// https://syzkaller.appspot.com/bug?id=f29750d7805751d874d3c03945040eed4e5cc6a7
// 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>

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
      (addr < prog_start || addr > prog_end)) {
    _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(...)                                                        \
  {                                                                            \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    }                                                                          \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
  }

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

uint64_t r[2] = {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;
  res = syscall(__NR_socket, 2ul, 1ul, 0);
  if (res != -1)
    r[0] = res;
  NONFAILING(memcpy((void*)0x20000140,
                    "-B\325NI\305j\272ppp\360\b\204\242m\000:)"
                    "\000\273\215\254\254va}knh#\313)\017\310\300:"
                    "\234c\020d\356\251\213Cc\255\211\234k\336\305\3516\335U"
                    "\251=\315Jx\252\217~\2710\213\031\352\357\343\253\266\245$"
                    "4\326\3767\017\347\331$\316 "
                    "\253N\256\311\275\323g@\341\'s\016\220\362\315r\270("
                    "\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
                    "\000",
                    118));
  res = syscall(__NR_memfd_create, 0x20000140ul, 0ul);
  if (res != -1)
    r[1] = res;
  NONFAILING(memcpy((void*)0x200004c0, "1", 1));
  syscall(__NR_write, r[1], 0x200004c0ul, 1ul);
  syscall(__NR_mmap, 0x20000000ul, 0x2000ul, 4ul, 0x11ul, r[1], 0ul);
  NONFAILING(*(uint64_t*)0x20000240 = 0);
  syscall(__NR_sendfile, r[1], r[1], 0x20000240ul, 0xba8ul);
  NONFAILING(*(uint32_t*)0x20000040 = 0);
  syscall(__NR_getsockopt, r[0], 0, 0x50, 0ul, 0x20000040ul);
  return 0;
}