// https://syzkaller.appspot.com/bug?id=c0e9f2f7a2bb2c5e24d94a1652b546dbcdb25cfd // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static 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 MAX_FDS 30 #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 struct usb_device_index* lookup_usb_index(int fd) { for (int 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; } 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; if (!parse_usb_descriptor(dev, dev_len, &usb_devices[i].index)) return NULL; __atomic_store_n(&usb_devices[i].fd, fd, __ATOMIC_RELEASE); return &usb_devices[i].index; } 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, struct usb_qualifier_descriptor* qual, 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) { 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_data = (char*)qual; *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; } struct vusb_descriptor { uint8_t req_type; uint8_t desc_type; uint32_t len; char data[0]; } __attribute__((packed)); struct vusb_descriptors { uint32_t len; struct vusb_descriptor* generic; struct vusb_descriptor* descs[0]; } __attribute__((packed)); struct vusb_response { uint8_t type; uint8_t req; uint32_t len; char data[0]; } __attribute__((packed)); struct vusb_responses { uint32_t len; struct vusb_response* generic; struct vusb_response* resps[0]; } __attribute__((packed)); static bool lookup_control_response(const struct vusb_descriptors* descs, const struct vusb_responses* resps, struct usb_ctrlrequest* ctrl, char** response_data, uint32_t* response_length) { int descs_num = 0; int resps_num = 0; if (descs) descs_num = (descs->len - offsetof(struct vusb_descriptors, descs)) / sizeof(descs->descs[0]); if (resps) resps_num = (resps->len - offsetof(struct vusb_responses, resps)) / sizeof(resps->resps[0]); uint8_t req = ctrl->bRequest; uint8_t req_type = ctrl->bRequestType & USB_TYPE_MASK; uint8_t desc_type = ctrl->wValue >> 8; if (req == USB_REQ_GET_DESCRIPTOR) { int i; for (i = 0; i < descs_num; i++) { struct vusb_descriptor* desc = descs->descs[i]; if (!desc) continue; if (desc->req_type == req_type && desc->desc_type == desc_type) { *response_length = desc->len; if (*response_length != 0) *response_data = &desc->data[0]; else *response_data = NULL; return true; } } if (descs && descs->generic) { *response_data = &descs->generic->data[0]; *response_length = descs->generic->len; return true; } } else { int i; for (i = 0; i < resps_num; i++) { struct vusb_response* resp = resps->resps[i]; if (!resp) continue; if (resp->type == req_type && resp->req == req) { *response_length = resp->len; if (*response_length != 0) *response_data = &resp->data[0]; else *response_data = NULL; return true; } } if (resps && resps->generic) { *response_data = &resps->generic->data[0]; *response_length = resps->generic->len; return true; } } return false; } #define UDC_NAME_LENGTH_MAX 128 struct usb_raw_init { __u8 driver_name[UDC_NAME_LENGTH_MAX]; __u8 device_name[UDC_NAME_LENGTH_MAX]; __u8 speed; }; enum usb_raw_event_type { USB_RAW_EVENT_INVALID = 0, USB_RAW_EVENT_CONNECT = 1, USB_RAW_EVENT_CONTROL = 2, }; struct usb_raw_event { __u32 type; __u32 length; __u8 data[0]; }; struct usb_raw_ep_io { __u16 ep; __u16 flags; __u32 length; __u8 data[0]; }; #define USB_RAW_EPS_NUM_MAX 30 #define USB_RAW_EP_NAME_MAX 16 #define USB_RAW_EP_ADDR_ANY 0xff struct usb_raw_ep_caps { __u32 type_control : 1; __u32 type_iso : 1; __u32 type_bulk : 1; __u32 type_int : 1; __u32 dir_in : 1; __u32 dir_out : 1; }; struct usb_raw_ep_limits { __u16 maxpacket_limit; __u16 max_streams; __u32 reserved; }; struct usb_raw_ep_info { __u8 name[USB_RAW_EP_NAME_MAX]; __u32 addr; struct usb_raw_ep_caps caps; struct usb_raw_ep_limits limits; }; struct usb_raw_eps_info { struct usb_raw_ep_info eps[USB_RAW_EPS_NUM_MAX]; }; #define USB_RAW_IOCTL_INIT _IOW('U', 0, struct usb_raw_init) #define USB_RAW_IOCTL_RUN _IO('U', 1) #define USB_RAW_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_raw_event) #define USB_RAW_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_raw_ep_io) #define USB_RAW_IOCTL_EP0_READ _IOWR('U', 4, struct usb_raw_ep_io) #define USB_RAW_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor) #define USB_RAW_IOCTL_EP_DISABLE _IOW('U', 6, __u32) #define USB_RAW_IOCTL_EP_WRITE _IOW('U', 7, struct usb_raw_ep_io) #define USB_RAW_IOCTL_EP_READ _IOWR('U', 8, struct usb_raw_ep_io) #define USB_RAW_IOCTL_CONFIGURE _IO('U', 9) #define USB_RAW_IOCTL_VBUS_DRAW _IOW('U', 10, __u32) #define USB_RAW_IOCTL_EPS_INFO _IOR('U', 11, struct usb_raw_eps_info) #define USB_RAW_IOCTL_EP0_STALL _IO('U', 12) #define USB_RAW_IOCTL_EP_SET_HALT _IOW('U', 13, __u32) #define USB_RAW_IOCTL_EP_CLEAR_HALT _IOW('U', 14, __u32) #define USB_RAW_IOCTL_EP_SET_WEDGE _IOW('U', 15, __u32) static int usb_raw_open() { return open("/dev/raw-gadget", O_RDWR); } static int usb_raw_init(int fd, uint32_t speed, const char* driver, const char* device) { struct usb_raw_init arg; strncpy((char*)&arg.driver_name[0], driver, sizeof(arg.driver_name)); strncpy((char*)&arg.device_name[0], device, sizeof(arg.device_name)); arg.speed = speed; return ioctl(fd, USB_RAW_IOCTL_INIT, &arg); } static int usb_raw_run(int fd) { return ioctl(fd, USB_RAW_IOCTL_RUN, 0); } static int usb_raw_configure(int fd) { return ioctl(fd, USB_RAW_IOCTL_CONFIGURE, 0); } static int usb_raw_vbus_draw(int fd, uint32_t power) { return ioctl(fd, USB_RAW_IOCTL_VBUS_DRAW, power); } static int usb_raw_ep0_write(int fd, struct usb_raw_ep_io* io) { return ioctl(fd, USB_RAW_IOCTL_EP0_WRITE, io); } static int usb_raw_ep0_read(int fd, struct usb_raw_ep_io* io) { return ioctl(fd, USB_RAW_IOCTL_EP0_READ, io); } static int usb_raw_event_fetch(int fd, struct usb_raw_event* event) { return ioctl(fd, USB_RAW_IOCTL_EVENT_FETCH, event); } static int usb_raw_ep_enable(int fd, struct usb_endpoint_descriptor* desc) { return ioctl(fd, USB_RAW_IOCTL_EP_ENABLE, desc); } static int usb_raw_ep_disable(int fd, int ep) { return ioctl(fd, USB_RAW_IOCTL_EP_DISABLE, ep); } static int usb_raw_ep0_stall(int fd) { return ioctl(fd, USB_RAW_IOCTL_EP0_STALL, 0); } static int lookup_interface(int fd, uint8_t bInterfaceNumber, uint8_t bAlternateSetting) { struct usb_device_index* index = lookup_usb_index(fd); if (!index) return -1; for (int i = 0; i < index->ifaces_num; i++) { if (index->ifaces[i].bInterfaceNumber == bInterfaceNumber && index->ifaces[i].bAlternateSetting == bAlternateSetting) return i; } return -1; } #define USB_MAX_PACKET_SIZE 4096 struct usb_raw_control_event { struct usb_raw_event inner; struct usb_ctrlrequest ctrl; char data[USB_MAX_PACKET_SIZE]; }; struct usb_raw_ep_io_data { struct usb_raw_ep_io inner; char data[USB_MAX_PACKET_SIZE]; }; static void set_interface(int fd, int n) { struct usb_device_index* index = lookup_usb_index(fd); if (!index) return; if (index->iface_cur >= 0 && index->iface_cur < index->ifaces_num) { for (int ep = 0; ep < index->ifaces[index->iface_cur].eps_num; ep++) { int rv = usb_raw_ep_disable( fd, index->ifaces[index->iface_cur].eps[ep].handle); if (rv < 0) { } else { } } } if (n >= 0 && n < index->ifaces_num) { for (int ep = 0; ep < index->ifaces[n].eps_num; ep++) { int rv = usb_raw_ep_enable(fd, &index->ifaces[n].eps[ep].desc); if (rv < 0) { } else { index->ifaces[n].eps[ep].handle = rv; } } index->iface_cur = n; } } static int configure_device(int fd) { struct usb_device_index* index = lookup_usb_index(fd); if (!index) return -1; int rv = usb_raw_vbus_draw(fd, index->bMaxPower); if (rv < 0) { return rv; } rv = usb_raw_configure(fd); if (rv < 0) { return rv; } set_interface(fd, 0); return 0; } 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) { if (!dev) { return -1; } int fd = usb_raw_open(); if (fd < 0) { return fd; } if (fd >= MAX_FDS) { close(fd); return -1; } struct usb_device_index* index = add_usb_index(fd, dev, dev_len); if (!index) { return -1; } char device[32]; sprintf(&device[0], "dummy_udc.%llu", procid); int rv = usb_raw_init(fd, speed, "dummy_udc", &device[0]); if (rv < 0) { return rv; } rv = usb_raw_run(fd); if (rv < 0) { return rv; } bool done = false; while (!done) { struct usb_raw_control_event event; event.inner.type = 0; event.inner.length = sizeof(event.ctrl); rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event); if (rv < 0) { return rv; } if (event.inner.type != USB_RAW_EVENT_CONTROL) continue; char* response_data = NULL; uint32_t response_length = 0; struct usb_qualifier_descriptor qual; if (event.ctrl.bRequestType & USB_DIR_IN) { if (!lookup_connect_response_in(fd, descs, &event.ctrl, &qual, &response_data, &response_length)) { usb_raw_ep0_stall(fd); continue; } } else { if (!lookup_connect_response_out(fd, descs, &event.ctrl, &done)) { usb_raw_ep0_stall(fd); continue; } response_data = NULL; response_length = event.ctrl.wLength; } if ((event.ctrl.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD && event.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) { rv = configure_device(fd); if (rv < 0) { return rv; } } 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; 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_raw_ep0_write(fd, (struct usb_raw_ep_io*)&response); } else { rv = usb_raw_ep0_read(fd, (struct usb_raw_ep_io*)&response); } if (rv < 0) { return rv; } } sleep_ms(200); return fd; } 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_control_io(volatile long a0, volatile long a1, volatile long a2) { int fd = a0; const struct vusb_descriptors* descs = (const struct vusb_descriptors*)a1; const struct vusb_responses* resps = (const struct vusb_responses*)a2; struct usb_raw_control_event event; event.inner.type = 0; event.inner.length = USB_MAX_PACKET_SIZE; int rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event); if (rv < 0) { return rv; } if (event.inner.type != USB_RAW_EVENT_CONTROL) { return -1; } char* response_data = NULL; uint32_t response_length = 0; if ((event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength) { if (!lookup_control_response(descs, resps, &event.ctrl, &response_data, &response_length)) { 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; int iface_index = lookup_interface(fd, iface_num, alt_set); if (iface_index < 0) { } else { set_interface(fd, iface_index); } } 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) { 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) { 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); } if (rv < 0) { return rv; } sleep_ms(200); return 0; } static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2) { if (a0 == 0xc || a0 == 0xb) { char buf[128]; sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2); return open(buf, O_RDWR, 0); } else { char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf) - 1); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 0); } } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int 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 = 0; for (;; 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 < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; memcpy((void*)0x20001040, "\x12\x01\x00\x00\x75\x16\xb7\x10\x8c\x0d\x0e\x00\x8f\x8e\x00\x18\x03" "\x01\x09\x02\x1b\x00\x01\x00\x00\x00\x00\x09\x04\x08\x00\x01\x03\x00" "\x00\x00\x09\x05", 38); memcpy((void*)0x20001066, "\x8f\xcf\x44\x20\x82\x9e\xf1\x88", 8); res = -1; res = syz_usb_connect(/*speed=*/0, /*dev_len=*/0x2d, /*dev=*/0x20001040, /*conn_descs=*/0); if (res != -1) r[0] = res; res = -1; res = syz_open_dev(/*dev=*/0xc, /*major=*/4, /*minor=*/1); if (res != -1) r[1] = res; syz_usb_control_io(/*fd=*/r[0], /*descs=*/0, /*resps=*/0); res = syscall(__NR_dup, /*oldfd=*/r[1]); if (res != -1) r[2] = res; *(uint32_t*)0x20000000 = 0xfc; memcpy( (void*)0x20000004, "\xa2\xe3\xad\x21\xed\x0d\x1b\xf9\x1b\x29\x55\x09\x87\xf7\x0e\x06\xd0\x38" "\xe7\xff\x7f\xc6\xe5\x53\x9b\x0d\x3d\x0e\x8b\x08\x9b\x3f\x3b\x09\x6c\x06" "\x08\x90\xe0\x87\x8f\x0e\x1a\xc6\xe7\x04\x9b\x09\x6e\x95\x9b\x44\x9a\x24" "\x0d\x5b\x67\xf3\x98\x8f\x7e\xf3\x19\x52\x01\x00\xff\xe8\xd1\x78\x70\x8c" "\x52\x3c\x92\x1b\x1b\x5b\x31\x07\x0b\x07\x5d\x0d\x36\xcd\x3b\x78\x13\x0d" "\xaa\x61\xd8\xe8\x04\x00\x00\x00\x58\x02\xb7\x7f\x07\x22\x72\x27\xb7\xba" "\x67\xe0\xe7\x86\x57\xa6\xf5\xc2\xa8\x74\xe6\x2a\x9c\xcd\xc0\xd3\x1a\x0c" "\x9f\x31\x8c\x0d\xa1\x99\x3b\xd1\x60\xe2\x33\xdf\x4a\x62\x17\x9c\x6f\x30" 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"\x87\xdc\x74\x6b\x08\x27\xcb\xf6\x52\xf4\x06\xc6\xb9\x5f\x27\x22\xe5\x8c" "\x05\xf7\x52\xce\x21\x26\x59\x6e\x1c\xd7\x65\x5b\x90\x48\x01\x78\x4c\x41" "\x6b\x22\xf7\x3d\x32\x46\x78\xe2\x72\x4f\x43\xf1\xfe\x68\x7c\x7e\x8a\x60" "\xc2\x8b\x82\xb6\x52\x83\x41\xb6\x48\xcd\xd5\x6f\xed\x7c\xdc\xbb\x15\x75" "\x91\x2d\x5e\xcd\x36\xde\xa3\xbc\xa0\xb7\x42\x7d\x83\x92\xc6\x28\x94\x55" "\xe8\xf8\xd2\xab\x22\x42\x72\x92\x51\xae\x03\x3a\x9e\x02\x21\x0e\x62\xdf" "\x05\x46\xa7\x4b\x33\x3a\x1c\x48\xf9\x5f\xd5\x4a\xcb\x57\x41\x25\x9e\x8c" "\x54\x88\xef\xee\xe3\x27\x41\x5c\xc1\x94\x51\x43\x2c\x6f\x14\xc2\x76\x93" "\x10\x2a\x3c\xd8\x48\x57\xcd\x65\x86\xfc\x5c\xa9\xa9\x3e\xb0\x14\x5f\xac" "\x06\x62\xff\x86\x10\x7f\x99\x8a\x8e\xf7\xdf\x8a\xa1\x40\x46\xc5\x5b\x03" "\xd3\xd4\x7f\x88\xa8\xd6\x0f\x77\x74\xa2\xee\x08\x75\x88\x97\xfb\x41\x1a" "\x94\xb3\xc2\xfc\x5d\x5f\x0d\xb4\x2c\x04\x56\xec\x01\x5f\x08\xe5\x24\x7d" "\x33\xae\x2d\x35\x60\x3f\xf8\x45\x4c\x16\xf8\x34\x28\x56\x93\x51\x25\x10" "\x2b\xb7\x84\xed\x71\x48\xb6\xce\x43\x1b\x63\xee\x35\x6b\x0c\x78\x5f\x2f" "\x47\xb9\x0e\x29\x38\x9f\x22\xfc\x5b\x59\xa7\x0e\xfa\xea\x2b\xd4\x01\x95" "\xaf\x44\x86\x22\x0d\x70\x2e\x30\xbf\xc4\x3c\x10\xec\x23\xea\x62\x83\x99" "\x4a\x7d\xde\x4d\xcb\x61\xfe\xa6\xb6\x51\xfb\x1d\x62\x45\x8d\x07\x41\xa1" "\x28\x30\x05\x2f\xcc\x46\x0d\xb0\x43\xaf\xe5\x25\x62\x9b\x40\xd7\xce\xe4" "\x58\xe4\xcb\x5e\x93\x0e\xd6\x24\x80\x6c\x43\xa0\x06\xe3\x93\x36\xd0\x7c" "\x2b\x80\x81\xc1\x28\xad\x27\x06\xf4\x82\x61\xf7\x89\x74\x84\xc2\x97\xa1" "\xa6\x61\x3b\xc1\x8f\x5a\x38\xd4\x42\x76\x8a\xf3\x80\x41\xef\xe0\x3d\x15" "\x2e\xf9\x5f\xf5\x69\xe7\x6d\xb2\x39\x1f\x45\x09\xd7\xf3\x39\xd9\x2f\xdb" "\x4a\x89\x36\x49\x49\xda\x39\x80\x00\x00\x00\x00\x00\x00\x00\xd8\x0a\x4f" "\xe6\x54\x57\x83\x76\xe5\x99\xaf\xf3\x56\x5b\x1d\x53\x1f\x30\x91\x2b\x99" "\x45\x03\x0b\x81\xea\x99\x35\xfd\x46\xed\xb4\x4a\x78\xf6\x15\x25\x54\x90" "\xa4\xb6\x21\x50\x1f\x2a\x9e\x4d\x24\x62\x4c\x4d\xac\x92\x74\x11\x8c\x67" "\x58\x4f\x5d\x37\x47\x55\x53\x4d\x7f\x68\xf6\x79\xc4\xff\x51\x6a\x9c\x86" "\x1a\x0e\x7e\x65\x86\x8f\xcb\x2b\xf1\xcb\x9a\xea\x4e\x05\xdf\x72\x27\x9f" "\xdb\x0d\x2b\x9e\x93\x5c\x5a\xf3\xcf\x47\x4b\x06\x79\xdf\xc2\x48\xc1\xf5" "\xae\xa4\xb8\xb3\x2c\x5d\x29\x5e\x57\x07\x9d\x0f\xe6\x62\xa4\x6b\x7f\x71" "\xcd\x47\x74\x4d\xb8\x6c\x50\xb7\x04\xc9\x71\xd9\x02\x95\xc7\xb2\xc7\x43" "\x9a\x2d\x78\xcc\xfa\x79\xb5\xfc\x2b\xff\x6b\xbf\x84\x02\x62\xbf\x89\x39" "\x4b\x3e\x06\x91\x95\x12\x64\xd2\x70\x0c\x83\x8f\xa2\xc7\xb3\x42\x52\x60" "\xf5\x95\x54\xe5\x02\xdc\xea\x39\xcb\x31\x3b\x00\x00\x00\x00\x00\x00\x4c" "\xa7\xc1\x2f\x45\x85\x8d\x62\x84\xca\x62\x70\xd6\xb2\xf0\xe5\x8f\xde\xd8" "\xa7\xb4\xa3\x02\xa9\x7b\xc6\x41\xdf\x07\x72\x0b\xa2\xb2\x6b\xbf\xcc\x80" "\x7c\xa0\xab\xb1\xb4\x43\x22\x26\x9c\x21\xc5\xec\x68\xcb\x06\x8e\xa8\x80" "\x67\xd9\x05\xea\x91\x7b\xb0\x3e\xef\xda\xeb\xde\xab\xf2\xd0\xdc\xe8\x09" "\x97\xc9\x15\xc8\x94\x9d\xe9\x92\x58\x7c\x2c\xb5\xfe\x36\xd7\xd3\xe5\xdb" "\x21\xb0\x94\xb8\xb7\x79\x40\xb5\xf0\x77\x22\xe4\x7a\x08\xd3\x67\xe5\xf8" "\x4c\x96\xec\x66\x4b\x72\x93\x4b\x99\xb3\x10\x9a\xf6\x5d\x77\xe8\x6a\xbd" "\x68\x59\xcd\xdf\x4b\xba\xe1\xf0\x93\x04\x62\xdf\x15\xfd\xdb\xc4\x85\x62" "\xea\x35\x11\xa8\x06\x5e\xf0\x28\xcf\x12\xf1\x4d\xcf\x6e\xbe\xcd\x8d\x98" "\x48\x36\x17\x4f\xaf\x1a\xa6\x09\xe5\xf1\xee\x11\x62\xdf\xa1\x3b\xdc\x1f" "\xa7\xcf\xaa\xdb\xa8\x5c\x72\xe9\x75\x8f\x03\xa7\x05\x00\xbe\x53\xf8\xd2" "\xa1\xdf\xb1\xc6\x8c\xc1\x64\xb0\xa0\x78\x0d\x97\x1a\x96\xea\x2c\x4d\x4c" "\xa0\x39\x8c\x22\x35\x98\x0a\x93\x07\xb3\xd5\xbd\x3b\x01\xfa\xff\xd0\xa5" "\xdb\xed\x28\x81\xa9\x70\x0a\xf5\x61\xac\x8c\x6b\x00\x00\x00\x00\x00\x00" "\x00\xf9\x6f\x06\x81\x7f\xb9\x03\x72\x9a\x7d\xb6\xff\x95\x76\x97\xc9\xed" "\xe7\x88\x5d\x94\xff\xb0\x96\x9b\xe0\xda\xf6\x0a\xf9\x31\x09\xeb\x1d\xee" "\x72\xe4\x36\x3f\x51\xaf\x62\xaf\x6f\xb2\xa6\xdf\x3b\xec\x89\x82\x2a\x7a" "\x0b\x67\x80\x58\xfa\x3f\xef\x86\xfa\xec\x21\x6e\xb6\x99\x21\x62\xf8\xdc" "\xbf\x71\x9c\x14\x8c\xd2\xf9\xc5\x5f\x49\x01\x20\x3a\x9a\x8a\x2c\x3e\x90" "\xf3\x94\x3d\xbc\x10\x36\x0a\x1a\x49\x70\x0d\x1d\xfb\xf6\x6d\x69\xf6\xfb" "\xaf\x50\x6c\x8b\xcc\xe8\xbb\x0d\x87\x2a\x02\x23\x89\x26\x40\x7a\x4e\xdd" "\xd5\xd0\xfc\x5a\x75\x2f\x90\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 4096); *(uint16_t*)0x20001004 = 0x8f5; syscall(__NR_write, /*fd=*/r[2], /*data=*/0x20000000ul, /*len=*/0x1006ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); loop(); return 0; }