// https://syzkaller.appspot.com/bug?id=80ce071ba4a98245e60afb5fd26ffd548b503268
// 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/mount.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#ifndef __NR_fsconfig
#define __NR_fsconfig 431
#endif
#ifndef __NR_fsmount
#define __NR_fsmount 432
#endif
#ifndef __NR_fsopen
#define __NR_fsopen 430
#endif

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*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=*/0x200001000000ul, /*len=*/0x1000, /*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)) {
  }
  //  mkdir arguments: [
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 5f 64 69 72 00} (length 0xb)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000e00, "./proc_dir\000", 11);
  syscall(
      __NR_mkdir, /*path=*/0x200000000e00ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 5f 64 69 72 00} (length 0xb)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {70 72 6f 63 00} (length 0x5)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x200000001000, "./proc_dir\000", 11);
  memcpy((void*)0x200000001100, "proc\000", 5);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000001000ul,
          /*type=*/0x200000001100ul, /*flags=*/0ul, /*data=*/0ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 5f 64 69 72 2f 6e 65 74 2f 72 70 63 2f 61
  //      75 74 68 2e 75 6e 69 78 2e 69 70 2f 63 68 61 6e 6e 65 6c 00} (length
  //      0x28)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000001200, "./proc_dir/net/rpc/auth.unix.ip/channel\000",
         40);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000001200ul,
                /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {6e 66 73 64 20 31 32 37 2e 30 2e 30 2e 31 20 32 30 30 30 30
  //      30 30 30 30 30 20 2a 0a} (length 0x1c)
  //    }
  //    count: len = 0x1c (8 bytes)
  //  ]
  memcpy((void*)0x200000001300, "nfsd 127.0.0.1 2000000000 *\n", 28);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000001300ul, /*count=*/0x1cul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 5f 64 69 72 2f 6e 65 74 2f 72 70 63 2f 6e
  //      66 73 64 2e 65 78 70 6f 72 74 2f 63 68 61 6e 6e 65 6c 00} (length
  //      0x27)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000a00, "./proc_dir/net/rpc/nfsd.export/channel\000",
         39);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000a00ul,
                /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[1] = res;
  //  fsopen arguments: [
  //    type: ptr[in, buffer] {
  //      buffer: {70 72 6f 63 00} (length 0x5)
  //    }
  //    flags: fsopen_flags = 0x1 (8 bytes)
  //  ]
  //  returns fd_fscontext
  memcpy((void*)0x200000000180, "proc\000", 5);
  res = syscall(__NR_fsopen, /*type=*/0x200000000180ul,
                /*flags=FSOPEN_CLOEXEC*/ 1ul);
  if (res != -1)
    r[2] = res;
  //  fsconfig$FSCONFIG_CMD_CREATE arguments: [
  //    fd: fd_fscontext (resource)
  //    cmd: const = 0x6 (8 bytes)
  //    key: const = 0x0 (8 bytes)
  //    value: const = 0x0 (8 bytes)
  //    aux: const = 0x0 (8 bytes)
  //  ]
  syscall(__NR_fsconfig, /*fd=*/r[2], /*cmd=*/6ul, /*key=*/0ul, /*value=*/0ul,
          /*aux=*/0ul);
  //  fsmount arguments: [
  //    fs_fd: fd_fscontext (resource)
  //    flags: fsmount_flags = 0x0 (8 bytes)
  //    attr_flags: fsmount_attr_flags = 0x1 (8 bytes)
  //  ]
  //  returns fd
  res = syscall(__NR_fsmount, /*fs_fd=*/r[2], /*flags=*/0ul,
                /*attr_flags=MOUNT_ATTR_RDONLY*/ 1ul);
  if (res != -1)
    r[3] = res;
  //  fchdir arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_fchdir, /*fd=*/r[3]);
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {2a 20 2e 2f 65 78 70 6f 72 74 5f 64 69 72 20 32 30 30 30 30
  //      30 30 30 30 30 20 38 31 39 34 20 30 20 30 20 30 0a} (length 0x25)
  //    }
  //    count: len = 0x25 (8 bytes)
  //  ]
  memcpy((void*)0x200000000b00, "* ./export_dir 2000000000 8194 0 0 0\n", 37);
  syscall(__NR_write, /*fd=*/r[1], /*buf=*/0x200000000b00ul, /*count=*/0x25ul);
  return 0;
}