blob: 2756f2fafb8c4549f2dd416cbcd7630a261e4fcb [file] [log] [blame]
// KMSAN: uninit-value in _mix_pool_bytes
// https://syzkaller.appspot.com/bug?id=06c43cd0a71aec08de8ea55ca5cda816c45ab4e0
// status:open
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.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/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <linux/usb/ch9.h>
unsigned long long procid;
static void sleep_ms(uint64_t ms)
{
usleep(ms * 1000);
}
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_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 == length)
break;
if (offset + 1 < length)
break;
uint8_t length = buffer[offset];
uint8_t type = buffer[offset + 1];
if (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 += 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_EP0_READ _IOWR('U', 2, struct usb_fuzzer_event)
#define USB_FUZZER_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_fuzzer_ep_io)
#define USB_FUZZER_IOCTL_EP_ENABLE _IOW('U', 4, struct usb_endpoint_descriptor)
#define USB_FUZZER_IOCTL_EP_WRITE _IOW('U', 6, struct usb_fuzzer_ep_io)
#define USB_FUZZER_IOCTL_CONFIGURE _IO('U', 8)
#define USB_FUZZER_IOCTL_VBUS_DRAW _IOW('U', 9, 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_ep0_read(int fd, struct usb_fuzzer_event* event)
{
return ioctl(fd, USB_FUZZER_IOCTL_EP0_READ, 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_ep_write(int fd, struct usb_fuzzer_ep_io* io)
{
return ioctl(fd, USB_FUZZER_IOCTL_EP_WRITE, 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 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, bool* done)
{
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 && descs->strs_len > 0) {
str_idx = descs->strs_len - 1;
}
*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;
case USB_REQ_SET_CONFIGURATION:
*response_length = 0;
*response_data = NULL;
*done = true;
return true;
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)
{
int64_t speed = a0;
int64_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_ep0_read(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;
response_found = lookup_connect_response(
descs, &index, &event.ctrl, &response_data, &response_length, &done);
if (!response_found) {
return -1;
}
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)
exit(1);
}
}
struct usb_fuzzer_ep_io_data response;
response.inner.ep = 0;
response.inner.flags = 0;
if (response_length > sizeof(response.data))
response_length = 0;
response.inner.length = response_length;
if (response_data)
memcpy(&response.data[0], response_data, response_length);
if (event.ctrl.wLength < response.inner.length)
response.inner.length = event.ctrl.wLength;
rv = usb_fuzzer_ep0_write(fd, (struct usb_fuzzer_ep_io*)&response);
if (rv < 0) {
return rv;
}
}
sleep_ms(200);
return fd;
}
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_io_response(struct vusb_descriptors* descs,
struct vusb_responses* resps,
struct usb_ctrlrequest* ctrl,
char** response_data,
uint32_t* response_length)
{
int descs_num = (descs->len - offsetof(struct vusb_descriptors, descs)) /
sizeof(descs->descs[0]);
int 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->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->generic) {
*response_data = &resps->generic->data[0];
*response_length = resps->generic->len;
return true;
}
}
return false;
}
static volatile long syz_usb_control_io(volatile long a0, volatile long a1,
volatile long a2)
{
int fd = a0;
struct vusb_descriptors* descs = (struct vusb_descriptors*)a1;
struct vusb_responses* resps = (struct vusb_responses*)a2;
struct usb_fuzzer_control_event event;
event.inner.type = 0;
event.inner.length = USB_MAX_PACKET_SIZE;
int rv = usb_fuzzer_ep0_read(fd, (struct usb_fuzzer_event*)&event);
if (rv < 0) {
return rv;
}
if (event.inner.type != USB_FUZZER_EVENT_CONTROL) {
return -1;
}
if (!(event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength != 0) {
}
bool response_found = false;
char* response_data = NULL;
uint32_t response_length = 0;
response_found = lookup_control_io_response(descs, resps, &event.ctrl,
&response_data, &response_length);
if (!response_found) {
return -1;
}
struct usb_fuzzer_ep_io_data response;
response.inner.ep = 0;
response.inner.flags = 0;
if (response_length > sizeof(response.data))
response_length = 0;
response.inner.length = response_length;
if (response_data)
memcpy(&response.data[0], response_data, response_length);
if (event.ctrl.wLength < response.inner.length)
response.inner.length = event.ctrl.wLength;
rv = usb_fuzzer_ep0_write(fd, (struct usb_fuzzer_ep_io*)&response);
if (rv < 0) {
return rv;
}
sleep_ms(200);
return 0;
}
static void setup_common()
{
if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
}
}
static void loop();
static void sandbox_common()
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setpgrp();
setsid();
struct rlimit rlim;
rlim.rlim_cur = rlim.rlim_max = (200 << 20);
setrlimit(RLIMIT_AS, &rlim);
rlim.rlim_cur = rlim.rlim_max = 32 << 20;
setrlimit(RLIMIT_MEMLOCK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 136 << 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);
if (unshare(CLONE_NEWNS)) {
}
if (unshare(CLONE_NEWIPC)) {
}
if (unshare(0x02000000)) {
}
if (unshare(CLONE_NEWUTS)) {
}
if (unshare(CLONE_SYSVSEM)) {
}
typedef struct {
const char* name;
const char* value;
} sysctl_t;
static const sysctl_t sysctls[] = {
{"/proc/sys/kernel/shmmax", "16777216"},
{"/proc/sys/kernel/shmall", "536870912"},
{"/proc/sys/kernel/shmmni", "1024"},
{"/proc/sys/kernel/msgmax", "8192"},
{"/proc/sys/kernel/msgmni", "1024"},
{"/proc/sys/kernel/msgmnb", "1024"},
{"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
};
unsigned i;
for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
write_file(sysctls[i].name, sysctls[i].value);
}
int wait_for_loop(int pid)
{
if (pid < 0)
exit(1);
int status = 0;
while (waitpid(-1, &status, __WALL) != pid) {
}
return WEXITSTATUS(status);
}
static int do_sandbox_none(void)
{
if (unshare(CLONE_NEWPID)) {
}
int pid = fork();
if (pid != 0)
return wait_for_loop(pid);
setup_common();
sandbox_common();
if (unshare(CLONE_NEWNET)) {
}
loop();
exit(1);
}
static void close_fds()
{
int fd;
for (fd = 3; fd < 30; fd++)
close(fd);
}
uint64_t r[1] = {0xffffffffffffffff};
void loop(void)
{
intptr_t res = 0;
*(uint8_t*)0x20000040 = 0x12;
*(uint8_t*)0x20000041 = 1;
*(uint16_t*)0x20000042 = 0;
*(uint8_t*)0x20000044 = 0xc4;
*(uint8_t*)0x20000045 = -1;
*(uint8_t*)0x20000046 = 0x41;
*(uint8_t*)0x20000047 = 8;
*(uint16_t*)0x20000048 = 0xbda;
*(uint16_t*)0x2000004a = 0x8150;
*(uint16_t*)0x2000004c = 0x31ce;
*(uint8_t*)0x2000004e = 0;
*(uint8_t*)0x2000004f = 0;
*(uint8_t*)0x20000050 = 0;
*(uint8_t*)0x20000051 = 1;
*(uint8_t*)0x20000052 = 9;
*(uint8_t*)0x20000053 = 2;
*(uint16_t*)0x20000054 = 0x12;
*(uint8_t*)0x20000056 = 1;
*(uint8_t*)0x20000057 = 0;
*(uint8_t*)0x20000058 = 0;
*(uint8_t*)0x20000059 = 0;
*(uint8_t*)0x2000005a = 0;
*(uint8_t*)0x2000005b = 9;
*(uint8_t*)0x2000005c = 4;
*(uint8_t*)0x2000005d = 0xfe;
*(uint8_t*)0x2000005e = 0;
*(uint8_t*)0x2000005f = 0;
*(uint8_t*)0x20000060 = 0xa2;
*(uint8_t*)0x20000061 = 0x39;
*(uint8_t*)0x20000062 = 0xb;
*(uint8_t*)0x20000063 = 0;
res = syz_usb_connect(0, 0x24, 0x20000040, 0);
if (res != -1)
r[0] = res;
*(uint32_t*)0x20000d80 = 0x34;
*(uint64_t*)0x20000d84 = 0;
*(uint64_t*)0x20000d8c = 0;
*(uint64_t*)0x20000d94 = 0;
*(uint64_t*)0x20000d9c = 0;
*(uint64_t*)0x20000da4 = 0;
*(uint64_t*)0x20000dac = 0;
*(uint32_t*)0x20001080 = 0x54;
*(uint64_t*)0x20001084 = 0x20000dc0;
memcpy((void*)0x20000dc0, "\x00\x1f\x46", 3);
*(uint64_t*)0x2000108c = 0;
*(uint64_t*)0x20001094 = 0;
*(uint64_t*)0x2000109c = 0;
*(uint64_t*)0x200010a4 = 0;
*(uint64_t*)0x200010ac = 0;
*(uint64_t*)0x200010b4 = 0;
*(uint64_t*)0x200010bc = 0;
*(uint64_t*)0x200010c4 = 0;
*(uint64_t*)0x200010cc = 0;
syz_usb_control_io(r[0], 0x20000d80, 0x20001080);
close_fds();
}
int main(void)
{
syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
do_sandbox_none();
return 0;
}