// https://syzkaller.appspot.com/bug?id=cf95a10add560e71aaf41be5e7313e95b669bda6
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <setjmp.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  install_segv_handler();
  intptr_t res = 0;
  NONFAILING(memcpy(
      (void*)0x20000200,
      "-B\325NI\305j\232ppp\360\b\204\242m\000\v\030\0004\246Ey\333\321\247\261"
      "S\361:)\000\312\327Uw\000\274\3722\263\273\215\254\254va}knh#\317)"
      "\017\310\300:\234c\020d\356\251\213\0066\270G\321c\341$"
      "\377\227k\336\305\3516\335U)\3118\000\260\373\314\202n=\177="
      "\315Jx\252\217~\2710a\251\262\004K\230\223="
      "\253Q\367\005\035\241\316\213\031\352\357\343\313\201\017m;"
      "\305\363\344\307\255\260\au\367O8\0349\024b\327\fw\216\211K\223\006{"
      "H\223\262\307C\312\2577\253V\177{o{hTV0<\253\377\250\204\241F\"!["
      "\211\344/\374\0063\265h\\]\336\317xU\005\364>\352\366\357\336o1\f",
      204));
  res = syscall(__NR_memfd_create, 0x20000200ul, 0ul);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_dup, r[0]);
  if (res != -1)
    r[1] = res;
  NONFAILING(sprintf((char*)0x20000040, "0x%016llx", (long long)0));
  syscall(__NR_write, r[1], 0x20000040ul, 0x12ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000ul, 4ul, 0x11ul, r[0], 0ul);
  NONFAILING(*(uint64_t*)0x20000100 = 0);
  syscall(__NR_sendfile, r[0], r[1], 0x20000100ul, 0x220ul);
  NONFAILING(memcpy((void*)0x20000200, "cgroup.controllers\000", 19));
  res = syscall(__NR_openat, 0xffffff9c, 0x20000200ul, 0x26e1ul, 0ul);
  if (res != -1)
    r[2] = res;
  NONFAILING(memcpy((void*)0x20000080, "threaded\000", 9));
  syscall(__NR_write, r[2], 0x20000080ul, 0x11ffffce1ul);
  return 0;
}