| // KMSAN: uninit-value in rt2500usb_probe_hw |
| // https://syzkaller.appspot.com/bug?id=5402df7259c74e15a12992e739b5ac54c9b8a4ce |
| // status:open |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <dirent.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <signal.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/prctl.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <linux/usb/ch9.h> |
| |
| unsigned long long procid; |
| |
| static void sleep_ms(uint64_t ms) |
| { |
| usleep(ms * 1000); |
| } |
| |
| static uint64_t current_time_ms(void) |
| { |
| struct timespec ts; |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| exit(1); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| static bool write_file(const char* file, const char* what, ...) |
| { |
| char buf[1024]; |
| va_list args; |
| va_start(args, what); |
| vsnprintf(buf, sizeof(buf), what, args); |
| va_end(args); |
| buf[sizeof(buf) - 1] = 0; |
| int len = strlen(buf); |
| int fd = open(file, O_WRONLY | O_CLOEXEC); |
| if (fd == -1) |
| return false; |
| if (write(fd, buf, len) != len) { |
| int err = errno; |
| close(fd); |
| errno = err; |
| return false; |
| } |
| close(fd); |
| return true; |
| } |
| |
| #define USB_DEBUG 0 |
| |
| #define USB_MAX_IFACE_NUM 4 |
| #define USB_MAX_EP_NUM 32 |
| |
| struct usb_iface_index { |
| struct usb_interface_descriptor* iface; |
| struct usb_endpoint_descriptor* eps[USB_MAX_EP_NUM]; |
| unsigned eps_num; |
| }; |
| |
| struct usb_device_index { |
| struct usb_device_descriptor* dev; |
| struct usb_config_descriptor* config; |
| unsigned config_length; |
| struct usb_iface_index ifaces[USB_MAX_IFACE_NUM]; |
| unsigned ifaces_num; |
| }; |
| |
| static bool parse_usb_descriptor(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->config_length = length - sizeof(*index->dev); |
| 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; |
| } |
| 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) |
| iface->eps[iface->eps_num++] = |
| (struct usb_endpoint_descriptor*)(buffer + offset); |
| } |
| 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[] = {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(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 (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: |
| *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.ifaces[0].eps_num; ep++) { |
| rv = usb_fuzzer_ep_enable(fd, index.ifaces[0].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; |
| } |
| |
| static void kill_and_wait(int pid, int* status) |
| { |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| int i; |
| for (i = 0; i < 100; i++) { |
| if (waitpid(-1, status, WNOHANG | __WALL) == pid) |
| return; |
| usleep(1000); |
| } |
| DIR* dir = opendir("/sys/fs/fuse/connections"); |
| if (dir) { |
| for (;;) { |
| struct dirent* ent = readdir(dir); |
| if (!ent) |
| break; |
| if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) |
| continue; |
| char abort[300]; |
| snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", |
| ent->d_name); |
| int fd = open(abort, O_WRONLY); |
| if (fd == -1) { |
| continue; |
| } |
| if (write(fd, abort, 1) < 0) { |
| } |
| close(fd); |
| } |
| closedir(dir); |
| } else { |
| } |
| while (waitpid(-1, status, __WALL) != pid) { |
| } |
| } |
| |
| static void setup_test() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| write_file("/proc/self/oom_score_adj", "1000"); |
| } |
| |
| static void execute_one(void); |
| |
| #define WAIT_FLAGS __WALL |
| |
| static void loop(void) |
| { |
| int iter; |
| for (iter = 0;; iter++) { |
| int pid = fork(); |
| if (pid < 0) |
| exit(1); |
| if (pid == 0) { |
| setup_test(); |
| 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; |
| } |
| } |
| } |
| |
| void execute_one(void) |
| { |
| *(uint8_t*)0x20000140 = 0x12; |
| *(uint8_t*)0x20000141 = 1; |
| *(uint16_t*)0x20000142 = 0; |
| *(uint8_t*)0x20000144 = 0x9a; |
| *(uint8_t*)0x20000145 = 0x3b; |
| *(uint8_t*)0x20000146 = 0xea; |
| *(uint8_t*)0x20000147 = 0x10; |
| *(uint16_t*)0x20000148 = 0x2001; |
| *(uint16_t*)0x2000014a = 0x3c00; |
| *(uint16_t*)0x2000014c = 0x667a; |
| *(uint8_t*)0x2000014e = 0; |
| *(uint8_t*)0x2000014f = 0; |
| *(uint8_t*)0x20000150 = 0; |
| *(uint8_t*)0x20000151 = 1; |
| *(uint8_t*)0x20000152 = 9; |
| *(uint8_t*)0x20000153 = 2; |
| *(uint16_t*)0x20000154 = 0x12; |
| *(uint8_t*)0x20000156 = 1; |
| *(uint8_t*)0x20000157 = 0; |
| *(uint8_t*)0x20000158 = 0; |
| *(uint8_t*)0x20000159 = 0; |
| *(uint8_t*)0x2000015a = 0; |
| *(uint8_t*)0x2000015b = 9; |
| *(uint8_t*)0x2000015c = 4; |
| *(uint8_t*)0x2000015d = 0x30; |
| *(uint8_t*)0x2000015e = 0; |
| *(uint8_t*)0x2000015f = 0; |
| *(uint8_t*)0x20000160 = 0xe9; |
| *(uint8_t*)0x20000161 = 0x8f; |
| *(uint8_t*)0x20000162 = 0xf9; |
| *(uint8_t*)0x20000163 = 0; |
| syz_usb_connect(0, 0x24, 0x20000140, 0); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |