// https://syzkaller.appspot.com/bug?id=923fea4b7a5ce4e75e1a6dfbfcd4409fb720242e
// 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1)

#define BITMASK_LEN_OFF(type, bf_off, bf_len)                                  \
  (type)(BITMASK_LEN(type, (bf_len)) << (bf_off))

#define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len)                      \
  if ((bf_off) == 0 && (bf_len) == 0) {                                        \
    *(type*)(addr) = (type)(val);                                              \
  } else {                                                                     \
    type new_val = *(type*)(addr);                                             \
    new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len));                     \
    new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off);          \
    *(type*)(addr) = new_val;                                                  \
  }

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;
}

static int inject_fault(int nth)
{
  int fd;
  char buf[16];
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  sprintf(buf, "%d", nth + 1);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);

  *(uint32_t*)0x20346fd4 = 0;
  *(uint32_t*)0x20346fd8 = 0;
  *(uint32_t*)0x20346fdc = 0;
  *(uint32_t*)0x20346fe0 = 0xdc;
  *(uint32_t*)0x20346fe4 = 0x40;
  *(uint32_t*)0x20346fe8 = -1;
  *(uint32_t*)0x20346fec = 0;
  *(uint8_t*)0x20346ff0 = 0;
  *(uint8_t*)0x20346ff1 = 0;
  *(uint8_t*)0x20346ff2 = 0;
  *(uint8_t*)0x20346ff3 = 0;
  *(uint8_t*)0x20346ff4 = 0;
  *(uint8_t*)0x20346ff5 = 0;
  *(uint8_t*)0x20346ff6 = 0;
  *(uint8_t*)0x20346ff7 = 0;
  *(uint8_t*)0x20346ff8 = 0;
  *(uint8_t*)0x20346ff9 = 0;
  *(uint8_t*)0x20346ffa = 0;
  *(uint8_t*)0x20346ffb = 0;
  *(uint8_t*)0x20346ffc = 0;
  *(uint8_t*)0x20346ffd = 0;
  *(uint8_t*)0x20346ffe = 0;
  *(uint8_t*)0x20346fff = 0;
  syscall(__NR_bpf, 0, 0x20346fd4, 0x2c);
  *(uint32_t*)0x20b7a000 = 1;
  *(uint32_t*)0x20b7a004 = 5;
  *(uint64_t*)0x20b7a008 = 0x20346fc8;
  *(uint8_t*)0x20346fc8 = 0x18;
  STORE_BY_BITMASK(uint8_t, 0x20346fc9, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x20346fc9, 0, 4, 4);
  *(uint16_t*)0x20346fca = 0;
  *(uint32_t*)0x20346fcc = 0;
  *(uint8_t*)0x20346fd0 = 0;
  *(uint8_t*)0x20346fd1 = 0;
  *(uint16_t*)0x20346fd2 = 0;
  *(uint32_t*)0x20346fd4 = 0;
  STORE_BY_BITMASK(uint8_t, 0x20346fd8, 0x19, 0, 3);
  STORE_BY_BITMASK(uint8_t, 0x20346fd8, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, 0x20346fd8, 7, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x20346fd9, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x20346fd9, 1, 4, 4);
  *(uint16_t*)0x20346fda = 0;
  *(uint32_t*)0x20346fdc = 0;
  *(uint8_t*)0x20346fe8 = 0x95;
  *(uint8_t*)0x20346fe9 = 0;
  *(uint16_t*)0x20346fea = 0;
  *(uint32_t*)0x20346fec = 0;
  *(uint64_t*)0x20b7a010 = 0x20f6bffb;
  memcpy((void*)0x20f6bffb, "GPL", 4);
  *(uint32_t*)0x20b7a018 = 0;
  *(uint32_t*)0x20b7a01c = 0x299;
  *(uint64_t*)0x20b7a020 = 0x201a7f05;
  *(uint32_t*)0x20b7a028 = 0;
  *(uint32_t*)0x20b7a02c = 0;
  *(uint8_t*)0x20b7a030 = 0;
  *(uint8_t*)0x20b7a031 = 0;
  *(uint8_t*)0x20b7a032 = 0;
  *(uint8_t*)0x20b7a033 = 0;
  *(uint8_t*)0x20b7a034 = 0x97;
  *(uint8_t*)0x20b7a035 = 0;
  *(uint8_t*)0x20b7a036 = 0;
  *(uint8_t*)0x20b7a037 = 0;
  *(uint8_t*)0x20b7a038 = 0;
  *(uint8_t*)0x20b7a039 = 0;
  *(uint8_t*)0x20b7a03a = 0;
  *(uint8_t*)0x20b7a03b = 0;
  *(uint8_t*)0x20b7a03c = 0;
  *(uint8_t*)0x20b7a03d = 0;
  *(uint8_t*)0x20b7a03e = 0;
  *(uint8_t*)0x20b7a03f = 0;
  *(uint32_t*)0x20b7a040 = 0;
  *(uint32_t*)0x20b7a044 = 0;
  write_file("/sys/kernel/debug/failslab/ignore-gfp-wait", "N");
  write_file("/sys/kernel/debug/fail_futex/ignore-private", "N");
  inject_fault(0);
  syscall(__NR_bpf, 5, 0x20b7a000, 0x18);
  return 0;
}