// https://syzkaller.appspot.com/bug?id=650f29599f90395d4190195e5b5a3aec7beb7af2
// 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 279
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_setgroups
#define __NR_setgroups 159
#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[1] = {0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  install_segv_handler();
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  memfd_create arguments: [
  //    name: ptr[in, buffer] {
  //      buffer: {ff 2d 42 d5 4e 49 c5 6a 9a 70 70 70 f0 08 84 a2 6d 00 0b 18
  //      00 34 a2 45 79 db d1 a7 b1 53 f1 3a 29 00 bb 8d ac c8 c0 3a 9c 63 02
  //      64 ee a9 8f 63 63 ad 89 9c 6b de 05 00 00 00 55 45 c9 38 4d cd fb cc
  //      97 b4 0b a9 3d cd 4a 78 aa 8f 7e b9 30 61 a9 b2 04 4b 98 93 3d 88 00
  //      f7 d6 1d a1 ce 8b 19 ea ef e3 ab 00 a5 c2 34 d6 fe 37 0f} (length
  //      0x6c)
  //    }
  //    flags: memfd_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_memfd
  NONFAILING(memcpy(
      (void*)0x20000140,
      "\377-"
      "B\325NI\305j\232ppp\360\b\204\242m\000\v\030\0004\242Ey\333\321\247\261S"
      "\361:)\000\273\215\254\310\300:"
      "\234c\002d\356\251\217cc\255\211\234k\336\005\000\000\000UE\3118M\315"
      "\373\314\227\264\v\251=\315Jx\252\217~\2710a\251\262\004K\230\223="
      "\210\000\367\326\035\241\316\213\031\352\357\343\253\000\245\3024\326"
      "\3767\017",
      108));
  res = syscall(__NR_memfd_create, /*name=*/0x20000140ul, /*flags=*/0ul);
  if (res != -1)
    r[0] = res;
  //  mmap arguments: [
  //    addr: VMA[0x4000]
  //    len: len = 0x4000 (8 bytes)
  //    prot: mmap_prot = 0x4 (8 bytes)
  //    flags: mmap_flags = 0x11 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0x0 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x4000ul,
          /*prot=PROT_EXEC*/ 4ul, /*flags=MAP_FIXED|MAP_SHARED*/ 0x11ul,
          /*fd=*/r[0], /*offset=*/0ul);
  //  setgroups arguments: [
  //    size: len = 0x1 (8 bytes)
  //    list: ptr[in, array[gid]] {
  //      array[gid] {
  //        gid (resource)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x20000200 = 0);
  syscall(__NR_setgroups, /*size=*/1ul, /*list=*/0x20000200ul);
  return 0;
}