// https://syzkaller.appspot.com/bug?id=05431ab282eb8c0a336f2107744c0d05db18c1a4
// 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_fchdir
#define __NR_fchdir 133
#endif
#ifndef __NR_fsconfig
#define __NR_fsconfig 431
#endif
#ifndef __NR_fsmount
#define __NR_fsmount 432
#endif
#ifndef __NR_fsopen
#define __NR_fsopen 430
#endif
#ifndef __NR_mkdir
#define __NR_mkdir 39
#endif
#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_mount
#define __NR_mount 21
#endif
#ifndef __NR_openat
#define __NR_openat 295
#endif
#ifndef __NR_write
#define __NR_write 4
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

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

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x7ffff000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x80000000, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x81000000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  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 (4 bytes)
  //  ]
  memcpy((void*)0x80000e00, "./proc_dir\000", 11);
  syscall(
      __NR_mkdir, /*path=*/0x80000e00,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1ff);
  //  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 (4 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x80001000, "./proc_dir\000", 11);
  memcpy((void*)0x80001100, "proc\000", 5);
  syscall(__NR_mount, /*src=*/0, /*dst=*/0x80001000, /*type=*/0x80001100,
          /*flags=*/0, /*data=*/0);
  //  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*)0x80001200, "./proc_dir/net/rpc/auth.unix.ip/channel\000", 40);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x80001200,
                /*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 (4 bytes)
  //  ]
  memcpy((void*)0x80001300, "nfsd 127.0.0.1 2000000000 *\n", 28);
  syscall(__NR_write, /*fd=*/(intptr_t)r[0], /*buf=*/0x80001300,
          /*count=*/0x1c);
  //  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*)0x80000a00, "./proc_dir/net/rpc/nfsd.export/channel\000", 39);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x80000a00,
                /*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 (4 bytes)
  //  ]
  //  returns fd_fscontext
  memcpy((void*)0x80000180, "proc\000", 5);
  res = syscall(__NR_fsopen, /*type=*/0x80000180, /*flags=FSOPEN_CLOEXEC*/ 1);
  if (res != -1)
    r[2] = res;
  //  fsconfig$FSCONFIG_CMD_CREATE arguments: [
  //    fd: fd_fscontext (resource)
  //    cmd: const = 0x6 (4 bytes)
  //    key: const = 0x0 (4 bytes)
  //    value: const = 0x0 (4 bytes)
  //    aux: const = 0x0 (4 bytes)
  //  ]
  syscall(__NR_fsconfig, /*fd=*/(intptr_t)r[2], /*cmd=*/6, /*key=*/0,
          /*value=*/0, /*aux=*/0);
  //  fsmount arguments: [
  //    fs_fd: fd_fscontext (resource)
  //    flags: fsmount_flags = 0x0 (4 bytes)
  //    attr_flags: fsmount_attr_flags = 0x1 (4 bytes)
  //  ]
  //  returns fd
  res = syscall(__NR_fsmount, /*fs_fd=*/(intptr_t)r[2], /*flags=*/0,
                /*attr_flags=MOUNT_ATTR_RDONLY*/ 1);
  if (res != -1)
    r[3] = res;
  //  fchdir arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_fchdir, /*fd=*/(intptr_t)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 (4 bytes)
  //  ]
  memcpy((void*)0x80000b00, "* ./export_dir 2000000000 8194 0 0 0\n", 37);
  syscall(__NR_write, /*fd=*/(intptr_t)r[1], /*buf=*/0x80000b00,
          /*count=*/0x25);
  return 0;
}