| // WARNING in kcov_remote_start |
| // https://syzkaller.appspot.com/bug?id=ba67ab2d27477dad7db5b960530d0e4fb60a722e |
| // status:invalid |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/mount.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <linux/usb/ch9.h> |
| |
| unsigned long long procid; |
| |
| static void sleep_ms(uint64_t ms) |
| { |
| usleep(ms * 1000); |
| } |
| |
| #define USB_DEBUG 0 |
| |
| #define USB_MAX_EP_NUM 32 |
| |
| struct usb_device_index { |
| struct usb_device_descriptor* dev; |
| struct usb_config_descriptor* config; |
| unsigned config_length; |
| struct usb_interface_descriptor* iface; |
| struct usb_endpoint_descriptor* eps[USB_MAX_EP_NUM]; |
| unsigned eps_num; |
| }; |
| |
| static bool parse_usb_descriptor(char* buffer, size_t length, |
| struct usb_device_index* index) |
| { |
| if (length < |
| sizeof(*index->dev) + sizeof(*index->config) + sizeof(*index->iface)) |
| return false; |
| index->dev = (struct usb_device_descriptor*)buffer; |
| index->config = (struct usb_config_descriptor*)(buffer + sizeof(*index->dev)); |
| index->config_length = length - sizeof(*index->dev); |
| index->iface = |
| (struct usb_interface_descriptor*)(buffer + sizeof(*index->dev) + |
| sizeof(*index->config)); |
| index->eps_num = 0; |
| 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_ENDPOINT) { |
| index->eps[index->eps_num] = |
| (struct usb_endpoint_descriptor*)(buffer + offset); |
| index->eps_num++; |
| } |
| if (index->eps_num == USB_MAX_EP_NUM) |
| break; |
| offset += desc_length; |
| } |
| return true; |
| } |
| |
| enum usb_fuzzer_event_type { |
| USB_FUZZER_EVENT_INVALID, |
| USB_FUZZER_EVENT_CONNECT, |
| USB_FUZZER_EVENT_DISCONNECT, |
| USB_FUZZER_EVENT_SUSPEND, |
| USB_FUZZER_EVENT_RESUME, |
| USB_FUZZER_EVENT_CONTROL, |
| }; |
| |
| struct usb_fuzzer_event { |
| uint32_t type; |
| uint32_t length; |
| char data[0]; |
| }; |
| |
| struct usb_fuzzer_init { |
| uint64_t speed; |
| const char* driver_name; |
| const char* device_name; |
| }; |
| |
| struct usb_fuzzer_ep_io { |
| uint16_t ep; |
| uint16_t flags; |
| uint32_t length; |
| char data[0]; |
| }; |
| |
| #define USB_FUZZER_IOCTL_INIT _IOW('U', 0, struct usb_fuzzer_init) |
| #define USB_FUZZER_IOCTL_RUN _IO('U', 1) |
| #define USB_FUZZER_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_fuzzer_event) |
| #define USB_FUZZER_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_fuzzer_ep_io) |
| #define USB_FUZZER_IOCTL_EP0_READ _IOWR('U', 4, struct usb_fuzzer_ep_io) |
| #define USB_FUZZER_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor) |
| #define USB_FUZZER_IOCTL_EP_WRITE _IOW('U', 7, struct usb_fuzzer_ep_io) |
| #define USB_FUZZER_IOCTL_EP_READ _IOWR('U', 8, struct usb_fuzzer_ep_io) |
| #define USB_FUZZER_IOCTL_CONFIGURE _IO('U', 9) |
| #define USB_FUZZER_IOCTL_VBUS_DRAW _IOW('U', 10, uint32_t) |
| |
| int usb_fuzzer_open() |
| { |
| return open("/sys/kernel/debug/usb-fuzzer", O_RDWR); |
| } |
| |
| int usb_fuzzer_init(int fd, uint32_t speed, const char* driver, |
| const char* device) |
| { |
| struct usb_fuzzer_init arg; |
| arg.speed = speed; |
| arg.driver_name = driver; |
| arg.device_name = device; |
| return ioctl(fd, USB_FUZZER_IOCTL_INIT, &arg); |
| } |
| |
| int usb_fuzzer_run(int fd) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_RUN, 0); |
| } |
| |
| int usb_fuzzer_event_fetch(int fd, struct usb_fuzzer_event* event) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_EVENT_FETCH, event); |
| } |
| |
| int usb_fuzzer_ep0_write(int fd, struct usb_fuzzer_ep_io* io) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_EP0_WRITE, io); |
| } |
| |
| int usb_fuzzer_ep0_read(int fd, struct usb_fuzzer_ep_io* io) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_EP0_READ, io); |
| } |
| |
| int usb_fuzzer_ep_write(int fd, struct usb_fuzzer_ep_io* io) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_EP_WRITE, io); |
| } |
| |
| int usb_fuzzer_ep_read(int fd, struct usb_fuzzer_ep_io* io) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_EP_READ, io); |
| } |
| |
| int usb_fuzzer_ep_enable(int fd, struct usb_endpoint_descriptor* desc) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_EP_ENABLE, desc); |
| } |
| |
| int usb_fuzzer_configure(int fd) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_CONFIGURE, 0); |
| } |
| |
| int usb_fuzzer_vbus_draw(int fd, uint32_t power) |
| { |
| return ioctl(fd, USB_FUZZER_IOCTL_VBUS_DRAW, power); |
| } |
| |
| #define USB_MAX_PACKET_SIZE 1024 |
| |
| struct usb_fuzzer_control_event { |
| struct usb_fuzzer_event inner; |
| struct usb_ctrlrequest ctrl; |
| char data[USB_MAX_PACKET_SIZE]; |
| }; |
| |
| struct usb_fuzzer_ep_io_data { |
| struct usb_fuzzer_ep_io inner; |
| char data[USB_MAX_PACKET_SIZE]; |
| }; |
| |
| 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 = "syzkaller"; |
| |
| static bool lookup_connect_response(struct vusb_connect_descriptors* descs, |
| struct usb_device_index* index, |
| struct usb_ctrlrequest* ctrl, |
| char** response_data, |
| uint32_t* response_length) |
| { |
| uint8_t str_idx; |
| 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 (str_idx >= descs->strs_len) { |
| *response_data = (char*)default_string; |
| *response_length = strlen(default_string); |
| } else { |
| *response_data = descs->strs[str_idx].str; |
| *response_length = descs->strs[str_idx].len; |
| } |
| return true; |
| case USB_DT_BOS: |
| *response_data = descs->bos; |
| *response_length = descs->bos_len; |
| return true; |
| case USB_DT_DEVICE_QUALIFIER: |
| *response_data = descs->qual; |
| *response_length = descs->qual_len; |
| return true; |
| default: |
| exit(1); |
| return false; |
| } |
| break; |
| default: |
| exit(1); |
| return false; |
| } |
| break; |
| default: |
| exit(1); |
| return false; |
| } |
| return false; |
| } |
| |
| 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; |
| char* dev = (char*)a2; |
| struct vusb_connect_descriptors* descs = (struct vusb_connect_descriptors*)a3; |
| if (!dev) { |
| return -1; |
| } |
| struct usb_device_index index; |
| memset(&index, 0, sizeof(index)); |
| int rv = 0; |
| rv = parse_usb_descriptor(dev, dev_len, &index); |
| if (!rv) { |
| return rv; |
| } |
| int fd = usb_fuzzer_open(); |
| if (fd < 0) { |
| return fd; |
| } |
| char device[32]; |
| sprintf(&device[0], "dummy_udc.%llu", procid); |
| rv = usb_fuzzer_init(fd, speed, "dummy_udc", &device[0]); |
| if (rv < 0) { |
| return rv; |
| } |
| rv = usb_fuzzer_run(fd); |
| if (rv < 0) { |
| return rv; |
| } |
| bool done = false; |
| while (!done) { |
| struct usb_fuzzer_control_event event; |
| event.inner.type = 0; |
| event.inner.length = sizeof(event.ctrl); |
| rv = usb_fuzzer_event_fetch(fd, (struct usb_fuzzer_event*)&event); |
| if (rv < 0) { |
| return rv; |
| } |
| if (event.inner.type != USB_FUZZER_EVENT_CONTROL) |
| continue; |
| bool response_found = false; |
| char* response_data = NULL; |
| uint32_t response_length = 0; |
| if (event.ctrl.bRequestType & USB_DIR_IN) { |
| response_found = lookup_connect_response( |
| descs, &index, &event.ctrl, &response_data, &response_length); |
| if (!response_found) { |
| return -1; |
| } |
| } else { |
| if ((event.ctrl.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD || |
| event.ctrl.bRequest != USB_REQ_SET_CONFIGURATION) { |
| exit(1); |
| return -1; |
| } |
| done = true; |
| } |
| if (done) { |
| rv = usb_fuzzer_vbus_draw(fd, index.config->bMaxPower); |
| if (rv < 0) { |
| return rv; |
| } |
| rv = usb_fuzzer_configure(fd); |
| if (rv < 0) { |
| return rv; |
| } |
| unsigned ep; |
| for (ep = 0; ep < index.eps_num; ep++) { |
| rv = usb_fuzzer_ep_enable(fd, index.eps[ep]); |
| if (rv < 0) { |
| } else { |
| } |
| } |
| } |
| struct usb_fuzzer_ep_io_data response; |
| response.inner.ep = 0; |
| response.inner.flags = 0; |
| if (response_length > sizeof(response.data)) |
| response_length = 0; |
| if (event.ctrl.wLength < response_length) |
| response_length = event.ctrl.wLength; |
| response.inner.length = response_length; |
| if (response_data) |
| memcpy(&response.data[0], response_data, response_length); |
| else |
| memset(&response.data[0], 0, response_length); |
| if (event.ctrl.bRequestType & USB_DIR_IN) { |
| rv = usb_fuzzer_ep0_write(fd, (struct usb_fuzzer_ep_io*)&response); |
| } else { |
| rv = usb_fuzzer_ep0_read(fd, (struct usb_fuzzer_ep_io*)&response); |
| } |
| if (rv < 0) { |
| return rv; |
| } |
| } |
| sleep_ms(200); |
| return fd; |
| } |
| |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| |
| memcpy( |
| (void*)0x20000400, |
| "\x12\x01\x00\x00\x00\x00\x00\x20\x6d\x04\x1c\xc7\x40\x00\x00\x00\x00\x01" |
| "\x09\x02\x24\x00\x01\x00\x00\xa0\x00\x09\x04\x00\x00\x09\x03\x01\x01\x00" |
| "\x09\x21\x00\x00\x00\x01\x22\x15\x00\x09\x05\x81\x03\x00\x00\x00\x00\x00" |
| "\xee\xb4\x88\x8f\xff\xfc\x1f\xe0\x2d\xa3\x65\xa9\xc4\x6b\xcb\x5b\x6a\x6b" |
| "\xb4\xd9\x37\x02\x99\x2a\x7d\x26\xce\xfe\x8b\x90\x61\x70\x1c\x3c\xcd\x35" |
| "\x2d\x15\x83\x2b\xe2\x59\x85\x90\x20\x08\x5b\x4a\x55\x25\xda\xaa\xfd\xc4" |
| "\x9f\x59\x66\xf9\x00\x63\x4c\x11\xc5\x62\x10\x23\x5d\xca\x74\xb0\x5a\xbe" |
| "\xdf\x3b\x46\xe5\xd9\x29\x2b\x05\x00\xe1\x8c\x4a\x00\x00\x00\x00\x9c\xc7" |
| "\x04\xcc\x79\x15\x55\x97\x94\x80\x5a\x7a\xb1\x3d\x44\x84\x90\xdb\xac\xf2" |
| "\x68\xac\x24\x72\x3a\xcf\x3c\xa4\x84\x0a\xf0\x39\xb7\xf9\xb8\x36\xbd\xe4" |
| "\x66\xbe\x4d\x32\x35\x99\x80\x1b\x61\xa4\xa4\xfd\x48\x44\xf9\xeb\xc1\xd2" |
| "\xc0\x99\xd1\x74\x7d\x8a\x91\xb7\x62\xf8\x21\x02\x49\x1b\x72\x36\x20\xa3" |
| "\xb8\x27\x0a\x84\x5f\xf9\xf1\xc3\xb2\x59\x2b\x1c\x7b\xf2\x32\x64\xe0\x73" |
| "\x61\x9b\x76\x05\xc4\x6f\xe4\x0f\xa7\xc3\xf5\x04\xd8\xc8\xea\x34\xf3\xb2" |
| "\x2e\x92\x00\x55\xf2\x4e\x2e\xb6\x78\xb7\x27\xfb\x1a\xc5\xfd\x57\x81\x44" |
| "\xe9\x37\xfd\x37\xa0\xd3\xc6\x04\x6a\xbd\xe8\x52\x6b\x5f\xca\xf1\x31\xe7" |
| "\xf4\x81\x2a\x08\x24\xfa\x5f\x4d\x83\x94\x8b\xa6\x68\xf5\x6a\xe3\xe8\x62" |
| "\x0d\x99\xb9\xc1\xf7\x85\x82\x65\x28\x78\x50\x84\x94\xe0\xc4\x14\xf9\x8f" |
| "\x00\x11\xe4\x80\x59\xb8\x75\x82\x9a\x88\x8f\xe1\x7b\x21\xdf\xa2\x20\x06" |
| "\xeb\xc7\x72\x17\x4d\x01\x54\x90\xa6\x44\x73\xe4\xc9\x35\x70\x45\x01\x30" |
| "\x1c\xf5\x2e\xd2\x74\x04\xac\x30\xd1\x8c\xbb\xee\xe2\x4d\x2b\x8f\x6e\x05" |
| "\x9c\x28\x8d\x50\xcc\x67\xf3\x86\x7c\xe5\x40\x31\xe1\x90\x5d\xc7\xc5\xea" |
| "\xa2\x6b\xe3\xf4\x42\xf0\x3b\x58\xa2\x86\xa0\xfd\xf0\xf9\xf5\x56\xb7\x2c" |
| "\xe8\x9f\x13\xbc\xd8\xe8\x93\xda\x40\x0a\xd1\x31\x8d\x76\xa8\x62\xa7\x6f" |
| "\xb7\xa1\x49\xaf\x39\x37\x9d\x9f\x4e\xdf\x33\xe0\x83\xb8\x26\x9d\xa2\x4c" |
| "\xc9\xf0\x90\xff\xe7\xeb\x07\x8a\x60\x50\x1f\x47\x43\x95\x46\x5e\x68\x7f" |
| "\x67\xcf\xef\x7b\xc9\x04\x42\xc4\x2d\x43\xd1\x08\x41\x3a\x24\xdc\x94\x25" |
| "\xf0\xb3\x26\xc2\xf3\x75\x9c\xb7\x96\xfa\x6a\x86\x75\x57\x55\x08\x49\xb6" |
| "\xc9\xc5\xa3\x4b\x7a\x64\x98\xeb\xd5\x0e\x4e\x0c\xe1\xda\x1d\x05\x8d\xeb" |
| "\x3d\x42\x44\x73\x32\xcb\xbd\xe6\xec\xc1\x23\xcc\x2e\x4d\x4d\x3e\x50\x2b" |
| "\xdd\xa0\xdb\xc9\x54\x78\xa0\x2c\xef\xc6\xdf\x24\x2c\xca\x03\x8f\xc4\x38" |
| "\x36\x94\xde\x69\x8b\xec\xde\xeb\xdc\xe5\x9a\x82\xff\x59\x44\x83\x31\x9b" |
| "\x51\xea\xed\xd1\x51\xc3\xf8\x9f\x28\x21\x22\x45\xf0\xc8\xa4\x1d\x0d\x95" |
| "\x7b\x4c\x11\xb9\x04\xab\x8a\x11\x46\x43\x88\x31\x63\xb1\x68\x27\x5d\xc3" |
| "\x8b\x0d\x9d\x64\xfc\xc9\xd1\x62\x3f\xcb\xf0\x7e\x5a\x33\x6a\x0f\x00\x00" |
| "\x00\x00\x00\x00\x0a\x37\x25\x33\x11\x27\x6f\xf7\x04\x39\xc7\x6d\xef\xb6" |
| "\x22\x9b\xb9\x59\xb0\x07\xf3\x41\xce\x76\x6c\x42\x91\x20\x98\x57\x70\x75" |
| "\x9f\x34\xda\x7c\x1c\x5f\x0b\xbc\x9c\xac\xbf\x7f\xe7\x09\x00", |
| 681); |
| syz_usb_connect(0, 0x36, 0x20000400, 0); |
| return 0; |
| } |