// https://syzkaller.appspot.com/bug?id=f291840edb89cf5710bde3b8abd6021687077d6c
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.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_dup
#define __NR_dup 23
#endif
#ifndef __NR_ioctl
#define __NR_ioctl 29
#endif
#ifndef __NR_madvise
#define __NR_madvise 233
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_openat
#define __NR_openat 56
#endif

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 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;
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$nullb arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 75 6c 6c 62 30 00} (length 0xc)
  //    }
  //    flags: open_flags = 0x169802 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_block
  memcpy((void*)0x20001000, "/dev/nullb0\000", 12);
  res = syscall(
      __NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20001000ul,
      /*flags=O_SYNC|O_NONBLOCK|O_NOFOLLOW|O_NOATIME|O_LARGEFILE|O_RDWR*/
      0x169802, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$BLKBSZSET arguments: [
  //    fd: fd_block (resource)
  //    cmd: const = 0x40081271 (4 bytes)
  //    arg: ptr[in, intptr] {
  //      intptr = 0x10000 (8 bytes)
  //    }
  //  ]
  *(uint64_t*)0x20000100 = 0x10000;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x40081271, /*arg=*/0x20000100ul);
  //  openat$nullb arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 75 6c 6c 62 30 00} (length 0xc)
  //    }
  //    flags: open_flags = 0x282 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_block
  memcpy((void*)0x20000000, "/dev/nullb0\000", 12);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000000ul,
                /*flags=O_TRUNC|O_EXCL|O_RDWR*/ 0x282, /*mode=*/0);
  if (res != -1)
    r[1] = res;
  //  dup arguments: [
  //    oldfd: fd (resource)
  //  ]
  //  returns fd
  res = syscall(__NR_dup, /*oldfd=*/r[1]);
  if (res != -1)
    r[2] = res;
  //  mmap arguments: [
  //    addr: VMA[0xb36000]
  //    len: len = 0xb36000 (8 bytes)
  //    prot: mmap_prot = 0x2000007 (8 bytes)
  //    flags: mmap_flags = 0x38011 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0x0 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0xb36000ul,
          /*prot=PROT_GROWSUP|PROT_WRITE|PROT_READ|PROT_EXEC*/ 0x2000007ul,
          /*flags=MAP_STACK|MAP_POPULATE|MAP_NONBLOCK|MAP_FIXED|0x1*/ 0x38011ul,
          /*fd=*/r[2], /*offset=*/0ul);
  //  madvise arguments: [
  //    addr: VMA[0x800000]
  //    len: len = 0x800000 (8 bytes)
  //    advice: madvise_flags = 0xe (8 bytes)
  //  ]
  syscall(__NR_madvise, /*addr=*/0x20000000ul, /*len=*/0x800000ul,
          /*advice=MADV_HUGEPAGE*/ 0xeul);
  //  madvise arguments: [
  //    addr: VMA[0xc00000]
  //    len: len = 0xc00000 (8 bytes)
  //    advice: madvise_flags = 0x64 (8 bytes)
  //  ]
  syscall(__NR_madvise, /*addr=*/0x20000000ul, /*len=*/0xc00000ul,
          /*advice=MADV_HWPOISON*/ 0x64ul);
  return 0;
}