ok  	github.com/google/syzkaller/dashboard/app	(cached)
?   	github.com/google/syzkaller/dashboard/dashapi	[no test files]
?   	github.com/google/syzkaller/executor	[no test files]
ok  	github.com/google/syzkaller/pkg/ast	(cached)
ok  	github.com/google/syzkaller/pkg/bisect	(cached)
ok  	github.com/google/syzkaller/pkg/build	(cached)
?   	github.com/google/syzkaller/pkg/cmdprof	[no test files]
ok  	github.com/google/syzkaller/pkg/compiler	(cached)
ok  	github.com/google/syzkaller/pkg/config	(cached)
?   	github.com/google/syzkaller/pkg/cover	[no test files]
--- FAIL: TestGenerate (1.30s)
    --- FAIL: TestGenerate/netbsd/amd64 (0.03s)
    	csource_test.go:67: seed=1590211869273944743
        --- FAIL: TestGenerate/netbsd/amd64/3 (0.29s)
        	csource_test.go:123: opts: {Threaded:true Collide:false Repeat:false RepeatTimes:0 Procs:0 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void loop(void)
        		{
        			int i, call, thread;
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				syz_execute_func(0x20000100);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[4]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					use_temporary_dir();
        					do_sandbox_none();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:599:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:604:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor747556401 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/0 (0.29s)
        	csource_test.go:123: opts: {Threaded:false Collide:false Repeat:true RepeatTimes:0 Procs:0 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <fcntl.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0;; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_one(void)
        		{
        				intptr_t res = 0;
        			res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        			if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        			}
        		*(uint32_t*)0x20000080 = 0xc;
        			syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        			syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        			res = syscall(SYS_dup2, r[1], r[0]);
        			if (res != -1)
        				r[2] = res;
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        			syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        			syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        			res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        			if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        		memcpy((void*)0x20000300, "./file0\000", 8);
        			syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        		memcpy((void*)0x20000340, "./file0\000", 8);
        			syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        		*(uint32_t*)0x20000680 = 0;
        			syscall(SYS__lwp_wait, 0, 0x20000680ul);
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        			syz_execute_func(0x20000100);
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        			res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        			if (res != -1)
        				r[4] = res;
        			syz_usb_disconnect(r[4]);
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					use_temporary_dir();
        					do_sandbox_none();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:546:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:551:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor429479464 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/1 (0.29s)
        	csource_test.go:123: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void execute_one(void)
        		{
        			int i, call, thread;
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0;; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				syz_execute_func(0x20000100);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[4]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					use_temporary_dir();
        					do_sandbox_none();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:637:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:642:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor915830682 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/8 (0.29s)
        	csource_test.go:123: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Sandbox:setuid Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int wait_for_loop(int pid)
        		{
        			if (pid < 0)
        			exit(1);
        			int status = 0;
        			while (waitpid(-1, &status, WUNTRACED) != pid) {
        			}
        			return WEXITSTATUS(status);
        		}
        		
        		static int do_sandbox_setuid(void)
        		{
        			int pid = fork();
        			if (pid != 0)
        				return wait_for_loop(pid);
        			sandbox_common();
        			char pwbuf[1024];
        			struct passwd *pw, pwres;
        			if (getpwnam_r("nobody", &pwres, pwbuf, sizeof(pwbuf), &pw) != 0 || !pw)
        			exit(1);
        			if (setgroups(0, NULL))
        			exit(1);
        			if (setgid(pw->pw_gid))
        			exit(1);
        			if (setuid(pw->pw_uid))
        			exit(1);
        			loop();
        			exit(1);
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void execute_one(void)
        		{
        			int i, call, thread;
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0;; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				syz_execute_func(0x20000100);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[4]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					use_temporary_dir();
        					do_sandbox_setuid();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:637:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:642:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor471560877 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/2 (0.22s)
        	csource_test.go:123: opts: {Threaded:true Collide:true Repeat:true RepeatTimes:0 Procs:0 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void execute_one(void)
        		{
        			int i, call, thread;
        			int collide = 0;
        		again:
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					if (collide && (call % 2) == 0)
        						break;
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        			if (!collide) {
        				collide = 1;
        				goto again;
        			}
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0;; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				syz_execute_func(0x20000100);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[4]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					use_temporary_dir();
        					do_sandbox_none();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:637:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:642:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor666217436 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/4 (0.29s)
        	csource_test.go:123: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:10 Procs:0 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void execute_one(void)
        		{
        			int i, call, thread;
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0; iter < 10; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				syz_execute_func(0x20000100);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[4]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					use_temporary_dir();
        					do_sandbox_none();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:637:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:642:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor400703335 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/7 (0.15s)
        	csource_test.go:121: 
        --- FAIL: TestGenerate/netbsd/amd64/12 (0.15s)
        	csource_test.go:121: 
        --- FAIL: TestGenerate/netbsd/amd64/11 (0.15s)
        	csource_test.go:121: 
        --- FAIL: TestGenerate/netbsd/amd64/14 (0.15s)
        	csource_test.go:123: opts: {Threaded:true Collide:true Repeat:true RepeatTimes:0 Procs:2 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:true Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void execute_one(void)
        		{
        			if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
        			}
        			int i, call, thread;
        			int collide = 0;
        		again:
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					if (collide && (call % 2) == 0)
        						break;
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        			if (!collide) {
        				collide = 1;
        				goto again;
        			}
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0;; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23 + procid*4);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				syz_execute_func(0x20000100);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[4]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        			for (procid = 0; procid < 2; procid++) {
        				if (fork() == 0) {
        					use_temporary_dir();
        					do_sandbox_none();
        				}
        			}
        			sleep(1000000);
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:637:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:642:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor501285359 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/5 (0.15s)
        	csource_test.go:123: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void execute_one(void)
        		{
        			int i, call, thread;
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0;; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				syz_execute_func(0x20000100);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[4]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					use_temporary_dir();
        					do_sandbox_none();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:637:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:642:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor287820277 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/6 (0.15s)
        	csource_test.go:123: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:4 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:false}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void execute_one(void)
        		{
        			int i, call, thread;
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0;; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23 + procid*4);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				syz_execute_func(0x20000100);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[4]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        			for (procid = 0; procid < 4; procid++) {
        				if (fork() == 0) {
        					use_temporary_dir();
        					do_sandbox_none();
        				}
        			}
        			sleep(1000000);
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:637:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:642:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor141979856 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/13 (0.15s)
        	csource_test.go:123: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false UseTmpDir:true HandleSegv:false Repro:false Trace:true}
        		program:
        		pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x400000)
        		getpeername$inet6(r0, &(0x7f0000000040), &(0x7f0000000080)=0xc)
        		select(0x40, &(0x7f00000000c0)={0x4, 0x10001, 0x80000001, 0xb66, 0x7, 0xd3d, 0x7, 0x5}, &(0x7f0000000100)={0x200, 0x4341, 0x8, 0x5, 0x1, 0x3f2e, 0xe2, 0x2}, &(0x7f0000000140)={0x1, 0x441a, 0xffffffff, 0x5, 0x2ff, 0x0, 0x7f, 0x2}, &(0x7f0000000180)={0x7fffffff, 0x81})
        		r2 = dup2(r1, r0)
        		sendto$inet(r2, &(0x7f00000001c0)="37bcacb5043b866bd3e27bd0822227f1311d4ce1669c91a1b912b8", 0x1b, 0x2, &(0x7f0000000200)={0x2, 0x3}, 0xc)
        		setitimer(0x3, &(0x7f0000000240)={{0x8, 0x100000000}, {0x2, 0x4}}, &(0x7f0000000280))
        		pipe2(&(0x7f00000002c0)={0xffffffffffffffff, <r3=>0xffffffffffffffff}, 0x4)
        		mkdirat(r3, &(0x7f0000000300)='./file0\x00', 0x184)
        		openat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', 0x400000, 0x22c)
        		_lwp_wait(0x0, &(0x7f0000000680))
        		syz_emit_ethernet(0xca, &(0x7f0000000000)="8e7331a0f13f62d1a70eabdb367815b23fa65174b2c5bf01259fdcc5e2990a84eb324cd608f00ff168b0d25dc218ba1f0b8e2f2865c1eebf5b1f0b1630cf26d1f4cdb5c6e2fca24d81fe9352cccddd598ffee55aae700b07161de95f24d85129e1ed386ad0041b404b226e4e1faad5e2b4bb4b11d237d95b626b0bbdae9e291e008e78d6142a4e517b08fb6f124661f7cbe53d59e89eb6779ea06d312dcac95a8f41a46438fccb2d052061679bc6120d688f0d01e883253f73b83c4bfd87a14019a24938b389923a94d1")
        		syz_execute_func(&(0x7f0000000100)="f390660f38f863fd660fe2c640dd16e62a66410f5736d9f8c421f9d6626dc4e3150d33f3c4e3791d5b5470")
        		syz_extract_tcp_res(&(0x7f0000000140), 0x9, 0x0)
        		r4 = syz_usb_connect(0x3, 0x7b, &(0x7f0000000180)="9caf95de703c582f660a94f38633404bfbf07b4010c74782b25aa5884a0966151618367cb349d52e5db4b881939f710a7f9a47983136510e4757a5ca086a592caef8d429f2b7dac6c3ba218bc8436b8a25ebc7da203f4b54739024e0caed49403efb3bf6158310c2b383267d128cd8605b743837c9daedee86b22d", &(0x7f0000000200)="05898210b33510fdb8967d5d7213fa29a3d2a6281b62a9f7ebfed27bb9bcb1550475a4cccef28e24623738b889f74e1addbab8bfedd67f1103c63a134633a256397282abc40d614cf0053362ba35f72d0105fa66efb6afdecd5e884813fafb2c0778ea87af0794e2f4b6f49f464f2feadfb110fc2587db62818d5b951976775a95649d073e82e733e0df988913e4b3b9851d2fa771726a9cc603c7f7bde40e68")
        		syz_usb_disconnect(r4)
        		
        	csource_test.go:124: failed to build program:
        		// autogenerated by syzkaller (https://github.com/google/syzkaller)
        		
        		#define _GNU_SOURCE 
        		
        		#include <dev/usb/usb.h>
        		#include <dev/usb/usbhid.h>
        		#include <dev/usb/vhci.h>
        		#include <dirent.h>
        		#include <endian.h>
        		#include <errno.h>
        		#include <fcntl.h>
        		#include <pthread.h>
        		#include <pwd.h>
        		#include <signal.h>
        		#include <stdarg.h>
        		#include <stdbool.h>
        		#include <stdint.h>
        		#include <stdio.h>
        		#include <stdlib.h>
        		#include <string.h>
        		#include <sys/ioctl.h>
        		#include <sys/resource.h>
        		#include <sys/stat.h>
        		#include <sys/syscall.h>
        		#include <sys/types.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		static unsigned long long procid;
        		
        		static void kill_and_wait(int pid, int* status)
        		{
        			kill(pid, SIGKILL);
        			while (waitpid(-1, status, 0) != pid) {
        			}
        		}
        		
        		static void sleep_ms(uint64_t ms)
        		{
        			usleep(ms * 1000);
        		}
        		
        		static uint64_t current_time_ms(void)
        		{
        			struct timespec ts;
        			if (clock_gettime(CLOCK_MONOTONIC, &ts))
        			exit(1);
        			return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
        		}
        		
        		static void use_temporary_dir(void)
        		{
        			char tmpdir_template[] = "./syzkaller.XXXXXX";
        			char* tmpdir = mkdtemp(tmpdir_template);
        			if (!tmpdir)
        			exit(1);
        			if (chmod(tmpdir, 0777))
        			exit(1);
        			if (chdir(tmpdir))
        			exit(1);
        		}
        		
        		static void remove_dir(const char* dir)
        		{
        			DIR* dp;
        			struct dirent* ep;
        			dp = opendir(dir);
        			if (dp == NULL)
        			exit(1);
        			while ((ep = readdir(dp))) {
        				if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
        					continue;
        				char filename[FILENAME_MAX];
        				snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
        				struct stat st;
        				if (lstat(filename, &st))
        			exit(1);
        				if (S_ISDIR(st.st_mode)) {
        					remove_dir(filename);
        					continue;
        				}
        				if (unlink(filename))
        			exit(1);
        			}
        			closedir(dp);
        			if (rmdir(dir))
        			exit(1);
        		}
        		
        		static void thread_start(void* (*fn)(void*), void* arg)
        		{
        			pthread_t th;
        			pthread_attr_t attr;
        			pthread_attr_init(&attr);
        			pthread_attr_setstacksize(&attr, 128 << 10);
        			int i;
        			for (i = 0; i < 100; i++) {
        				if (pthread_create(&th, &attr, fn, arg) == 0) {
        					pthread_attr_destroy(&attr);
        					return;
        				}
        				if (errno == EAGAIN) {
        					usleep(50);
        					continue;
        				}
        				break;
        			}
        			exit(1);
        		}
        		
        		typedef struct {
        			pthread_mutex_t mu;
        			pthread_cond_t cv;
        			int state;
        		} event_t;
        		
        		static void event_init(event_t* ev)
        		{
        			if (pthread_mutex_init(&ev->mu, 0))
        			exit(1);
        			if (pthread_cond_init(&ev->cv, 0))
        			exit(1);
        			ev->state = 0;
        		}
        		
        		static void event_reset(event_t* ev)
        		{
        			ev->state = 0;
        		}
        		
        		static void event_set(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			if (ev->state)
        			exit(1);
        			ev->state = 1;
        			pthread_mutex_unlock(&ev->mu);
        			pthread_cond_broadcast(&ev->cv);
        		}
        		
        		static void event_wait(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			while (!ev->state)
        				pthread_cond_wait(&ev->cv, &ev->mu);
        			pthread_mutex_unlock(&ev->mu);
        		}
        		
        		static int event_isset(event_t* ev)
        		{
        			pthread_mutex_lock(&ev->mu);
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		static int event_timedwait(event_t* ev, uint64_t timeout)
        		{
        			uint64_t start = current_time_ms();
        			uint64_t now = start;
        			pthread_mutex_lock(&ev->mu);
        			for (;;) {
        				if (ev->state)
        					break;
        				uint64_t remain = timeout - (now - start);
        				struct timespec ts;
        				ts.tv_sec = remain / 1000;
        				ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        				pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
        				now = current_time_ms();
        				if (now - start > timeout)
        					break;
        			}
        			int res = ev->state;
        			pthread_mutex_unlock(&ev->mu);
        			return res;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		/*
        		 * Redefinitions to match the linux types used in common_usb.h.
        		 */
        		
        		struct usb_endpoint_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bEndpointAddress;
        			uint8_t bmAttributes;
        			uint16_t wMaxPacketSize;
        			uint8_t bInterval;
        			uint8_t bRefresh;
        			uint8_t bSynchAddress;
        		} __attribute__((packed));
        		
        		struct usb_device_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint16_t idVendor;
        			uint16_t idProduct;
        			uint16_t bcdDevice;
        			uint8_t iManufacturer;
        			uint8_t iProduct;
        			uint8_t iSerialNumber;
        			uint8_t bNumConfigurations;
        		} __attribute__((packed));
        		
        		struct usb_config_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t wTotalLength;
        			uint8_t bNumInterfaces;
        			uint8_t bConfigurationValue;
        			uint8_t iConfiguration;
        			uint8_t bmAttributes;
        			uint8_t bMaxPower;
        		} __attribute__((packed));
        		
        		struct usb_interface_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bNumEndpoints;
        			uint8_t bInterfaceClass;
        			uint8_t bInterfaceSubClass;
        			uint8_t bInterfaceProtocol;
        			uint8_t iInterface;
        		} __attribute__((packed));
        		
        		struct usb_ctrlrequest {
        			uint8_t bRequestType;
        			uint8_t bRequest;
        			uint16_t wValue;
        			uint16_t wIndex;
        			uint16_t wLength;
        		} __attribute__((packed));
        		
        		struct usb_qualifier_descriptor {
        			uint8_t bLength;
        			uint8_t bDescriptorType;
        			uint16_t bcdUSB;
        			uint8_t bDeviceClass;
        			uint8_t bDeviceSubClass;
        			uint8_t bDeviceProtocol;
        			uint8_t bMaxPacketSize0;
        			uint8_t bNumConfigurations;
        			uint8_t bRESERVED;
        		} __attribute__((packed));
        		
        		#define USB_TYPE_MASK (0x03 << 5)
        		#define USB_TYPE_STANDARD (0x00 << 5)
        		#define USB_TYPE_CLASS (0x01 << 5)
        		#define USB_TYPE_VENDOR (0x02 << 5)
        		#define USB_TYPE_RESERVED (0x03 << 5)
        		
        		#define USB_DT_DEVICE 0x01
        		#define USB_DT_CONFIG 0x02
        		#define USB_DT_STRING 0x03
        		#define USB_DT_INTERFACE 0x04
        		#define USB_DT_ENDPOINT 0x05
        		#define USB_DT_DEVICE_QUALIFIER 0x06
        		#define USB_DT_OTHER_SPEED_CONFIG 0x07
        		#define USB_DT_INTERFACE_POWER 0x08
        		#define USB_DT_OTG 0x09
        		#define USB_DT_DEBUG 0x0a
        		#define USB_DT_INTERFACE_ASSOCIATION 0x0b
        		#define USB_DT_SECURITY 0x0c
        		#define USB_DT_KEY 0x0d
        		#define USB_DT_ENCRYPTION_TYPE 0x0e
        		#define USB_DT_BOS 0x0f
        		#define USB_DT_DEVICE_CAPABILITY 0x10
        		#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
        		#define USB_DT_WIRE_ADAPTER 0x21
        		#define USB_DT_RPIPE 0x22
        		#define USB_DT_CS_RADIO_CONTROL 0x23
        		#define USB_DT_PIPE_USAGE 0x24
        		#define USB_DT_SS_ENDPOINT_COMP 0x30
        		#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
        		
        		#define USB_REQ_GET_STATUS 0x00
        		#define USB_REQ_CLEAR_FEATURE 0x01
        		#define USB_REQ_SET_FEATURE 0x03
        		#define USB_REQ_SET_ADDRESS 0x05
        		#define USB_REQ_GET_DESCRIPTOR 0x06
        		#define USB_REQ_SET_DESCRIPTOR 0x07
        		#define USB_REQ_GET_CONFIGURATION 0x08
        		#define USB_REQ_SET_CONFIGURATION 0x09
        		#define USB_REQ_GET_INTERFACE 0x0A
        		#define USB_REQ_SET_INTERFACE 0x0B
        		#define USB_REQ_SYNCH_FRAME 0x0C
        		#define USB_REQ_SET_SEL 0x30
        		#define USB_REQ_SET_ISOCH_DELAY 0x31
        		
        		#define USB_REQ_SET_ENCRYPTION 0x0D
        		#define USB_REQ_GET_ENCRYPTION 0x0E
        		#define USB_REQ_RPIPE_ABORT 0x0E
        		#define USB_REQ_SET_HANDSHAKE 0x0F
        		#define USB_REQ_RPIPE_RESET 0x0F
        		#define USB_REQ_GET_HANDSHAKE 0x10
        		#define USB_REQ_SET_CONNECTION 0x11
        		#define USB_REQ_SET_SECURITY_DATA 0x12
        		#define USB_REQ_GET_SECURITY_DATA 0x13
        		#define USB_REQ_SET_WUSB_DATA 0x14
        		#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
        		#define USB_REQ_LOOPBACK_DATA_READ 0x16
        		#define USB_REQ_SET_INTERFACE_DS 0x17
        		
        		#define USB_REQ_GET_PARTNER_PDO 20
        		#define USB_REQ_GET_BATTERY_STATUS 21
        		#define USB_REQ_SET_PDO 22
        		#define USB_REQ_GET_VDM 23
        		#define USB_REQ_SEND_VDM 24
        		
        		#define USB_MAX_IFACE_NUM 4
        		#define USB_MAX_EP_NUM 32
        		#define USB_MAX_FDS 6
        		
        		struct usb_endpoint_index {
        			struct usb_endpoint_descriptor desc;
        			int handle;
        		};
        		
        		struct usb_iface_index {
        			struct usb_interface_descriptor* iface;
        			uint8_t bInterfaceNumber;
        			uint8_t bAlternateSetting;
        			uint8_t bInterfaceClass;
        			struct usb_endpoint_index eps[USB_MAX_EP_NUM];
        			int eps_num;
        		};
        		
        		struct usb_device_index {
        			struct usb_device_descriptor* dev;
        			struct usb_config_descriptor* config;
        			uint8_t bDeviceClass;
        			uint8_t bMaxPower;
        			int config_length;
        			struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
        			int ifaces_num;
        			int iface_cur;
        		};
        		
        		struct usb_info {
        			int fd;
        			struct usb_device_index index;
        		};
        		
        		static struct usb_info usb_devices[USB_MAX_FDS];
        		static int usb_devices_num;
        		
        		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_t desc_length = buffer[offset];
        				uint8_t 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);
        					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];
        					if (iface->eps_num < USB_MAX_EP_NUM) {
        						memcpy(&iface->eps[iface->eps_num].desc, buffer + offset, sizeof(iface->eps[iface->eps_num].desc));
        						iface->eps_num++;
        					}
        				}
        				offset += desc_length;
        			}
        			return true;
        		}
        		
        		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 >= USB_MAX_FDS)
        				return NULL;
        			int rv = 0;
        		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 < USB_MAX_FDS; i++) {
        				if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) {
        					return &usb_devices[i].index;
        				}
        			}
        			return NULL;
        		}
        		
        		struct vusb_connect_string_descriptor {
        			uint32_t len;
        			char* str;
        		} __attribute__((packed));
        		
        		struct vusb_connect_descriptors {
        			uint32_t qual_len;
        			char* qual;
        			uint32_t bos_len;
        			char* bos;
        			uint32_t 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
        		};
        		
        		static const char default_lang_id[] = {
        		    4, USB_DT_STRING,
        		    0x09, 0x04
        		};
        		
        		static bool lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
        						       const struct usb_ctrlrequest* ctrl,
        						       char** response_data, uint32_t* response_length)
        		{
        			struct usb_device_index* index = lookup_usb_index(fd);
        			uint8_t 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_t)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) {
        							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;
        			}
        			return false;
        		}
        		
        		typedef bool (*lookup_connect_out_response_t)(int fd, const struct vusb_connect_descriptors* descs,
        							      const struct usb_ctrlrequest* ctrl, bool* done);
        		
        		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;
        			}
        			return false;
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static int vhci_open(void)
        		{
        			return open("/dev/vhci", O_RDWR);
        		}
        		
        		static int vhci_setport(int fd, u_int port)
        		{
        			struct vhci_ioc_set_port args;
        			args.port = port;
        			return ioctl(fd, VHCI_IOC_SET_PORT, &args);
        		}
        		
        		static int vhci_usb_attach(int fd)
        		{
        			return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
        		}
        		
        		static int vhci_usb_recv(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = read(fd, ptr, size);
        				if (done < 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		static int vhci_usb_send(int fd, void* buf, size_t size)
        		{
        			uint8_t* ptr = (uint8_t*)buf;
        			ssize_t done;
        			while (1) {
        				done = write(fd, ptr, size);
        				if (done <= 0)
        					return -1;
        				if ((size_t)done == size)
        					return 0;
        				size -= done;
        				ptr += done;
        			}
        		}
        		
        		/* -------------------------------------------------------------------------- */
        		
        		static volatile long syz_usb_connect_impl(uint64_t speed, uint64_t dev_len,
        							  const char* dev, const struct vusb_connect_descriptors* descs,
        							  lookup_connect_out_response_t lookup_connect_response_out)
        		{
        			struct usb_device_index* index;
        			int portnum, fd, rv;
        			bool done;
        			portnum = procid + 1;
        			if (!dev) {
        				return -1;
        			}
        			if (portnum != 1) {
        				/* For now, we support only one proc. */
        				return -1;
        			}
        			fd = vhci_open();
        			if (fd < 0) {
        				return -1;
        			}
        			index = add_usb_index(fd, dev, dev_len);
        			if (!index) {
        				goto err;
        			}
        			rv = vhci_setport(fd, portnum);
        			if (rv != 0) {
        				goto err;
        			}
        			rv = vhci_usb_attach(fd);
        			if (rv != 0) {
        				goto err;
        			}
        			done = false;
        			while (!done) {
        				vhci_request_t req;
        				rv = vhci_usb_recv(fd, &req, sizeof(req));
        				if (rv != 0) {
        					goto err;
        				}
        				if (req.type != VHCI_REQ_CTRL) {
        					goto err;
        				}
        				char* response_data = NULL;
        				uint32_t response_length = 0;
        				char data[4096];
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					bool response_found = false;
        		response_found = lookup_connect_response_in(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &response_data, &response_length);
        					if (!response_found) {
        						goto err;
        					}
        				} else {
        					if (!lookup_connect_response_out(fd, descs, (const usb_ctrlrequest*)&req.u.ctrl, &done)) {
        						goto err;
        					}
        					response_data = NULL;
        					response_length = UGETW(req.u.ctrl.wLength);
        				}
        				if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        				    req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
        					/* TODO: possibly revisit */
        				}
        				if (response_length > sizeof(data))
        					response_length = 0;
        				if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
        					response_length = UGETW(req.u.ctrl.wLength);
        				if (response_data)
        					memcpy(data, response_data, response_length);
        				else
        					memset(data, 0, response_length);
        				if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
        					if (response_length > 0) {
        						vhci_response_t res;
        						res.size = response_length;
        						rv = vhci_usb_send(fd, &res, sizeof(res));
        						if (rv == 0)
        							rv = vhci_usb_send(fd, data, response_length);
        					}
        				} else {
        					rv = vhci_usb_recv(fd, data, response_length);
        				}
        				if (rv < 0) {
        					goto err;
        				}
        			}
        			sleep_ms(200);
        			return fd;
        		
        		err:
        			close(fd);
        			return -1;
        		}
        		
        		static volatile long syz_usb_connect(volatile long a0, volatile long a1,
        						     volatile long a2, volatile long a3)
        		{
        			uint64_t speed = a0;
        			uint64_t 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);
        		}
        		
        		static volatile long syz_usb_disconnect(volatile long a0)
        		{
        			int fd = a0;
        			int rv = close(fd);
        			sleep_ms(200);
        			return rv;
        		}
        		
        		static void sandbox_common()
        		{
        			if (setsid() == -1)
        			exit(1);
        			struct rlimit rlim;
        			rlim.rlim_cur = rlim.rlim_max = 8 << 20;
        			setrlimit(RLIMIT_MEMLOCK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_FSIZE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 1 << 20;
        			setrlimit(RLIMIT_STACK, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 0;
        			setrlimit(RLIMIT_CORE, &rlim);
        			rlim.rlim_cur = rlim.rlim_max = 256;
        			setrlimit(RLIMIT_NOFILE, &rlim);
        		}
        		
        		static void loop();
        		
        		static int do_sandbox_none(void)
        		{
        			sandbox_common();
        			loop();
        			return 0;
        		}
        		
        		static long syz_execute_func(volatile long text)
        		{
        			volatile long p[8] = {0};
        			(void)p;
        			asm volatile("" ::"r"(0l), "r"(1l), "r"(2l), "r"(3l), "r"(4l), "r"(5l), "r"(6l),
        				     "r"(7l), "r"(8l), "r"(9l), "r"(10l), "r"(11l), "r"(12l), "r"(13l));
        		((void (*)(void))(text))();
        			return 0;
        		}
        		
        		struct thread_t {
        			int created, call;
        			event_t ready, done;
        		};
        		
        		static struct thread_t threads[16];
        		static void execute_call(int call);
        		static int running;
        		
        		static void* thr(void* arg)
        		{
        			struct thread_t* th = (struct thread_t*)arg;
        			for (;;) {
        				event_wait(&th->ready);
        				event_reset(&th->ready);
        				execute_call(th->call);
        				__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        				event_set(&th->done);
        			}
        			return 0;
        		}
        		
        		static void execute_one(void)
        		{
        			fprintf(stderr, "### start\n");
        			int i, call, thread;
        			for (call = 0; call < 15; call++) {
        				for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
        					struct thread_t* th = &threads[thread];
        					if (!th->created) {
        						th->created = 1;
        						event_init(&th->ready);
        						event_init(&th->done);
        						event_set(&th->done);
        						thread_start(thr, th);
        					}
        					if (!event_isset(&th->done))
        						continue;
        					event_reset(&th->done);
        					th->call = call;
        					__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        					event_set(&th->ready);
        					event_timedwait(&th->done, 45 + (call == 13 ? 3000 : 0) + (call == 14 ? 300 : 0));
        					break;
        				}
        			}
        			for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        				sleep_ms(1);
        		}
        		
        		static void execute_one(void);
        		
        		#define WAIT_FLAGS 0
        		
        		static void loop(void)
        		{
        			int iter;
        			for (iter = 0;; iter++) {
        				char cwdbuf[32];
        				sprintf(cwdbuf, "./%d", iter);
        				if (mkdir(cwdbuf, 0777))
        			exit(1);
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					if (chdir(cwdbuf))
        			exit(1);
        					execute_one();
        					exit(0);
        				}
        				int status = 0;
        				uint64_t start = current_time_ms();
        				for (;;) {
        					if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        						break;
        					sleep_ms(1);
        					if (current_time_ms() - start < 5 * 1000)
        						continue;
        					kill_and_wait(pid, &status);
        					break;
        				}
        				remove_dir(cwdbuf);
        			}
        		}
        		
        		#ifndef SYS__lwp_wait
        		#define SYS__lwp_wait 312
        		#endif
        		#ifndef SYS_dup2
        		#define SYS_dup2 90
        		#endif
        		#ifndef SYS_getpeername
        		#define SYS_getpeername 31
        		#endif
        		#ifndef SYS_mkdirat
        		#define SYS_mkdirat 461
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_openat
        		#define SYS_openat 468
        		#endif
        		#ifndef SYS_pipe2
        		#define SYS_pipe2 453
        		#endif
        		#ifndef SYS_select
        		#define SYS_select 417
        		#endif
        		#ifndef SYS_sendto
        		#define SYS_sendto 133
        		#endif
        		#ifndef SYS_setitimer
        		#define SYS_setitimer 425
        		#endif
        		
        		uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS_pipe2, 0x20000000ul, 0x400000ul);
        				fprintf(stderr, "### call=0 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1) {
        		r[0] = *(uint32_t*)0x20000000;
        		r[1] = *(uint32_t*)0x20000004;
        				}
        				break;
        			case 1:
        		*(uint32_t*)0x20000080 = 0xc;
        				res = syscall(SYS_getpeername, r[0], 0x20000040ul, 0x20000080ul);
        				fprintf(stderr, "### call=1 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 2:
        		*(uint64_t*)0x200000c0 = 4;
        		*(uint64_t*)0x200000c8 = 0x10001;
        		*(uint64_t*)0x200000d0 = 0x80000001;
        		*(uint64_t*)0x200000d8 = 0xb66;
        		*(uint64_t*)0x200000e0 = 7;
        		*(uint64_t*)0x200000e8 = 0xd3d;
        		*(uint64_t*)0x200000f0 = 7;
        		*(uint64_t*)0x200000f8 = 5;
        		*(uint64_t*)0x20000100 = 0x200;
        		*(uint64_t*)0x20000108 = 0x4341;
        		*(uint64_t*)0x20000110 = 8;
        		*(uint64_t*)0x20000118 = 5;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0x3f2e;
        		*(uint64_t*)0x20000130 = 0xe2;
        		*(uint64_t*)0x20000138 = 2;
        		*(uint64_t*)0x20000140 = 1;
        		*(uint64_t*)0x20000148 = 0x441a;
        		*(uint64_t*)0x20000150 = 0xffffffff;
        		*(uint64_t*)0x20000158 = 5;
        		*(uint64_t*)0x20000160 = 0x2ff;
        		*(uint64_t*)0x20000168 = 0;
        		*(uint64_t*)0x20000170 = 0x7f;
        		*(uint64_t*)0x20000178 = 2;
        		*(uint64_t*)0x20000180 = 0x7fffffff;
        		*(uint64_t*)0x20000188 = 0x81;
        				res = syscall(SYS_select, 0x40ul, 0x200000c0ul, 0x20000100ul, 0x20000140ul, 0x20000180ul);
        				fprintf(stderr, "### call=2 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 3:
        				res = syscall(SYS_dup2, r[1], r[0]);
        				fprintf(stderr, "### call=3 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 4:
        		memcpy((void*)0x200001c0, "\x37\xbc\xac\xb5\x04\x3b\x86\x6b\xd3\xe2\x7b\xd0\x82\x22\x27\xf1\x31\x1d\x4c\xe1\x66\x9c\x91\xa1\xb9\x12\xb8", 27);
        		*(uint16_t*)0x20000200 = 2;
        		*(uint16_t*)0x20000202 = htobe16(0x4e23);
        		*(uint8_t*)0x20000204 = 0;
        		*(uint8_t*)0x20000205 = 0;
        		*(uint8_t*)0x20000206 = 0;
        		*(uint8_t*)0x20000207 = 0;
        		*(uint8_t*)0x20000208 = 0;
        		*(uint8_t*)0x20000209 = 0;
        		*(uint8_t*)0x2000020a = 0;
        		*(uint8_t*)0x2000020b = 0;
        				res = syscall(SYS_sendto, r[2], 0x200001c0ul, 0x1bul, 2ul, 0x20000200ul, 0xcul);
        				fprintf(stderr, "### call=4 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 5:
        		*(uint64_t*)0x20000240 = 8;
        		*(uint64_t*)0x20000248 = 0x100000000;
        		*(uint64_t*)0x20000250 = 2;
        		*(uint64_t*)0x20000258 = 4;
        				res = syscall(SYS_setitimer, 3ul, 0x20000240ul, 0x20000280ul);
        				fprintf(stderr, "### call=5 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 6:
        				res = syscall(SYS_pipe2, 0x200002c0ul, 4ul);
        				fprintf(stderr, "### call=6 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x200002c4;
        				break;
        			case 7:
        		memcpy((void*)0x20000300, "./file0\000", 8);
        				res = syscall(SYS_mkdirat, r[3], 0x20000300ul, 0x184ul);
        				fprintf(stderr, "### call=7 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 8:
        		memcpy((void*)0x20000340, "./file0\000", 8);
        				res = syscall(SYS_openat, 0xffffff9c, 0x20000340ul, 0x400000ul, 0x22cul);
        				fprintf(stderr, "### call=8 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 9:
        		*(uint32_t*)0x20000680 = 0;
        				res = syscall(SYS__lwp_wait, 0, 0x20000680ul);
        				fprintf(stderr, "### call=9 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\x8e\x73\x31\xa0\xf1\x3f\x62\xd1\xa7\x0e\xab\xdb\x36\x78\x15\xb2\x3f\xa6\x51\x74\xb2\xc5\xbf\x01\x25\x9f\xdc\xc5\xe2\x99\x0a\x84\xeb\x32\x4c\xd6\x08\xf0\x0f\xf1\x68\xb0\xd2\x5d\xc2\x18\xba\x1f\x0b\x8e\x2f\x28\x65\xc1\xee\xbf\x5b\x1f\x0b\x16\x30\xcf\x26\xd1\xf4\xcd\xb5\xc6\xe2\xfc\xa2\x4d\x81\xfe\x93\x52\xcc\xcd\xdd\x59\x8f\xfe\xe5\x5a\xae\x70\x0b\x07\x16\x1d\xe9\x5f\x24\xd8\x51\x29\xe1\xed\x38\x6a\xd0\x04\x1b\x40\x4b\x22\x6e\x4e\x1f\xaa\xd5\xe2\xb4\xbb\x4b\x11\xd2\x37\xd9\x5b\x62\x6b\x0b\xbd\xae\x9e\x29\x1e\x00\x8e\x78\xd6\x14\x2a\x4e\x51\x7b\x08\xfb\x6f\x12\x46\x61\xf7\xcb\xe5\x3d\x59\xe8\x9e\xb6\x77\x9e\xa0\x6d\x31\x2d\xca\xc9\x5a\x8f\x41\xa4\x64\x38\xfc\xcb\x2d\x05\x20\x61\x67\x9b\xc6\x12\x0d\x68\x8f\x0d\x01\xe8\x83\x25\x3f\x73\xb8\x3c\x4b\xfd\x87\xa1\x40\x19\xa2\x49\x38\xb3\x89\x92\x3a\x94\xd1", 202);
        				(void)res;
        				break;
        			case 11:
        		memcpy((void*)0x20000100, "\xf3\x90\x66\x0f\x38\xf8\x63\xfd\x66\x0f\xe2\xc6\x40\xdd\x16\xe6\x2a\x66\x41\x0f\x57\x36\xd9\xf8\xc4\x21\xf9\xd6\x62\x6d\xc4\xe3\x15\x0d\x33\xf3\xc4\xe3\x79\x1d\x5b\x54\x70", 43);
        				res = syz_execute_func(0x20000100);
        				fprintf(stderr, "### call=11 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 12:
        				(void)res;
        				break;
        			case 13:
        		memcpy((void*)0x20000180, "\x9c\xaf\x95\xde\x70\x3c\x58\x2f\x66\x0a\x94\xf3\x86\x33\x40\x4b\xfb\xf0\x7b\x40\x10\xc7\x47\x82\xb2\x5a\xa5\x88\x4a\x09\x66\x15\x16\x18\x36\x7c\xb3\x49\xd5\x2e\x5d\xb4\xb8\x81\x93\x9f\x71\x0a\x7f\x9a\x47\x98\x31\x36\x51\x0e\x47\x57\xa5\xca\x08\x6a\x59\x2c\xae\xf8\xd4\x29\xf2\xb7\xda\xc6\xc3\xba\x21\x8b\xc8\x43\x6b\x8a\x25\xeb\xc7\xda\x20\x3f\x4b\x54\x73\x90\x24\xe0\xca\xed\x49\x40\x3e\xfb\x3b\xf6\x15\x83\x10\xc2\xb3\x83\x26\x7d\x12\x8c\xd8\x60\x5b\x74\x38\x37\xc9\xda\xed\xee\x86\xb2\x2d", 123);
        		memcpy((void*)0x20000200, "\x05\x89\x82\x10\xb3\x35\x10\xfd\xb8\x96\x7d\x5d\x72\x13\xfa\x29\xa3\xd2\xa6\x28\x1b\x62\xa9\xf7\xeb\xfe\xd2\x7b\xb9\xbc\xb1\x55\x04\x75\xa4\xcc\xce\xf2\x8e\x24\x62\x37\x38\xb8\x89\xf7\x4e\x1a\xdd\xba\xb8\xbf\xed\xd6\x7f\x11\x03\xc6\x3a\x13\x46\x33\xa2\x56\x39\x72\x82\xab\xc4\x0d\x61\x4c\xf0\x05\x33\x62\xba\x35\xf7\x2d\x01\x05\xfa\x66\xef\xb6\xaf\xde\xcd\x5e\x88\x48\x13\xfa\xfb\x2c\x07\x78\xea\x87\xaf\x07\x94\xe2\xf4\xb6\xf4\x9f\x46\x4f\x2f\xea\xdf\xb1\x10\xfc\x25\x87\xdb\x62\x81\x8d\x5b\x95\x19\x76\x77\x5a\x95\x64\x9d\x07\x3e\x82\xe7\x33\xe0\xdf\x98\x89\x13\xe4\xb3\xb9\x85\x1d\x2f\xa7\x71\x72\x6a\x9c\xc6\x03\xc7\xf7\xbd\xe4\x0e\x68", 160);
        				res = syz_usb_connect(3, 0x7b, 0x20000180, 0x20000200);
        				fprintf(stderr, "### call=13 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 14:
        				res = syz_usb_disconnect(r[4]);
        				fprintf(stderr, "### call=14 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					use_temporary_dir();
        					do_sandbox_none();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:637:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:642:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor307117422 -DGOOS_netbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_linux=1 -x c - -m64 --sysroot /syzkaller/netbsd/src/../dest/ -O2 -pthread -Wall -Werror -Wparentheses -Wframe-larger-than=16384]
        --- FAIL: TestGenerate/netbsd/amd64/9 (0.15s)
        	csource_test.go:121: 
        --- FAIL: TestGenerate/netbsd/amd64/10 (0.18s)
        	csource_test.go:121: 
FAIL
FAIL	github.com/google/syzkaller/pkg/csource	2.739s
ok  	github.com/google/syzkaller/pkg/db	(cached)
ok  	github.com/google/syzkaller/pkg/email	(cached)
?   	github.com/google/syzkaller/pkg/gce	[no test files]
?   	github.com/google/syzkaller/pkg/gcs	[no test files]
?   	github.com/google/syzkaller/pkg/hash	[no test files]
ok  	github.com/google/syzkaller/pkg/host	(cached)
?   	github.com/google/syzkaller/pkg/html	[no test files]
ok  	github.com/google/syzkaller/pkg/ifuzz	(cached)
?   	github.com/google/syzkaller/pkg/ifuzz/gen	[no test files]
?   	github.com/google/syzkaller/pkg/ifuzz/generated	[no test files]
ok  	github.com/google/syzkaller/pkg/instance	(cached)
ok  	github.com/google/syzkaller/pkg/ipc	(cached)
?   	github.com/google/syzkaller/pkg/ipc/ipcconfig	[no test files]
ok  	github.com/google/syzkaller/pkg/kd	(cached)
ok  	github.com/google/syzkaller/pkg/log	(cached)
ok  	github.com/google/syzkaller/pkg/mgrconfig	(cached)
ok  	github.com/google/syzkaller/pkg/osutil	(cached)
ok  	github.com/google/syzkaller/pkg/report	(cached)
ok  	github.com/google/syzkaller/pkg/repro	(cached)
?   	github.com/google/syzkaller/pkg/rpctype	[no test files]
ok  	github.com/google/syzkaller/pkg/runtest	(cached)
ok  	github.com/google/syzkaller/pkg/serializer	(cached)
?   	github.com/google/syzkaller/pkg/signal	[no test files]
ok  	github.com/google/syzkaller/pkg/symbolizer	(cached)
ok  	github.com/google/syzkaller/pkg/vcs	(cached)
ok  	github.com/google/syzkaller/prog	(cached)
ok  	github.com/google/syzkaller/prog/test	(cached)
?   	github.com/google/syzkaller/sys	[no test files]
?   	github.com/google/syzkaller/sys/akaros	[no test files]
?   	github.com/google/syzkaller/sys/akaros/gen	[no test files]
?   	github.com/google/syzkaller/sys/freebsd	[no test files]
?   	github.com/google/syzkaller/sys/freebsd/gen	[no test files]
?   	github.com/google/syzkaller/sys/fuchsia	[no test files]
?   	github.com/google/syzkaller/sys/fuchsia/fidlgen	[no test files]
?   	github.com/google/syzkaller/sys/fuchsia/gen	[no test files]
?   	github.com/google/syzkaller/sys/fuchsia/layout	[no test files]
ok  	github.com/google/syzkaller/sys/linux	(cached)
?   	github.com/google/syzkaller/sys/linux/gen	[no test files]
?   	github.com/google/syzkaller/sys/netbsd	[no test files]
?   	github.com/google/syzkaller/sys/netbsd/gen	[no test files]
ok  	github.com/google/syzkaller/sys/openbsd	(cached)
?   	github.com/google/syzkaller/sys/openbsd/gen	[no test files]
?   	github.com/google/syzkaller/sys/syz-extract	[no test files]
?   	github.com/google/syzkaller/sys/syz-sysgen	[no test files]
?   	github.com/google/syzkaller/sys/targets	[no test files]
?   	github.com/google/syzkaller/sys/test	[no test files]
?   	github.com/google/syzkaller/sys/test/gen	[no test files]
?   	github.com/google/syzkaller/sys/trusty	[no test files]
?   	github.com/google/syzkaller/sys/trusty/gen	[no test files]
?   	github.com/google/syzkaller/sys/windows	[no test files]
?   	github.com/google/syzkaller/sys/windows/gen	[no test files]
ok  	github.com/google/syzkaller/syz-ci	(cached)
ok  	github.com/google/syzkaller/syz-fuzzer	(cached)
ok  	github.com/google/syzkaller/syz-hub	(cached)
ok  	github.com/google/syzkaller/syz-hub/state	(cached)
?   	github.com/google/syzkaller/syz-manager	[no test files]
?   	github.com/google/syzkaller/tools/syz-benchcmp	[no test files]
?   	github.com/google/syzkaller/tools/syz-bisect	[no test files]
?   	github.com/google/syzkaller/tools/syz-check	[no test files]
?   	github.com/google/syzkaller/tools/syz-cover	[no test files]
?   	github.com/google/syzkaller/tools/syz-crush	[no test files]
?   	github.com/google/syzkaller/tools/syz-db	[no test files]
?   	github.com/google/syzkaller/tools/syz-execprog	[no test files]
?   	github.com/google/syzkaller/tools/syz-expand	[no test files]
?   	github.com/google/syzkaller/tools/syz-fmt	[no test files]
?   	github.com/google/syzkaller/tools/syz-imagegen	[no test files]
?   	github.com/google/syzkaller/tools/syz-make	[no test files]
?   	github.com/google/syzkaller/tools/syz-mutate	[no test files]
?   	github.com/google/syzkaller/tools/syz-prog2c	[no test files]
?   	github.com/google/syzkaller/tools/syz-repro	[no test files]
?   	github.com/google/syzkaller/tools/syz-reprolist	[no test files]
?   	github.com/google/syzkaller/tools/syz-runtest	[no test files]
?   	github.com/google/syzkaller/tools/syz-showprio	[no test files]
?   	github.com/google/syzkaller/tools/syz-stress	[no test files]
?   	github.com/google/syzkaller/tools/syz-symbolize	[no test files]
?   	github.com/google/syzkaller/tools/syz-testbuild	[no test files]
?   	github.com/google/syzkaller/tools/syz-trace2syz	[no test files]
ok  	github.com/google/syzkaller/tools/syz-trace2syz/parser	(cached)
ok  	github.com/google/syzkaller/tools/syz-trace2syz/proggen	(cached)
?   	github.com/google/syzkaller/tools/syz-tty	[no test files]
?   	github.com/google/syzkaller/tools/syz-upgrade	[no test files]
?   	github.com/google/syzkaller/tools/syz-usbgen	[no test files]
ok  	github.com/google/syzkaller/vm	(cached)
?   	github.com/google/syzkaller/vm/adb	[no test files]
?   	github.com/google/syzkaller/vm/bhyve	[no test files]
?   	github.com/google/syzkaller/vm/gce	[no test files]
?   	github.com/google/syzkaller/vm/gvisor	[no test files]
ok  	github.com/google/syzkaller/vm/isolated	(cached)
?   	github.com/google/syzkaller/vm/kvm	[no test files]
?   	github.com/google/syzkaller/vm/odroid	[no test files]
?   	github.com/google/syzkaller/vm/qemu	[no test files]
ok  	github.com/google/syzkaller/vm/vmimpl	(cached)
?   	github.com/google/syzkaller/vm/vmm	[no test files]