blob: 7144ab855aba1969a6cbc569d8e29dc29feb94fe [file] [log] [blame]
// KASAN: use-after-free Read in ds_probe
// https://syzkaller.appspot.com/bug?id=2d87f9f3ffe216db0978f948f4d6f92c8cd87d31
// status:dup
// 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_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;
};
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 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* conn_descs =
(struct vusb_connect_descriptors*)a3;
if (!dev)
return -1;
struct usb_device_index index;
memset(&index, 0, sizeof(index));
int rv = parse_usb_descriptor(dev, dev_len, &index);
if (!rv)
return -1;
int fd = usb_fuzzer_open();
if (fd < 0)
return -1;
char device[32];
sprintf(&device[0], "dummy_udc.%llu", procid);
rv = usb_fuzzer_init(fd, speed, "dummy_udc", &device[0]);
if (rv < 0)
return -1;
rv = usb_fuzzer_run(fd);
if (rv < 0)
return -1;
bool done = false;
while (!done) {
char* response_data = NULL;
uint32_t response_length = 0;
unsigned ep;
uint8_t str_idx;
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 -1;
if (event.inner.type != USB_FUZZER_EVENT_CONTROL)
continue;
switch (event.ctrl.bRequestType & USB_TYPE_MASK) {
case USB_TYPE_STANDARD:
switch (event.ctrl.bRequest) {
case USB_REQ_GET_DESCRIPTOR:
switch (event.ctrl.wValue >> 8) {
case USB_DT_DEVICE:
response_data = (char*)index.dev;
response_length = sizeof(*index.dev);
goto reply;
case USB_DT_CONFIG:
response_data = (char*)index.config;
response_length = index.config_length;
goto reply;
case USB_DT_STRING:
str_idx = (uint8_t)event.ctrl.wValue;
if (str_idx >= conn_descs->strs_len)
goto reply;
response_data = conn_descs->strs[str_idx].str;
response_length = conn_descs->strs[str_idx].len;
goto reply;
case USB_DT_BOS:
response_data = conn_descs->bos;
response_length = conn_descs->bos_len;
goto reply;
case USB_DT_DEVICE_QUALIFIER:
response_data = conn_descs->qual;
response_length = conn_descs->qual_len;
goto reply;
default:
exit(1);
continue;
}
break;
case USB_REQ_SET_CONFIGURATION:
rv = usb_fuzzer_vbus_draw(fd, index.config->bMaxPower);
if (rv < 0)
return -1;
rv = usb_fuzzer_configure(fd);
if (rv < 0)
return -1;
for (ep = 0; ep < index.eps_num; ep++) {
rv = usb_fuzzer_ep_enable(fd, index.eps[ep]);
if (rv < 0)
exit(1);
}
done = true;
goto reply;
default:
exit(1);
continue;
}
break;
default:
exit(1);
continue;
}
struct usb_fuzzer_ep_io_data response;
reply:
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;
usb_fuzzer_ep0_write(fd, (struct usb_fuzzer_ep_io*)&response);
}
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 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 = sizeof(event.ctrl);
int rv = usb_fuzzer_ep0_read(fd, (struct usb_fuzzer_event*)&event);
if (rv < 0)
return -1;
if (event.inner.type != USB_FUZZER_EVENT_CONTROL)
return -1;
uint8_t req = event.ctrl.bRequest;
uint8_t req_type = event.ctrl.bRequestType & USB_TYPE_MASK;
uint8_t desc_type = event.ctrl.wValue >> 8;
char* response_data = NULL;
uint32_t response_length = 0;
if (req == USB_REQ_GET_DESCRIPTOR) {
int i;
int descs_num = (descs->len - offsetof(struct vusb_descriptors, descs)) /
sizeof(descs->descs[0]);
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];
goto reply;
}
}
if (descs->generic) {
response_data = &descs->generic->data[0];
response_length = descs->generic->len;
goto reply;
}
} else {
int i;
int resps_num = (resps->len - offsetof(struct vusb_responses, resps)) /
sizeof(resps->resps[0]);
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];
goto reply;
}
}
if (resps->generic) {
response_data = &resps->generic->data[0];
response_length = resps->generic->len;
goto reply;
}
}
return -1;
struct usb_fuzzer_ep_io_data response;
reply:
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;
usb_fuzzer_ep0_write(fd, (struct usb_fuzzer_ep_io*)&response);
sleep_ms(200);
return 0;
}
uint64_t r[1] = {0xffffffffffffffff};
int main(void)
{
syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
long res = 0;
*(uint8_t*)0x20000000 = 0x12;
*(uint8_t*)0x20000001 = 1;
*(uint16_t*)0x20000002 = 0;
*(uint8_t*)0x20000004 = 3;
*(uint8_t*)0x20000005 = 0x8c;
*(uint8_t*)0x20000006 = 0x39;
*(uint8_t*)0x20000007 = 8;
*(uint16_t*)0x20000008 = 0x4fa;
*(uint16_t*)0x2000000a = 0x2490;
*(uint16_t*)0x2000000c = 0x89a4;
*(uint8_t*)0x2000000e = 0;
*(uint8_t*)0x2000000f = 0;
*(uint8_t*)0x20000010 = 0;
*(uint8_t*)0x20000011 = 1;
*(uint8_t*)0x20000012 = 9;
*(uint8_t*)0x20000013 = 2;
*(uint16_t*)0x20000014 = 0x12;
*(uint8_t*)0x20000016 = 1;
*(uint8_t*)0x20000017 = 0;
*(uint8_t*)0x20000018 = 0;
*(uint8_t*)0x20000019 = 0;
*(uint8_t*)0x2000001a = 0;
*(uint8_t*)0x2000001b = 9;
*(uint8_t*)0x2000001c = 4;
*(uint8_t*)0x2000001d = 0xf9;
*(uint8_t*)0x2000001e = 0;
*(uint8_t*)0x2000001f = 0;
*(uint8_t*)0x20000020 = 0x17;
*(uint8_t*)0x20000021 = 0xc8;
*(uint8_t*)0x20000022 = 0x84;
*(uint8_t*)0x20000023 = 0;
res = syz_usb_connect(0x40000000000005, 0x24, 0x20000000, 0);
if (res != -1)
r[0] = res;
*(uint32_t*)0x20001680 = 0x54;
*(uint64_t*)0x20001684 = 0;
*(uint64_t*)0x2000168c = 0;
*(uint64_t*)0x20001694 = 0;
*(uint64_t*)0x2000169c = 0x200014c0;
*(uint8_t*)0x200014c0 = 0;
*(uint8_t*)0x200014c1 = 9;
*(uint32_t*)0x200014c2 = 0;
*(uint64_t*)0x200016a4 = 0;
*(uint64_t*)0x200016ac = 0;
*(uint64_t*)0x200016b4 = 0;
*(uint64_t*)0x200016bc = 0;
*(uint64_t*)0x200016c4 = 0;
*(uint64_t*)0x200016cc = 0;
syz_usb_control_io(r[0], 0, 0x20001680);
return 0;
}