// https://syzkaller.appspot.com/bug?id=c4117efdec586bbccac5428cce624863690bd3b8
// 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>

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

static void setup_fault()
{
  static struct {
    const char* file;
    const char* val;
    bool fatal;
  } files[] = {
      {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
      {"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
  };
  unsigned i;
  for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].file, files[i].val)) {
      if (files[i].fatal)
        exit(1);
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  setup_fault();
  intptr_t res = 0;
  syscall(__NR_perf_event_open, 0, 0, 0, -1, 0);
  syscall(__NR_kcmp, 0, 0, 6, -1, 0);
  syscall(__NR_pipe, 0);
  memcpy((void*)0x20000140, "/dev/infiniband/rdma_cm\000", 24);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000140, 2, 0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20000280 = 0;
  *(uint16_t*)0x20000284 = 0x18;
  *(uint16_t*)0x20000286 = 0xfa00;
  *(uint64_t*)0x20000288 = 0;
  *(uint64_t*)0x20000290 = 0x20000000;
  *(uint16_t*)0x20000298 = 0x13f;
  *(uint8_t*)0x2000029a = 0;
  *(uint8_t*)0x2000029b = 0;
  *(uint8_t*)0x2000029c = 0;
  *(uint8_t*)0x2000029d = 0;
  *(uint8_t*)0x2000029e = 0;
  *(uint8_t*)0x2000029f = 0;
  res = syscall(__NR_write, r[0], 0x20000280, 0x20);
  if (res != -1)
    r[1] = *(uint32_t*)0x20000000;
  syscall(__NR_write, r[0], 0, 0);
  *(uint32_t*)0x200000c0 = 3;
  *(uint16_t*)0x200000c4 = 0x40;
  *(uint16_t*)0x200000c6 = 0xfa00;
  *(uint16_t*)0x200000c8 = 2;
  *(uint16_t*)0x200000ca = htobe16(0);
  *(uint32_t*)0x200000cc = htobe32(0);
  memcpy((void*)0x200000d0,
         "\xff\xd7\x22\xdc\xe2\x0f\x92\x59\x71\x02\x78\x4b\xad\x12\xb4\xec",
         16);
  *(uint32_t*)0x200000e0 = 0;
  *(uint16_t*)0x200000e4 = 2;
  *(uint16_t*)0x200000e6 = htobe16(0);
  *(uint32_t*)0x200000e8 = htobe32(0xfffffffd);
  *(uint8_t*)0x200000ec = 0xfe;
  *(uint8_t*)0x200000ed = 0x80;
  *(uint8_t*)0x200000ee = 0;
  *(uint8_t*)0x200000ef = 0;
  *(uint8_t*)0x200000f0 = 0;
  *(uint8_t*)0x200000f1 = 0;
  *(uint8_t*)0x200000f2 = 0;
  *(uint8_t*)0x200000f3 = 0;
  *(uint8_t*)0x200000f4 = 0;
  *(uint8_t*)0x200000f5 = 0;
  *(uint8_t*)0x200000f6 = 0;
  *(uint8_t*)0x200000f7 = 0;
  *(uint8_t*)0x200000f8 = 0;
  *(uint8_t*)0x200000f9 = 0;
  *(uint8_t*)0x200000fa = 0;
  *(uint8_t*)0x200000fb = 0xaa;
  *(uint32_t*)0x200000fc = 0;
  *(uint32_t*)0x20000100 = r[1];
  *(uint32_t*)0x20000104 = 0;
  inject_fault(0);
  syscall(__NR_write, r[0], 0x200000c0, 0x48);
  return 0;
}