mirror of
https://github.com/reactos/syzkaller.git
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606 lines
17 KiB
C
606 lines
17 KiB
C
// Copyright 2020 syzkaller project authors. All rights reserved.
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// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
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// This file is shared between executor and csource package.
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// Linux-specific implementation of syz_usb_* pseudo-syscalls.
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#include "common_usb.h"
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#define UDC_NAME_LENGTH_MAX 128
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struct usb_raw_init {
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__u8 driver_name[UDC_NAME_LENGTH_MAX];
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__u8 device_name[UDC_NAME_LENGTH_MAX];
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__u8 speed;
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};
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enum usb_raw_event_type {
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USB_RAW_EVENT_INVALID = 0,
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USB_RAW_EVENT_CONNECT = 1,
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USB_RAW_EVENT_CONTROL = 2,
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};
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struct usb_raw_event {
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__u32 type;
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__u32 length;
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__u8 data[0];
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};
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struct usb_raw_ep_io {
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__u16 ep;
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__u16 flags;
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__u32 length;
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__u8 data[0];
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};
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#define USB_RAW_EPS_NUM_MAX 30
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#define USB_RAW_EP_NAME_MAX 16
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#define USB_RAW_EP_ADDR_ANY 0xff
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struct usb_raw_ep_caps {
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__u32 type_control : 1;
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__u32 type_iso : 1;
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__u32 type_bulk : 1;
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__u32 type_int : 1;
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__u32 dir_in : 1;
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__u32 dir_out : 1;
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};
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struct usb_raw_ep_limits {
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__u16 maxpacket_limit;
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__u16 max_streams;
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__u32 reserved;
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};
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struct usb_raw_ep_info {
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__u8 name[USB_RAW_EP_NAME_MAX];
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__u32 addr;
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struct usb_raw_ep_caps caps;
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struct usb_raw_ep_limits limits;
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};
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struct usb_raw_eps_info {
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struct usb_raw_ep_info eps[USB_RAW_EPS_NUM_MAX];
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};
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#define USB_RAW_IOCTL_INIT _IOW('U', 0, struct usb_raw_init)
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#define USB_RAW_IOCTL_RUN _IO('U', 1)
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#define USB_RAW_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_raw_event)
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#define USB_RAW_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_raw_ep_io)
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#define USB_RAW_IOCTL_EP0_READ _IOWR('U', 4, struct usb_raw_ep_io)
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#define USB_RAW_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor)
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#define USB_RAW_IOCTL_EP_DISABLE _IOW('U', 6, __u32)
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#define USB_RAW_IOCTL_EP_WRITE _IOW('U', 7, struct usb_raw_ep_io)
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#define USB_RAW_IOCTL_EP_READ _IOWR('U', 8, struct usb_raw_ep_io)
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#define USB_RAW_IOCTL_CONFIGURE _IO('U', 9)
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#define USB_RAW_IOCTL_VBUS_DRAW _IOW('U', 10, __u32)
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#define USB_RAW_IOCTL_EPS_INFO _IOR('U', 11, struct usb_raw_eps_info)
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#define USB_RAW_IOCTL_EP0_STALL _IO('U', 12)
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#define USB_RAW_IOCTL_EP_SET_HALT _IOW('U', 13, __u32)
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#define USB_RAW_IOCTL_EP_CLEAR_HALT _IOW('U', 14, __u32)
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#define USB_RAW_IOCTL_EP_SET_WEDGE _IOW('U', 15, __u32)
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static int usb_raw_open()
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{
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return open("/dev/raw-gadget", O_RDWR);
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}
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static int usb_raw_init(int fd, uint32 speed, const char* driver, const char* device)
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{
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struct usb_raw_init arg;
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strncpy((char*)&arg.driver_name[0], driver, sizeof(arg.driver_name));
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strncpy((char*)&arg.device_name[0], device, sizeof(arg.device_name));
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arg.speed = speed;
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return ioctl(fd, USB_RAW_IOCTL_INIT, &arg);
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}
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static int usb_raw_run(int fd)
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{
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return ioctl(fd, USB_RAW_IOCTL_RUN, 0);
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}
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static int usb_raw_event_fetch(int fd, struct usb_raw_event* event)
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{
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return ioctl(fd, USB_RAW_IOCTL_EVENT_FETCH, event);
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}
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static int usb_raw_ep0_write(int fd, struct usb_raw_ep_io* io)
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{
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return ioctl(fd, USB_RAW_IOCTL_EP0_WRITE, io);
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}
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static int usb_raw_ep0_read(int fd, struct usb_raw_ep_io* io)
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{
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return ioctl(fd, USB_RAW_IOCTL_EP0_READ, io);
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}
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#if SYZ_EXECUTOR || __NR_syz_usb_ep_write
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static int usb_raw_ep_write(int fd, struct usb_raw_ep_io* io)
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{
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return ioctl(fd, USB_RAW_IOCTL_EP_WRITE, io);
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}
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#endif // SYZ_EXECUTOR || __NR_syz_usb_ep_write
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#if SYZ_EXECUTOR || __NR_syz_usb_ep_read
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static int usb_raw_ep_read(int fd, struct usb_raw_ep_io* io)
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{
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return ioctl(fd, USB_RAW_IOCTL_EP_READ, io);
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}
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#endif // SYZ_EXECUTOR || __NR_syz_usb_ep_read
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static int usb_raw_ep_enable(int fd, struct usb_endpoint_descriptor* desc)
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{
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return ioctl(fd, USB_RAW_IOCTL_EP_ENABLE, desc);
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}
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static int usb_raw_ep_disable(int fd, int ep)
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{
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return ioctl(fd, USB_RAW_IOCTL_EP_DISABLE, ep);
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}
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static int usb_raw_configure(int fd)
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{
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return ioctl(fd, USB_RAW_IOCTL_CONFIGURE, 0);
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}
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static int usb_raw_vbus_draw(int fd, uint32 power)
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{
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return ioctl(fd, USB_RAW_IOCTL_VBUS_DRAW, power);
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}
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static int usb_raw_ep0_stall(int fd)
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{
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return ioctl(fd, USB_RAW_IOCTL_EP0_STALL, 0);
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}
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#if SYZ_EXECUTOR || __NR_syz_usb_control_io
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static int lookup_interface(int fd, uint8 bInterfaceNumber, uint8 bAlternateSetting)
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{
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struct usb_device_index* index = lookup_usb_index(fd);
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int i;
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if (!index)
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return -1;
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for (i = 0; i < index->ifaces_num; i++) {
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if (index->ifaces[i].bInterfaceNumber == bInterfaceNumber &&
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index->ifaces[i].bAlternateSetting == bAlternateSetting)
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return i;
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}
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return -1;
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}
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#endif // SYZ_EXECUTOR || __NR_syz_usb_control_io
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#if SYZ_EXECUTOR || __NR_syz_usb_ep_write || __NR_syz_usb_ep_read
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static int lookup_endpoint(int fd, uint8 bEndpointAddress)
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{
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struct usb_device_index* index = lookup_usb_index(fd);
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int ep;
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if (!index)
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return -1;
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if (index->iface_cur < 0)
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return -1;
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for (ep = 0; index->ifaces[index->iface_cur].eps_num; ep++)
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if (index->ifaces[index->iface_cur].eps[ep].desc.bEndpointAddress == bEndpointAddress)
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return index->ifaces[index->iface_cur].eps[ep].handle;
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return -1;
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}
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#endif // SYZ_EXECUTOR || __NR_syz_usb_ep_write || __NR_syz_usb_ep_read
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static void set_interface(int fd, int n)
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{
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struct usb_device_index* index = lookup_usb_index(fd);
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int ep;
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if (!index)
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return;
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if (index->iface_cur >= 0 && index->iface_cur < index->ifaces_num) {
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for (ep = 0; ep < index->ifaces[index->iface_cur].eps_num; ep++) {
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int rv = usb_raw_ep_disable(fd, index->ifaces[index->iface_cur].eps[ep].handle);
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if (rv < 0) {
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debug("set_interface: failed to disable endpoint 0x%02x\n",
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index->ifaces[index->iface_cur].eps[ep].desc.bEndpointAddress);
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} else {
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debug("set_interface: endpoint 0x%02x disabled\n",
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index->ifaces[index->iface_cur].eps[ep].desc.bEndpointAddress);
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}
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}
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}
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if (n >= 0 && n < index->ifaces_num) {
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for (ep = 0; ep < index->ifaces[n].eps_num; ep++) {
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int rv = usb_raw_ep_enable(fd, &index->ifaces[n].eps[ep].desc);
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if (rv < 0) {
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debug("set_interface: failed to enable endpoint 0x%02x\n",
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index->ifaces[n].eps[ep].desc.bEndpointAddress);
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} else {
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debug("set_interface: endpoint 0x%02x enabled as %d\n",
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index->ifaces[n].eps[ep].desc.bEndpointAddress, rv);
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index->ifaces[n].eps[ep].handle = rv;
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}
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}
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index->iface_cur = n;
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}
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}
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static int configure_device(int fd)
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{
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struct usb_device_index* index = lookup_usb_index(fd);
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if (!index)
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return -1;
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int rv = usb_raw_vbus_draw(fd, index->bMaxPower);
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if (rv < 0) {
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debug("configure_device: usb_raw_vbus_draw failed with %d\n", rv);
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return rv;
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}
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rv = usb_raw_configure(fd);
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if (rv < 0) {
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debug("configure_device: usb_raw_configure failed with %d\n", rv);
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return rv;
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}
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set_interface(fd, 0);
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return 0;
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}
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#define USB_MAX_PACKET_SIZE 4096
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struct usb_raw_control_event {
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struct usb_raw_event inner;
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struct usb_ctrlrequest ctrl;
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char data[USB_MAX_PACKET_SIZE];
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};
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struct usb_raw_ep_io_data {
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struct usb_raw_ep_io inner;
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char data[USB_MAX_PACKET_SIZE];
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};
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static volatile long syz_usb_connect_impl(uint64 speed, uint64 dev_len, const char* dev,
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const struct vusb_connect_descriptors* descs,
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lookup_connect_out_response_t lookup_connect_response_out)
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{
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debug("syz_usb_connect: dev: %p\n", dev);
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if (!dev) {
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debug("syz_usb_connect: dev is null\n");
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return -1;
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}
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debug("syz_usb_connect: device data:\n");
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debug_dump_data(dev, dev_len);
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int fd = usb_raw_open();
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if (fd < 0) {
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debug("syz_usb_connect: usb_raw_open failed with %d\n", fd);
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return fd;
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}
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if (fd >= MAX_FDS) {
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close(fd);
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debug("syz_usb_connect: too many open fds\n");
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return -1;
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}
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debug("syz_usb_connect: usb_raw_open success\n");
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struct usb_device_index* index = add_usb_index(fd, dev, dev_len);
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if (!index) {
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debug("syz_usb_connect: add_usb_index failed\n");
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return -1;
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}
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debug("syz_usb_connect: add_usb_index success\n");
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#if USB_DEBUG
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NONFAILING(analyze_usb_device(index));
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#endif
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// TODO: consider creating two dummy_udc's per proc to increace the chance of
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// triggering interaction between multiple USB devices within the same program.
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char device[32];
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sprintf(&device[0], "dummy_udc.%llu", procid);
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int rv = usb_raw_init(fd, speed, "dummy_udc", &device[0]);
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if (rv < 0) {
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debug("syz_usb_connect: usb_raw_init failed with %d\n", rv);
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return rv;
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}
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debug("syz_usb_connect: usb_raw_init success\n");
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rv = usb_raw_run(fd);
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if (rv < 0) {
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debug("syz_usb_connect: usb_raw_run failed with %d\n", rv);
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return rv;
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}
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debug("syz_usb_connect: usb_raw_run success\n");
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bool done = false;
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while (!done) {
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struct usb_raw_control_event event;
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event.inner.type = 0;
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event.inner.length = sizeof(event.ctrl);
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rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event);
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if (rv < 0) {
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debug("syz_usb_connect: usb_raw_event_fetch failed with %d\n", rv);
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return rv;
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}
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if (event.inner.type != USB_RAW_EVENT_CONTROL)
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continue;
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debug("syz_usb_connect: bReqType: 0x%x (%s), bReq: 0x%x, wVal: 0x%x, wIdx: 0x%x, wLen: %d\n",
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event.ctrl.bRequestType, (event.ctrl.bRequestType & USB_DIR_IN) ? "IN" : "OUT",
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event.ctrl.bRequest, event.ctrl.wValue, event.ctrl.wIndex, event.ctrl.wLength);
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#if USB_DEBUG
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analyze_control_request(fd, &event.ctrl);
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#endif
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char* response_data = NULL;
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uint32 response_length = 0;
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if (event.ctrl.bRequestType & USB_DIR_IN) {
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bool response_found = false;
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NONFAILING(response_found = lookup_connect_response_in(fd, descs, &event.ctrl, &response_data, &response_length));
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if (!response_found) {
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debug("syz_usb_connect: unknown request, stalling\n");
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usb_raw_ep0_stall(fd);
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continue;
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}
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} else {
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if (!lookup_connect_response_out(fd, descs, &event.ctrl, &done)) {
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debug("syz_usb_connect: unknown request, stalling\n");
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usb_raw_ep0_stall(fd);
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continue;
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}
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response_data = NULL;
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response_length = event.ctrl.wLength;
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}
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if ((event.ctrl.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
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event.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
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rv = configure_device(fd);
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if (rv < 0) {
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debug("syz_usb_connect: configure_device failed with %d\n", rv);
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return rv;
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}
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}
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struct usb_raw_ep_io_data response;
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response.inner.ep = 0;
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response.inner.flags = 0;
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if (response_length > sizeof(response.data))
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response_length = 0;
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if (event.ctrl.wLength < response_length)
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response_length = event.ctrl.wLength;
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response.inner.length = response_length;
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if (response_data)
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memcpy(&response.data[0], response_data, response_length);
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else
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memset(&response.data[0], 0, response_length);
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if (event.ctrl.bRequestType & USB_DIR_IN) {
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debug("syz_usb_connect: writing %d bytes\n", response.inner.length);
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rv = usb_raw_ep0_write(fd, (struct usb_raw_ep_io*)&response);
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} else {
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rv = usb_raw_ep0_read(fd, (struct usb_raw_ep_io*)&response);
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debug("syz_usb_connect: read %d bytes\n", response.inner.length);
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debug_dump_data(&event.data[0], response.inner.length);
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}
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if (rv < 0) {
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debug("syz_usb_connect: usb_raw_ep0_read/write failed with %d\n", rv);
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return rv;
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}
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}
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sleep_ms(200);
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debug("syz_usb_connect: configured\n");
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return fd;
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}
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#if SYZ_EXECUTOR || __NR_syz_usb_connect
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static volatile long syz_usb_connect(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
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{
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uint64 speed = a0;
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uint64 dev_len = a1;
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const char* dev = (const char*)a2;
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const struct vusb_connect_descriptors* descs = (const struct vusb_connect_descriptors*)a3;
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return syz_usb_connect_impl(speed, dev_len, dev, descs, &lookup_connect_response_out_generic);
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}
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#endif // SYZ_EXECUTOR || __NR_syz_usb_connect
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#if SYZ_EXECUTOR || __NR_syz_usb_connect_ath9k
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static volatile long syz_usb_connect_ath9k(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
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{
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uint64 speed = a0;
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uint64 dev_len = a1;
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const char* dev = (const char*)a2;
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const struct vusb_connect_descriptors* descs = (const struct vusb_connect_descriptors*)a3;
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return syz_usb_connect_impl(speed, dev_len, dev, descs, &lookup_connect_response_out_ath9k);
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}
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#endif // SYZ_EXECUTOR || __NR_syz_usb_connect_ath9k
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#if SYZ_EXECUTOR || __NR_syz_usb_control_io
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static volatile long syz_usb_control_io(volatile long a0, volatile long a1, volatile long a2)
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{
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int fd = a0;
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const struct vusb_descriptors* descs = (const struct vusb_descriptors*)a1;
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const struct vusb_responses* resps = (const struct vusb_responses*)a2;
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struct usb_raw_control_event event;
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event.inner.type = 0;
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event.inner.length = USB_MAX_PACKET_SIZE;
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int rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event);
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if (rv < 0) {
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debug("syz_usb_control_io: usb_raw_ep0_read failed with %d\n", rv);
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return rv;
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}
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if (event.inner.type != USB_RAW_EVENT_CONTROL) {
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debug("syz_usb_control_io: wrong event type: %d\n", (int)event.inner.type);
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return -1;
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}
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debug("syz_usb_control_io: bReqType: 0x%x (%s), bReq: 0x%x, wVal: 0x%x, wIdx: 0x%x, wLen: %d\n",
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event.ctrl.bRequestType, (event.ctrl.bRequestType & USB_DIR_IN) ? "IN" : "OUT",
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event.ctrl.bRequest, event.ctrl.wValue, event.ctrl.wIndex, event.ctrl.wLength);
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#if USB_DEBUG
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analyze_control_request(fd, &event.ctrl);
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#endif
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bool response_found = false;
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char* response_data = NULL;
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uint32 response_length = 0;
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if ((event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength) {
|
|
NONFAILING(response_found = lookup_control_response(descs, resps, &event.ctrl, &response_data, &response_length));
|
|
if (!response_found) {
|
|
debug("syz_usb_connect: unknown request, stalling\n");
|
|
usb_raw_ep0_stall(fd);
|
|
return -1;
|
|
}
|
|
} else {
|
|
if ((event.ctrl.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD ||
|
|
event.ctrl.bRequest == USB_REQ_SET_INTERFACE) {
|
|
int iface_num = event.ctrl.wIndex;
|
|
int alt_set = event.ctrl.wValue;
|
|
debug("syz_usb_control_io: setting interface (%d, %d)\n", iface_num, alt_set);
|
|
int iface_index = lookup_interface(fd, iface_num, alt_set);
|
|
if (iface_index < 0) {
|
|
debug("syz_usb_control_io: interface (%d, %d) not found\n", iface_num, alt_set);
|
|
} else {
|
|
set_interface(fd, iface_index);
|
|
debug("syz_usb_control_io: interface (%d, %d) set\n", iface_num, alt_set);
|
|
}
|
|
}
|
|
|
|
response_length = event.ctrl.wLength;
|
|
}
|
|
|
|
struct usb_raw_ep_io_data response;
|
|
response.inner.ep = 0;
|
|
response.inner.flags = 0;
|
|
if (response_length > sizeof(response.data))
|
|
response_length = 0;
|
|
if (event.ctrl.wLength < response_length)
|
|
response_length = event.ctrl.wLength;
|
|
if ((event.ctrl.bRequestType & USB_DIR_IN) && !event.ctrl.wLength) {
|
|
// Something fishy is going on, try to read more data.
|
|
response_length = USB_MAX_PACKET_SIZE;
|
|
}
|
|
response.inner.length = response_length;
|
|
if (response_data)
|
|
memcpy(&response.data[0], response_data, response_length);
|
|
else
|
|
memset(&response.data[0], 0, response_length);
|
|
|
|
if ((event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength) {
|
|
debug("syz_usb_control_io: writing %d bytes\n", response.inner.length);
|
|
debug_dump_data(&response.data[0], response.inner.length);
|
|
rv = usb_raw_ep0_write(fd, (struct usb_raw_ep_io*)&response);
|
|
} else {
|
|
rv = usb_raw_ep0_read(fd, (struct usb_raw_ep_io*)&response);
|
|
debug("syz_usb_control_io: read %d bytes\n", response.inner.length);
|
|
debug_dump_data(&response.data[0], response.inner.length);
|
|
}
|
|
if (rv < 0) {
|
|
debug("syz_usb_control_io: usb_raw_ep0_read/write failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
|
|
sleep_ms(200);
|
|
|
|
return 0;
|
|
}
|
|
#endif // SYZ_EXECUTOR || __NR_syz_usb_control_io
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_ep_write
|
|
static volatile long syz_usb_ep_write(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
|
|
{
|
|
int fd = a0;
|
|
uint8 ep = a1;
|
|
uint32 len = a2;
|
|
char* data = (char*)a3;
|
|
|
|
int ep_handle = lookup_endpoint(fd, ep);
|
|
if (ep_handle < 0) {
|
|
debug("syz_usb_ep_write: endpoint not found\n");
|
|
return -1;
|
|
}
|
|
debug("syz_usb_ep_write: endpoint handle: %d\n", ep_handle);
|
|
|
|
struct usb_raw_ep_io_data io_data;
|
|
io_data.inner.ep = ep_handle;
|
|
io_data.inner.flags = 0;
|
|
if (len > sizeof(io_data.data))
|
|
len = sizeof(io_data.data);
|
|
io_data.inner.length = len;
|
|
NONFAILING(memcpy(&io_data.data[0], data, len));
|
|
|
|
int rv = usb_raw_ep_write(fd, (struct usb_raw_ep_io*)&io_data);
|
|
if (rv < 0) {
|
|
debug("syz_usb_ep_write: usb_raw_ep_write failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
|
|
sleep_ms(200);
|
|
|
|
return 0;
|
|
}
|
|
#endif // SYZ_EXECUTOR || __NR_syz_usb_ep_write
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_ep_read
|
|
static volatile long syz_usb_ep_read(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
|
|
{
|
|
int fd = a0;
|
|
uint8 ep = a1;
|
|
uint32 len = a2;
|
|
char* data = (char*)a3;
|
|
|
|
int ep_handle = lookup_endpoint(fd, ep);
|
|
if (ep_handle < 0) {
|
|
debug("syz_usb_ep_read: endpoint not found\n");
|
|
return -1;
|
|
}
|
|
debug("syz_usb_ep_read: endpoint handle: %d\n", ep_handle);
|
|
|
|
struct usb_raw_ep_io_data io_data;
|
|
io_data.inner.ep = ep_handle;
|
|
io_data.inner.flags = 0;
|
|
if (len > sizeof(io_data.data))
|
|
len = sizeof(io_data.data);
|
|
io_data.inner.length = len;
|
|
|
|
int rv = usb_raw_ep_read(fd, (struct usb_raw_ep_io*)&io_data);
|
|
if (rv < 0) {
|
|
debug("syz_usb_ep_read: usb_raw_ep_read failed with %d\n", rv);
|
|
return rv;
|
|
}
|
|
|
|
NONFAILING(memcpy(&data[0], &io_data.data[0], io_data.inner.length));
|
|
|
|
debug("syz_usb_ep_read: received data:\n");
|
|
debug_dump_data(&io_data.data[0], io_data.inner.length);
|
|
|
|
sleep_ms(200);
|
|
|
|
return 0;
|
|
}
|
|
#endif // SYZ_EXECUTOR || __NR_syz_usb_ep_read
|
|
|
|
#if SYZ_EXECUTOR || __NR_syz_usb_disconnect
|
|
static volatile long syz_usb_disconnect(volatile long a0)
|
|
{
|
|
int fd = a0;
|
|
|
|
int rv = close(fd);
|
|
|
|
sleep_ms(200);
|
|
|
|
return rv;
|
|
}
|
|
#endif // SYZ_EXECUTOR || __NR_syz_usb_disconnect
|