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 (1.39s)
    --- FAIL: TestGenerate/netbsd/amd64 (0.04s)
    	csource_test.go:67: seed=1590078626916916782
        --- FAIL: TestGenerate/netbsd/amd64/0 (0.40s)
        	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:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_one(void)
        		{
        				intptr_t res = 0;
        			res = syscall(SYS__lwp_self);
        			if (res != -1)
        				r[0] = res;
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        			res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        			if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        			res = syscall(SYS__lwp_self);
        			if (res != -1)
        				r[2] = res;
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        			res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        			if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        			res = syscall(SYS__lwp_self);
        			if (res != -1)
        				r[4] = res;
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        			syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        			res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        			if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        			syscall(SYS__lwp_kill, r[5], 8);
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        			syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        			syscall(SYS_shmctl, 0, 3ul, 0);
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        			syz_execute_func(0x20000080);
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        			res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        			if (res != -1)
        				r[6] = res;
        			syz_usb_disconnect(r[6]);
        		
        		}
        		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-executor727192031 -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/amd64/10 (0.40s)
        	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:false HandleSegv:false Repro:false Trace:false}
        		program:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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 <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/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 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++) {
        				int pid = fork();
        				if (pid < 0)
        			exit(1);
        				if (pid == 0) {
        					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;
        				}
        			}
        		}
        		
        		#ifndef SYS__lwp_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				syscall(SYS__lwp_kill, r[5], 8);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				break;
        			case 9:
        				syscall(SYS_shmctl, 0, 3ul, 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				syz_execute_func(0x20000080);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[6]);
        				break;
        			}
        		
        		}
        		int main(void)
        		{
        				syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
        					do_sandbox_none();
        			return 0;
        		}
        		
        		<stdin>: In function 'syz_usb_connect_impl':
        		<stdin>:596:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:601:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor005609906 -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/amd64/12 (0.40s)
        	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:true Trace:false}
        		program:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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;
        			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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				syscall(SYS__lwp_kill, r[5], 8);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				break;
        			case 9:
        				syscall(SYS_shmctl, 0, 3ul, 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				syz_execute_func(0x20000080);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[6]);
        				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-executor137909888 -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/amd64/14 (0.41s)
        	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:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				syscall(SYS__lwp_kill, r[5], 8);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				break;
        			case 9:
        				syscall(SYS_shmctl, 0, 3ul, 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				syz_execute_func(0x20000080);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[6]);
        				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-executor792321897 -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 (0.42s)
        	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:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				syscall(SYS__lwp_kill, r[5], 8);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				break;
        			case 9:
        				syscall(SYS_shmctl, 0, 3ul, 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				syz_execute_func(0x20000080);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[6]);
        				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-executor565828532 -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 (0.42s)
        	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:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				fprintf(stderr, "### call=0 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				fprintf(stderr, "### call=1 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				fprintf(stderr, "### call=2 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				fprintf(stderr, "### call=3 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				fprintf(stderr, "### call=4 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				res = syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				fprintf(stderr, "### call=5 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				fprintf(stderr, "### call=6 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				res = syscall(SYS__lwp_kill, r[5], 8);
        				fprintf(stderr, "### call=7 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				res = syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				fprintf(stderr, "### call=8 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 9:
        				res = syscall(SYS_shmctl, 0, 3ul, 0);
        				fprintf(stderr, "### call=9 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				(void)res;
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				res = syz_execute_func(0x20000080);
        				fprintf(stderr, "### call=11 errno=%u\n", res == -1 ? errno : 0);
        				break;
        			case 12:
        				(void)res;
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				fprintf(stderr, "### call=13 errno=%u\n", res == -1 ? errno : 0);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				res = syz_usb_disconnect(r[6]);
        				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-executor797226883 -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 (0.19s)
        	csource_test.go:121: 
        --- FAIL: TestGenerate/netbsd/amd64/7 (0.21s)
        	csource_test.go:121: 
        --- FAIL: TestGenerate/netbsd/amd64/11 (0.21s)
        	csource_test.go:121: 
        --- FAIL: TestGenerate/netbsd/amd64/9 (0.20s)
        	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:true 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:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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 <net/ethertypes.h>
        		#include <net/if.h>
        		#include <net/if_arp.h>
        		#include <net/if_tun.h>
        		#include <netinet/in.h>
        		#include <netinet/ip.h>
        		#include <netinet/ip6.h>
        		#include <netinet/tcp.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/uio.h>
        		#include <sys/wait.h>
        		#include <time.h>
        		#include <unistd.h>
        		
        		#include <netinet/if_ether.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 int tunfd = -1;
        		
        		#define MAX_TUN 64
        		
        		#define TUN_IFACE "tap%d"
        		#define TUN_DEVICE "/dev/tap%d"
        		
        		#define LOCAL_MAC "aa:aa:aa:aa:aa:aa"
        		#define REMOTE_MAC "aa:aa:aa:aa:aa:bb"
        		#define LOCAL_IPV4 "172.20.%d.170"
        		#define REMOTE_IPV4 "172.20.%d.187"
        		#define LOCAL_IPV6 "fe80::%02hxaa"
        		#define REMOTE_IPV6 "fe80::%02hxbb"
        		
        		static void vsnprintf_check(char* str, size_t size, const char* format, va_list args)
        		{
        			int rv;
        			rv = vsnprintf(str, size, format, args);
        			if (rv < 0)
        			exit(1);
        			if ((size_t)rv >= size)
        			exit(1);
        		}
        		
        		static void snprintf_check(char* str, size_t size, const char* format, ...)
        		{
        			va_list args;
        			va_start(args, format);
        			vsnprintf_check(str, size, format, args);
        			va_end(args);
        		}
        		
        		#define COMMAND_MAX_LEN 128
        		#define PATH_PREFIX "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin "
        		#define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1)
        		
        		static void execute_command(bool panic, const char* format, ...)
        		{
        			va_list args;
        			char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN];
        			int rv;
        			va_start(args, format);
        			memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN);
        			vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args);
        			va_end(args);
        			rv = system(command);
        			if (rv) {
        				if (panic)
        			exit(1);
        			}
        		}
        		
        		static void initialize_tun(int tun_id)
        		{
        			if (tun_id < 0 || tun_id >= MAX_TUN) {
        			exit(1);
        			}
        			char tun_device[sizeof(TUN_DEVICE)];
        			snprintf_check(tun_device, sizeof(tun_device), TUN_DEVICE, tun_id);
        			char tun_iface[sizeof(TUN_IFACE)];
        			snprintf_check(tun_iface, sizeof(tun_iface), TUN_IFACE, tun_id);
        			execute_command(0, "ifconfig %s destroy", tun_iface);
        			execute_command(0, "ifconfig %s create", tun_iface);
        			tunfd = open(tun_device, O_RDWR | O_NONBLOCK);
        			if (tunfd == -1) {
        				printf("tun: can't open %s: errno=%d\n", tun_device, errno);
        				return;
        			}
        			const int kTunFd = 240;
        			if (dup2(tunfd, kTunFd) < 0)
        			exit(1);
        			close(tunfd);
        			tunfd = kTunFd;
        			char local_mac[sizeof(LOCAL_MAC)];
        			snprintf_check(local_mac, sizeof(local_mac), LOCAL_MAC);
        			execute_command(1, "ifconfig %s link %s", tun_iface, local_mac);
        			char local_ipv4[sizeof(LOCAL_IPV4)];
        			snprintf_check(local_ipv4, sizeof(local_ipv4), LOCAL_IPV4, tun_id);
        			execute_command(1, "ifconfig %s inet %s netmask 255.255.255.0", tun_iface, local_ipv4);
        			char remote_mac[sizeof(REMOTE_MAC)];
        			char remote_ipv4[sizeof(REMOTE_IPV4)];
        			snprintf_check(remote_mac, sizeof(remote_mac), REMOTE_MAC);
        			snprintf_check(remote_ipv4, sizeof(remote_ipv4), REMOTE_IPV4, tun_id);
        			execute_command(0, "arp -s %s %s", remote_ipv4, remote_mac);
        			char local_ipv6[sizeof(LOCAL_IPV6)];
        			snprintf_check(local_ipv6, sizeof(local_ipv6), LOCAL_IPV6, tun_id);
        			execute_command(1, "ifconfig %s inet6 %s", tun_iface, local_ipv6);
        			char remote_ipv6[sizeof(REMOTE_IPV6)];
        			snprintf_check(remote_ipv6, sizeof(remote_ipv6), REMOTE_IPV6, tun_id);
        			execute_command(0, "ndp -s %s%%%s %s", remote_ipv6, tun_iface, remote_mac);
        		}
        		
        		static long syz_emit_ethernet(volatile long a0, volatile long a1)
        		{
        			if (tunfd < 0)
        				return (uintptr_t)-1;
        			size_t length = a0;
        			const char* data = (char*)a1;
        			return write(tunfd, data, length);
        		}
        		
        		static int read_tun(char* data, int size)
        		{
        			if (tunfd < 0)
        				return -1;
        			int rv = read(tunfd, data, size);
        			if (rv < 0) {
        				if (errno == EAGAIN)
        					return -1;
        			exit(1);
        			}
        			return rv;
        		}
        		
        		struct tcp_resources {
        			uint32_t seq;
        			uint32_t ack;
        		};
        		
        		static long syz_extract_tcp_res(volatile long a0, volatile long a1, volatile long a2)
        		{
        			if (tunfd < 0)
        				return (uintptr_t)-1;
        			char data[1000];
        			int rv = read_tun(&data[0], sizeof(data));
        			if (rv == -1)
        				return (uintptr_t)-1;
        			size_t length = rv;
        			struct tcphdr* tcphdr;
        			if (length < sizeof(struct ether_header))
        				return (uintptr_t)-1;
        			struct ether_header* ethhdr = (struct ether_header*)&data[0];
        			if (ethhdr->ether_type == htons(ETHERTYPE_IP)) {
        				if (length < sizeof(struct ether_header) + sizeof(struct ip))
        					return (uintptr_t)-1;
        				struct ip* iphdr = (struct ip*)&data[sizeof(struct ether_header)];
        				if (iphdr->ip_p != IPPROTO_TCP)
        					return (uintptr_t)-1;
        				if (length < sizeof(struct ether_header) + iphdr->ip_hl * 4 + sizeof(struct tcphdr))
        					return (uintptr_t)-1;
        				tcphdr = (struct tcphdr*)&data[sizeof(struct ether_header) + iphdr->ip_hl * 4];
        			} else {
        				if (length < sizeof(struct ether_header) + sizeof(struct ip6_hdr))
        					return (uintptr_t)-1;
        				struct ip6_hdr* ipv6hdr = (struct ip6_hdr*)&data[sizeof(struct ether_header)];
        				if (ipv6hdr->ip6_nxt != IPPROTO_TCP)
        					return (uintptr_t)-1;
        				if (length < sizeof(struct ether_header) + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))
        					return (uintptr_t)-1;
        				tcphdr = (struct tcphdr*)&data[sizeof(struct ether_header) + sizeof(struct ip6_hdr)];
        			}
        			struct tcp_resources* res = (struct tcp_resources*)a0;
        		res->seq = htonl((ntohl(tcphdr->th_seq) + (uint32_t)a1));
        		res->ack = htonl((ntohl(tcphdr->th_ack) + (uint32_t)a2));
        			return 0;
        		}
        		
        		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();
        			initialize_tun(procid);
        			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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				syscall(SYS__lwp_kill, r[5], 8);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				break;
        			case 9:
        				syscall(SYS_shmctl, 0, 3ul, 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				syz_emit_ethernet(0x54, 0x20000000);
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				syz_execute_func(0x20000080);
        				break;
        			case 12:
        				syz_extract_tcp_res(0x200000c0, 3, 0xc5d);
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[6]);
        				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>:648:63: error: unknown type name 'usb_ctrlrequest'
        		<stdin>:653:55: error: unknown type name 'usb_ctrlrequest'
        		
        		compiler invocation: /syzkaller/netbsd/src/../tools/bin/x86_64--netbsd-g++ [-o /tmp/syz-executor776363484 -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 (0.26s)
        	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:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				syscall(SYS__lwp_kill, r[5], 8);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				break;
        			case 9:
        				syscall(SYS_shmctl, 0, 3ul, 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				syz_execute_func(0x20000080);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[6]);
        				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-executor139321094 -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 (0.21s)
        	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:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				syscall(SYS__lwp_kill, r[5], 8);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				break;
        			case 9:
        				syscall(SYS_shmctl, 0, 3ul, 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				syz_execute_func(0x20000080);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[6]);
        				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-executor261432730 -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 (0.21s)
        	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:
        		r0 = _lwp_self()
        		_lwp_create(&(0x7f0000000100)={0x400f0020, &(0x7f0000000080)={0x0, &(0x7f0000000000)={0x400f0023, 0x0, {[0x7, 0x7, 0x101, 0x1f]}, {0x1, 0x400, 0x6}, {0x1, 0x80000000, '\x00'}}, {[0x3, 0x5, 0x1, 0x35f7192e]}, {0xd, 0x100000000, 0x5}, {0x6, 0x10001, '\x00'}}, {[0xf1b, 0x401, 0x69, 0x100]}, {0x1, 0x0, 0x16ac7582ecd3534}, {0x1, 0x400, '-\x00'}}, 0x60, &(0x7f0000000180)=<r1=>0x0)
        		r2 = _lwp_self()
        		_lwp_create(&(0x7f00000001c0)={0x2, 0x0, {[0x9, 0x3ae, 0x3, 0xc699]}, {0x81, 0x2, 0x1}, {0x9, 0x7, '\x00'}}, 0x40, &(0x7f0000000240)=<r3=>0x0)
        		r4 = _lwp_self()
        		_lwp_unpark_all(&(0x7f0000000280)=[r0, r1, r2, r3, r4], 0x5, &(0x7f00000002c0)=0x4)
        		_lwp_create(&(0x7f0000000380)={0x8, &(0x7f0000000300)={0x400f002c, 0x0, {[0x80000000, 0xa706, 0x0, 0x8]}, {0x1f, 0x6, 0x1}, {0x101, 0x5, '\x00'}}, {[0x2, 0x9, 0x10000, 0x1]}, {0x2, 0xffffffff, 0x5}, {0x20, 0xfff, '\x00'}}, 0x40, &(0x7f0000000400)=<r5=>0x0)
        		_lwp_kill(r5, 0x8)
        		compat_50__lwp_park(&(0x7f0000000440)={0x101, 0x8}, 0x0, 0x0, &(0x7f0000000480)=0x1)
        		shmctl$SHM_LOCK(0x0, 0x3)
        		syz_emit_ethernet(0x54, &(0x7f0000000000)="afe8d2383c3ef2ff5f6e8c9a4d35c602198766ff84e3acfd84f778353f61842e8a198d7e500cce4b813690338589cca07acde0e9834fd09b00f3146ba0ddb9ac17ae011fb861af258325476c9621388eca4b11c0")
        		syz_execute_func(&(0x7f0000000080)="3642833dd70b586a463e640febb19b000000c4c3f97c6d4ca6f344a6c443857fc618fdc403116f26fa447ba9642e470f12fc64f20f116200")
        		syz_extract_tcp_res(&(0x7f00000000c0), 0x3, 0xc5d)
        		r6 = syz_usb_connect(0xfffffffffffffeff, 0x78, &(0x7f0000000100)="935e057aa8ddaece20394d86c45c4a50f7278a8791b0cdbcf6e832b9052f3ab99063705506c66eb3374aad5e1fded7515c8cb7fe2c216994ffb89e915496a207404168e86ba82f7c0d4964e7e756ac689919cf9f4bf87d3e3b5174605c8f256d28204e428bf295ff312e2e27a1c2afb893dbe7867060c650", &(0x7f0000000180)="2b06574b32d8eb1d7479431c2ab53fc2d24cbf1c4368a824c8cd8217f44d51b11889f929d65e7900cccb5166453ffe7fa1f328df9695a4457b58f13191e90ca794186e763217e923bdc4f20434eba96616cc3b27ea87d54a6c434d77b737d18d0d8d537dce330d2759be67e22e1dc617f517147faeb44e343d630b33d1d31606b2a3971efcd03e4d87b5e600323723abfef81aa71bea16bdf9561aca75ce3265de3ac8a1590a61ede73a7b6943ddf3e3fcf19e478f55859db78d6baa46b7a7e2159f6f4f20ccb18d5c41fb430249")
        		syz_usb_disconnect(r6)
        		
        	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_create
        		#define SYS__lwp_create 309
        		#endif
        		#ifndef SYS__lwp_kill
        		#define SYS__lwp_kill 318
        		#endif
        		#ifndef SYS__lwp_self
        		#define SYS__lwp_self 311
        		#endif
        		#ifndef SYS__lwp_unpark_all
        		#define SYS__lwp_unpark_all 322
        		#endif
        		#ifndef SYS_compat_50__lwp_park
        		#define SYS_compat_50__lwp_park 320
        		#endif
        		#ifndef SYS_mmap
        		#define SYS_mmap 197
        		#endif
        		#ifndef SYS_shmctl
        		#define SYS_shmctl 443
        		#endif
        		
        		uint64_t r[7] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff};
        		
        		void execute_call(int call)
        		{
        				intptr_t res = 0;
        			switch (call) {
        			case 0:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[0] = res;
        				break;
        			case 1:
        		*(uint32_t*)0x20000100 = 0x400f0020;
        		*(uint64_t*)0x20000108 = 0x20000080;
        		*(uint32_t*)0x20000080 = 0;
        		*(uint64_t*)0x20000088 = 0x20000000;
        		*(uint32_t*)0x20000000 = 0x400f0023;
        		*(uint64_t*)0x20000008 = 0;
        		*(uint32_t*)0x20000010 = 7;
        		*(uint32_t*)0x20000014 = 7;
        		*(uint32_t*)0x20000018 = 0x101;
        		*(uint32_t*)0x2000001c = 0x1f;
        		*(uint64_t*)0x20000020 = 1;
        		*(uint64_t*)0x20000028 = 0x400;
        		*(uint32_t*)0x20000030 = 6;
        		*(uint64_t*)0x20000038 = 1;
        		*(uint64_t*)0x20000040 = 0x80000000;
        		memcpy((void*)0x20000048, "\000", 1);
        		*(uint32_t*)0x20000090 = 3;
        		*(uint32_t*)0x20000094 = 5;
        		*(uint32_t*)0x20000098 = 1;
        		*(uint32_t*)0x2000009c = 0x35f7192e;
        		*(uint64_t*)0x200000a0 = 0xd;
        		*(uint64_t*)0x200000a8 = 0x100000000;
        		*(uint32_t*)0x200000b0 = 5;
        		*(uint64_t*)0x200000b8 = 6;
        		*(uint64_t*)0x200000c0 = 0x10001;
        		memcpy((void*)0x200000c8, "\000", 1);
        		*(uint32_t*)0x20000110 = 0xf1b;
        		*(uint32_t*)0x20000114 = 0x401;
        		*(uint32_t*)0x20000118 = 0x69;
        		*(uint32_t*)0x2000011c = 0x100;
        		*(uint64_t*)0x20000120 = 1;
        		*(uint64_t*)0x20000128 = 0;
        		*(uint32_t*)0x20000130 = 0x2ecd3534;
        		*(uint64_t*)0x20000138 = 1;
        		*(uint64_t*)0x20000140 = 0x400;
        		memcpy((void*)0x20000148, "-\000", 2);
        				res = syscall(SYS__lwp_create, 0x20000100ul, 0x60ul, 0x20000180ul);
        				if (res != -1)
        		r[1] = *(uint32_t*)0x20000180;
        				break;
        			case 2:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[2] = res;
        				break;
        			case 3:
        		*(uint32_t*)0x200001c0 = 2;
        		*(uint64_t*)0x200001c8 = 0;
        		*(uint32_t*)0x200001d0 = 9;
        		*(uint32_t*)0x200001d4 = 0x3ae;
        		*(uint32_t*)0x200001d8 = 3;
        		*(uint32_t*)0x200001dc = 0xc699;
        		*(uint64_t*)0x200001e0 = 0x81;
        		*(uint64_t*)0x200001e8 = 2;
        		*(uint32_t*)0x200001f0 = 1;
        		*(uint64_t*)0x200001f8 = 9;
        		*(uint64_t*)0x20000200 = 7;
        		memcpy((void*)0x20000208, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x200001c0ul, 0x40ul, 0x20000240ul);
        				if (res != -1)
        		r[3] = *(uint32_t*)0x20000240;
        				break;
        			case 4:
        				res = syscall(SYS__lwp_self);
        				if (res != -1)
        						r[4] = res;
        				break;
        			case 5:
        		*(uint32_t*)0x20000280 = r[0];
        		*(uint32_t*)0x20000284 = r[1];
        		*(uint32_t*)0x20000288 = r[2];
        		*(uint32_t*)0x2000028c = r[3];
        		*(uint32_t*)0x20000290 = r[4];
        		*(uint64_t*)0x200002c0 = 4;
        				syscall(SYS__lwp_unpark_all, 0x20000280ul, 5ul, 0x200002c0ul);
        				break;
        			case 6:
        		*(uint32_t*)0x20000380 = 8;
        		*(uint64_t*)0x20000388 = 0x20000300;
        		*(uint32_t*)0x20000300 = 0x400f002c;
        		*(uint64_t*)0x20000308 = 0;
        		*(uint32_t*)0x20000310 = 0x80000000;
        		*(uint32_t*)0x20000314 = 0xa706;
        		*(uint32_t*)0x20000318 = 0;
        		*(uint32_t*)0x2000031c = 8;
        		*(uint64_t*)0x20000320 = 0x1f;
        		*(uint64_t*)0x20000328 = 6;
        		*(uint32_t*)0x20000330 = 1;
        		*(uint64_t*)0x20000338 = 0x101;
        		*(uint64_t*)0x20000340 = 5;
        		memcpy((void*)0x20000348, "\000", 1);
        		*(uint32_t*)0x20000390 = 2;
        		*(uint32_t*)0x20000394 = 9;
        		*(uint32_t*)0x20000398 = 0x10000;
        		*(uint32_t*)0x2000039c = 1;
        		*(uint64_t*)0x200003a0 = 2;
        		*(uint64_t*)0x200003a8 = 0xffffffff;
        		*(uint32_t*)0x200003b0 = 5;
        		*(uint64_t*)0x200003b8 = 0x20;
        		*(uint64_t*)0x200003c0 = 0xfff;
        		memcpy((void*)0x200003c8, "\000", 1);
        				res = syscall(SYS__lwp_create, 0x20000380ul, 0x40ul, 0x20000400ul);
        				if (res != -1)
        		r[5] = *(uint32_t*)0x20000400;
        				break;
        			case 7:
        				syscall(SYS__lwp_kill, r[5], 8);
        				break;
        			case 8:
        		*(uint32_t*)0x20000440 = 0x101;
        		*(uint64_t*)0x20000448 = 8;
        		*(uint64_t*)0x20000480 = 1;
        				syscall(SYS_compat_50__lwp_park, 0x20000440ul, 0, 0ul, 0x20000480ul);
        				break;
        			case 9:
        				syscall(SYS_shmctl, 0, 3ul, 0);
        				break;
        			case 10:
        		memcpy((void*)0x20000000, "\xaf\xe8\xd2\x38\x3c\x3e\xf2\xff\x5f\x6e\x8c\x9a\x4d\x35\xc6\x02\x19\x87\x66\xff\x84\xe3\xac\xfd\x84\xf7\x78\x35\x3f\x61\x84\x2e\x8a\x19\x8d\x7e\x50\x0c\xce\x4b\x81\x36\x90\x33\x85\x89\xcc\xa0\x7a\xcd\xe0\xe9\x83\x4f\xd0\x9b\x00\xf3\x14\x6b\xa0\xdd\xb9\xac\x17\xae\x01\x1f\xb8\x61\xaf\x25\x83\x25\x47\x6c\x96\x21\x38\x8e\xca\x4b\x11\xc0", 84);
        				break;
        			case 11:
        		memcpy((void*)0x20000080, "\x36\x42\x83\x3d\xd7\x0b\x58\x6a\x46\x3e\x64\x0f\xeb\xb1\x9b\x00\x00\x00\xc4\xc3\xf9\x7c\x6d\x4c\xa6\xf3\x44\xa6\xc4\x43\x85\x7f\xc6\x18\xfd\xc4\x03\x11\x6f\x26\xfa\x44\x7b\xa9\x64\x2e\x47\x0f\x12\xfc\x64\xf2\x0f\x11\x62\x00", 56);
        				syz_execute_func(0x20000080);
        				break;
        			case 12:
        				break;
        			case 13:
        		memcpy((void*)0x20000100, "\x93\x5e\x05\x7a\xa8\xdd\xae\xce\x20\x39\x4d\x86\xc4\x5c\x4a\x50\xf7\x27\x8a\x87\x91\xb0\xcd\xbc\xf6\xe8\x32\xb9\x05\x2f\x3a\xb9\x90\x63\x70\x55\x06\xc6\x6e\xb3\x37\x4a\xad\x5e\x1f\xde\xd7\x51\x5c\x8c\xb7\xfe\x2c\x21\x69\x94\xff\xb8\x9e\x91\x54\x96\xa2\x07\x40\x41\x68\xe8\x6b\xa8\x2f\x7c\x0d\x49\x64\xe7\xe7\x56\xac\x68\x99\x19\xcf\x9f\x4b\xf8\x7d\x3e\x3b\x51\x74\x60\x5c\x8f\x25\x6d\x28\x20\x4e\x42\x8b\xf2\x95\xff\x31\x2e\x2e\x27\xa1\xc2\xaf\xb8\x93\xdb\xe7\x86\x70\x60\xc6\x50", 120);
        		memcpy((void*)0x20000180, "\x2b\x06\x57\x4b\x32\xd8\xeb\x1d\x74\x79\x43\x1c\x2a\xb5\x3f\xc2\xd2\x4c\xbf\x1c\x43\x68\xa8\x24\xc8\xcd\x82\x17\xf4\x4d\x51\xb1\x18\x89\xf9\x29\xd6\x5e\x79\x00\xcc\xcb\x51\x66\x45\x3f\xfe\x7f\xa1\xf3\x28\xdf\x96\x95\xa4\x45\x7b\x58\xf1\x31\x91\xe9\x0c\xa7\x94\x18\x6e\x76\x32\x17\xe9\x23\xbd\xc4\xf2\x04\x34\xeb\xa9\x66\x16\xcc\x3b\x27\xea\x87\xd5\x4a\x6c\x43\x4d\x77\xb7\x37\xd1\x8d\x0d\x8d\x53\x7d\xce\x33\x0d\x27\x59\xbe\x67\xe2\x2e\x1d\xc6\x17\xf5\x17\x14\x7f\xae\xb4\x4e\x34\x3d\x63\x0b\x33\xd1\xd3\x16\x06\xb2\xa3\x97\x1e\xfc\xd0\x3e\x4d\x87\xb5\xe6\x00\x32\x37\x23\xab\xfe\xf8\x1a\xa7\x1b\xea\x16\xbd\xf9\x56\x1a\xca\x75\xce\x32\x65\xde\x3a\xc8\xa1\x59\x0a\x61\xed\xe7\x3a\x7b\x69\x43\xdd\xf3\xe3\xfc\xf1\x9e\x47\x8f\x55\x85\x9d\xb7\x8d\x6b\xaa\x46\xb7\xa7\xe2\x15\x9f\x6f\x4f\x20\xcc\xb1\x8d\x5c\x41\xfb\x43\x02\x49", 206);
        				res = syz_usb_connect(0xfffffffffffffeff, 0x78, 0x20000100, 0x20000180);
        				if (res != -1)
        						r[6] = res;
        				break;
        			case 14:
        				syz_usb_disconnect(r[6]);
        				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-executor580379185 -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/amd64/3 (0.25s)
        	csource_test.go:121: 
        --- FAIL: TestGenerate/netbsd/amd64/2 (0.26s)
        	csource_test.go:121: 
FAIL
FAIL	github.com/google/syzkaller/pkg/csource	3.131s
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]