debug("syz_usb_connect: dev is null\n");
|
|
return -1;
|
|
}
|
|
|
|
debug("syz_usb_connect: device data:\n");
|
|
debug_dump_data(dev, dev_len);
|
|
|
|
int fd = usb_raw_open();
|
|
if (fd < 0) {
|
|
debug("syz_usb_connect: usb_raw_open failed with %d\n", fd);
|
|
return fd;
|
|
}
|
|
if (fd >= MAX_FDS) {
|
|
close(fd);
|
|
debug("syz_usb_connect: too many open fds\n");
|
|
return -1;
|
|
}
|
|
debug("syz_usb_connect: usb_raw_open success\n");
|
|
|
|
struct usb_device_index* index = add_usb_index(fd, dev, dev_len);
|
|
if (!index) {
|
|
debug("syz_usb_connect: add_usb_index failed\n");
|
|
return -1;
|
|
}
|
|
debug("syz_usb_connect: add_usb_index success\n");
|
|
|
|
#if USB_DEBUG
|
|
NONFAILING(analyze_usb_device(index));
|
|
#endif
|
|
|
|
// TODO: consider creating two dummy_udc's per proc to increace the chance of
|
|
// triggering interaction between multiple USB devices within the same program.
|
|
char device[32];
|
|
sprintf(&device[0], "dummy_udc.%llu", procid);
|
|
int rv = usb_raw_init(fd, speed, "dummy_udc", &device[0]);
|
|
if (rv < 0) {
|
|
debug("syz_usb_connect: usb_raw_init failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
debug("syz_usb_connect: usb_raw_init success\n");
|
|
|
|
rv = usb_raw_run(fd);
|
|
if (rv < 0) {
|
|
debug("syz_usb_connect: usb_raw_run failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
debug("syz_usb_connect: usb_raw_run success\n");
|
|
|
|
bool done = false;
|
|
while (!done) {
|
|
struct usb_raw_control_event event;
|
|
event.inner.type = 0;
|
|
event.inner.length = sizeof(event.ctrl);
|
|
rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event);
|
|
if (rv < 0) {
|
|
debug("syz_usb_connect: usb_raw_event_fetch failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
if (event.inner.type != USB_RAW_EVENT_CONTROL)
|
|
continue;
|
|
|
|
debug("syz_usb_connect: bReqType: 0x%x (%s), bReq: 0x%x, wVal: 0x%x, wIdx: 0x%x, wLen: %d\n",
|
|
event.ctrl.bRequestType, (event.ctrl.bRequestType & USB_DIR_IN) ? "IN" : "OUT",
|
|
event.ctrl.bRequest, event.ctrl.wValue, event.ctrl.wIndex, event.ctrl.wLength);
|
|
|
|
#if USB_DEBUG
|
|
analyze_control_request(fd, &event.ctrl);
|
|
#endif
|
|
|
|
char* response_data = NULL;
|
|
uint32 response_length = 0;
|
|
|
|
if (event.ctrl.bRequestType & USB_DIR_IN) {
|
|
bool response_found = false;
|
|
NONFAILING(response_found = lookup_connect_response_in(fd, descs, &event.ctrl, &response_data, &response_length));
|
|
if (!response_found) {
|
|
debug("syz_usb_connect: unknown control IN request\n");
|
|
return -1;
|
|
}
|
|
} else {
|
|
if (!lookup_connect_response_out(fd, descs, &event.ctrl, &done)) {
|
|
debug("syz_usb_connect: unknown control OUT request\n");
|
|
return -1;
|
|
}
|
|
response_data = NULL;
|
|
response_length = event.ctrl.wLength;
|
|
}
|
|
|
|
if ((event.ctrl.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
|
|
event.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
|
|
rv = configure_device(fd);
|
|
if (rv < 0) {
|
|
debug("syz_usb_connect: configure_device failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
struct usb_raw_ep_io_data response;
|
|
response.inner.ep = 0;
|
|
response.inner.flags = 0;
|
|
if (response_length > sizeof(response.data))
|
|
response_length = 0;
|
|
if (event.ctrl.wLength < response_length)
|
|
response_length = event.ctrl.wLength;
|
|
response.inner.length = response_length;
|
|
if (response_data)
|
|
memcpy(&response.data[0], response_data, response_length);
|
|
else
|
|
memset(&response.data[0], 0, response_length);
|
|
|
|
if (event.ctrl.bRequestType & USB_DIR_IN) {
|
|
debug("syz_usb_connect: writing %d bytes\n", response.inner.length);
|
|
rv = usb_raw_ep0_write(fd, (struct usb_raw_ep_io*)&response);
|
|
} else {
|
|
rv = usb_raw_ep0_read(fd, (struct usb_raw_ep_io*)&response);
|
|
debug("syz_usb_connect: read %d bytes\n", response.inner.length);
|
|
debug_dump_data(&event.data[0], response.inner.length);
|
|
}
|
|
if (rv < 0) {
|
|
debug("syz_usb_connect: usb_raw_ep0_read/write failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
sleep_ms(200);
|
|
|
|
debug("syz_usb_connect: configured\n");
|
|
|
|
return fd;
|
|
}
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_connect
|
|
static volatile long syz_usb_connect(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
|
|
{
|
|
uint64 speed = a0;
|
|
uint64 dev_len = a1;
|
|
const char* dev = (const char*)a2;
|
|
const struct vusb_connect_descriptors* descs = (const struct vusb_connect_descriptors*)a3;
|
|
|
|
return syz_usb_connect_impl(speed, dev_len, dev, descs, &lookup_connect_response_out_generic);
|
|
}
|
|
#endif
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_connect_ath9k
|
|
static volatile long syz_usb_connect_ath9k(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
|
|
{
|
|
uint64 speed = a0;
|
|
uint64 dev_len = a1;
|
|
const char* dev = (const char*)a2;
|
|
const struct vusb_connect_descriptors* descs = (const struct vusb_connect_descriptors*)a3;
|
|
|
|
return syz_usb_connect_impl(speed, dev_len, dev, descs, &lookup_connect_response_out_ath9k);
|
|
}
|
|
#endif
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_control_io
|
|
struct vusb_descriptor {
|
|
uint8 req_type;
|
|
uint8 desc_type;
|
|
uint32 len;
|
|
char data[0];
|
|
} __attribute__((packed));
|
|
|
|
struct vusb_descriptors {
|
|
uint32 len;
|
|
struct vusb_descriptor* generic;
|
|
struct vusb_descriptor* descs[0];
|
|
} __attribute__((packed));
|
|
|
|
struct vusb_response {
|
|
uint8 type;
|
|
uint8 req;
|
|
uint32 len;
|
|
char data[0];
|
|
} __attribute__((packed));
|
|
|
|
struct vusb_responses {
|
|
uint32 len;
|
|
struct vusb_response* generic;
|
|
struct vusb_response* resps[0];
|
|
} __attribute__((packed));
|
|
|
|
static bool lookup_control_response(const struct vusb_descriptors* descs, const struct vusb_responses* resps,
|
|
struct usb_ctrlrequest* ctrl, char** response_data, uint32* response_length)
|
|
{
|
|
int descs_num = 0;
|
|
int resps_num = 0;
|
|
|
|
if (descs)
|
|
descs_num = (descs->len - offsetof(struct vusb_descriptors, descs)) / sizeof(descs->descs[0]);
|
|
if (resps)
|
|
resps_num = (resps->len - offsetof(struct vusb_responses, resps)) / sizeof(resps->resps[0]);
|
|
|
|
uint8 req = ctrl->bRequest;
|
|
uint8 req_type = ctrl->bRequestType & USB_TYPE_MASK;
|
|
uint8 desc_type = ctrl->wValue >> 8;
|
|
|
|
if (req == USB_REQ_GET_DESCRIPTOR) {
|
|
int i;
|
|
|
|
for (i = 0; i < descs_num; i++) {
|
|
struct vusb_descriptor* desc = descs->descs[i];
|
|
if (!desc)
|
|
continue;
|
|
if (desc->req_type == req_type && desc->desc_type == desc_type) {
|
|
*response_length = desc->len;
|
|
if (*response_length != 0)
|
|
*response_data = &desc->data[0];
|
|
else
|
|
*response_data = NULL;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (descs && descs->generic) {
|
|
*response_data = &descs->generic->data[0];
|
|
*response_length = descs->generic->len;
|
|
return true;
|
|
}
|
|
} else {
|
|
int i;
|
|
|
|
for (i = 0; i < resps_num; i++) {
|
|
struct vusb_response* resp = resps->resps[i];
|
|
if (!resp)
|
|
continue;
|
|
if (resp->type == req_type && resp->req == req) {
|
|
*response_length = resp->len;
|
|
if (*response_length != 0)
|
|
*response_data = &resp->data[0];
|
|
else
|
|
*response_data = NULL;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (resps && resps->generic) {
|
|
*response_data = &resps->generic->data[0];
|
|
*response_length = resps->generic->len;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static volatile long syz_usb_control_io(volatile long a0, volatile long a1, volatile long a2)
|
|
{
|
|
int fd = a0;
|
|
const struct vusb_descriptors* descs = (const struct vusb_descriptors*)a1;
|
|
const struct vusb_responses* resps = (const struct vusb_responses*)a2;
|
|
|
|
struct usb_raw_control_event event;
|
|
event.inner.type = 0;
|
|
event.inner.length = USB_MAX_PACKET_SIZE;
|
|
int rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event);
|
|
if (rv < 0) {
|
|
debug("syz_usb_control_io: usb_raw_ep0_read failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
if (event.inner.type != USB_RAW_EVENT_CONTROL) {
|
|
debug("syz_usb_control_io: wrong event type: %d\n", (int)event.inner.type);
|
|
return -1;
|
|
}
|
|
|
|
debug("syz_usb_control_io: bReqType: 0x%x (%s), bReq: 0x%x, wVal: 0x%x, wIdx: 0x%x, wLen: %d\n",
|
|
event.ctrl.bRequestType, (event.ctrl.bRequestType & USB_DIR_IN) ? "IN" : "OUT",
|
|
event.ctrl.bRequest, event.ctrl.wValue, event.ctrl.wIndex, event.ctrl.wLength);
|
|
|
|
#if USB_DEBUG
|
|
analyze_control_request(fd, &event.ctrl);
|
|
#endif
|
|
|
|
bool response_found = false;
|
|
char* response_data = NULL;
|
|
uint32 response_length = 0;
|
|
|
|
if ((event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength) {
|
|
NONFAILING(response_found = lookup_control_response(descs, resps, &event.ctrl, &response_data, &response_length));
|
|
if (!response_found) {
|
|
debug("syz_usb_control_io: unknown control IN request\n");
|
|
return -1;
|
|
}
|
|
} else {
|
|
if ((event.ctrl.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD ||
|
|
event.ctrl.bRequest == USB_REQ_SET_INTERFACE) {
|
|
int iface_num = event.ctrl.wIndex;
|
|
int alt_set = event.ctrl.wValue;
|
|
debug("syz_usb_control_io: setting interface (%d, %d)\n", iface_num, alt_set);
|
|
int iface_index = lookup_interface(fd, iface_num, alt_set);
|
|
if (iface_index < 0) {
|
|
debug("syz_usb_control_io: interface (%d, %d) not found\n", iface_num, alt_set);
|
|
} else {
|
|
set_interface(fd, iface_index);
|
|
debug("syz_usb_control_io: interface (%d, %d) set\n", iface_num, alt_set);
|
|
}
|
|
}
|
|
|
|
response_length = event.ctrl.wLength;
|
|
}
|
|
|
|
struct usb_raw_ep_io_data response;
|
|
response.inner.ep = 0;
|
|
response.inner.flags = 0;
|
|
if (response_length > sizeof(response.data))
|
|
response_length = 0;
|
|
if (event.ctrl.wLength < response_length)
|
|
response_length = event.ctrl.wLength;
|
|
if ((event.ctrl.bRequestType & USB_DIR_IN) && !event.ctrl.wLength) {
|
|
// Something fishy is going on, try to read more data.
|
|
response_length = USB_MAX_PACKET_SIZE;
|
|
}
|
|
response.inner.length = response_length;
|
|
if (response_data)
|
|
memcpy(&response.data[0], response_data, response_length);
|
|
else
|
|
memset(&response.data[0], 0, response_length);
|
|
|
|
if ((event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength) {
|
|
debug("syz_usb_control_io: writing %d bytes\n", response.inner.length);
|
|
debug_dump_data(&response.data[0], response.inner.length);
|
|
rv = usb_raw_ep0_write(fd, (struct usb_raw_ep_io*)&response);
|
|
} else {
|
|
rv = usb_raw_ep0_read(fd, (struct usb_raw_ep_io*)&response);
|
|
debug("syz_usb_control_io: read %d bytes\n", response.inner.length);
|
|
debug_dump_data(&response.data[0], response.inner.length);
|
|
}
|
|
if (rv < 0) {
|
|
debug("syz_usb_control_io: usb_raw_ep0_read/write failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
|
|
sleep_ms(200);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_ep_write
|
|
static volatile long syz_usb_ep_write(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
|
|
{
|
|
int fd = a0;
|
|
uint16 ep = a1;
|
|
uint32 len = a2;
|
|
char* data = (char*)a3;
|
|
|
|
struct usb_raw_ep_io_data io_data;
|
|
io_data.inner.ep = ep;
|
|
io_data.inner.flags = 0;
|
|
if (len > sizeof(io_data.data))
|
|
len = sizeof(io_data.data);
|
|
io_data.inner.length = len;
|
|
NONFAILING(memcpy(&io_data.data[0], data, len));
|
|
|
|
int rv = usb_raw_ep_write(fd, (struct usb_raw_ep_io*)&io_data);
|
|
if (rv < 0) {
|
|
debug("syz_usb_ep_write: usb_raw_ep_write failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
|
|
sleep_ms(200);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_ep_read
|
|
static volatile long syz_usb_ep_read(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
|
|
{
|
|
int fd = a0;
|
|
uint16 ep = a1;
|
|
uint32 len = a2;
|
|
char* data = (char*)a3;
|
|
|
|
struct usb_raw_ep_io_data io_data;
|
|
io_data.inner.ep = ep;
|
|
io_data.inner.flags = 0;
|
|
if (len > sizeof(io_data.data))
|
|
len = sizeof(io_data.data);
|
|
io_data.inner.length = len;
|
|
|
|
int rv = usb_raw_ep_read(fd, (struct usb_raw_ep_io*)&io_data);
|
|
if (rv < 0) {
|
|
debug("syz_usb_ep_read: usb_raw_ep_read failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
|
|
NONFAILING(memcpy(&data[0], &io_data.data[0], io_data.inner.length));
|
|
|
|
debug("syz_usb_ep_read: received data:\n");
|
|
debug_dump_data(&io_data.data[0], io_data.inner.length);
|
|
|
|
sleep_ms(200);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_disconnect
|
|
static volatile long syz_usb_disconnect(volatile long a0)
|
|
{
|
|
int fd = a0;
|
|
|
|
int rv = close(fd);
|
|
|
|
sleep_ms(200);
|
|
|
|
return rv;
|
|
}
|
|
#endif
|