// https://syzkaller.appspot.com/bug?id=e3984ac2adcafab62c3c67c002e6c16b759f7c1f
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static int inject_fault(int nth)
{
  int fd;
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  char buf[16];
  sprintf(buf, "%d", nth);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

static const char* setup_fault()
{
  int fd = open("/proc/self/make-it-fail", O_WRONLY);
  if (fd == -1)
    return "CONFIG_FAULT_INJECTION is not enabled";
  close(fd);
  fd = open("/proc/thread-self/fail-nth", O_WRONLY);
  if (fd == -1)
    return "kernel does not have systematic fault injection support";
  close(fd);
  static struct {
    const char* file;
    const char* val;
    bool fatal;
  } files[] = {
      {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
      {"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
  };
  unsigned i;
  for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].file, files[i].val)) {
      if (files[i].fatal)
        return "failed to write fault injection file";
    }
  }
  return NULL;
}

uint64_t r[1] = {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;
  if ((reason = setup_fault()))
    printf("the reproducer may not work as expected: fault injection setup "
           "failed: %s\n",
           reason);
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$dm_control arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6d 61 70 70 65 72 2f 63 6f 6e 74 72 6f 6c 00}
  //      (length 0x14)
  //    }
  //    flags: open_flags = 0x802 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_dm_ctl
  memcpy((void*)0x200000000440, "/dev/mapper/control\000", 20);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000440ul, /*flags=O_NONBLOCK|O_RDWR*/ 0x802,
                /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$DM_DEV_CREATE arguments: [
  //    fd: fd_dm_ctl (resource)
  //    cmd: const = 0xc138fd03 (4 bytes)
  //    arg: ptr[inout, dm_ioctl_t[dm_id_create, void, const[0, int32], const[0,
  //    int32]]] {
  //      dm_ioctl_t[dm_id_create, void, const[0, int32], const[0, int32]] {
  //        version_major: const = 0x4 (4 bytes)
  //        version_minor: const = 0x0 (4 bytes)
  //        version_patch: const = 0x0 (4 bytes)
  //        data_size: bytesize = 0x138 (4 bytes)
  //        data_start: offsetof = 0x138 (4 bytes)
  //        target_count: const = 0x0 (4 bytes)
  //        open_count: const = 0x0 (4 bytes)
  //        flags: dm_ioctl_flags = 0x20000 (4 bytes)
  //        event_nr: const = 0x0 (4 bytes)
  //        padding: const = 0x0 (4 bytes)
  //        id: dm_id_create {
  //          dev: dm_dev_number (resource)
  //          name: dm_dev_name {
  //            prefix: buffer: {73 79 7a} (length 0x3)
  //            proc: proc = 0x0 (1 bytes)
  //            slot: buffer: {32 00} (length 0x2)
  //            pad = 0x0 (122 bytes)
  //          }
  //          uuid: union dm_dev_uuid_opt {
  //            uuid: dm_dev_uuid {
  //              prefix: buffer: {43 52 50 2d 73 79 7a} (length 0x7)
  //              proc: proc = 0x0 (1 bytes)
  //              slot: buffer: {31 00} (length 0x2)
  //              pad = 0x0 (126 bytes)
  //            }
  //          }
  //        }
  //        data: buffer: {} (length 0x0)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000500 = 4;
  *(uint32_t*)0x200000000504 = 0;
  *(uint32_t*)0x200000000508 = 0;
  *(uint32_t*)0x20000000050c = 0x138;
  *(uint32_t*)0x200000000510 = 0x138;
  *(uint32_t*)0x200000000514 = 0;
  *(uint32_t*)0x200000000518 = 0;
  *(uint32_t*)0x20000000051c = 0x20000;
  *(uint32_t*)0x200000000520 = 0;
  *(uint32_t*)0x200000000524 = 0;
  memcpy((void*)0x200000000530, "syz", 3);
  *(uint8_t*)0x200000000533 = 0x61;
  memcpy((void*)0x200000000534, "2\000", 2);
  memcpy((void*)0x2000000005b0, "CRP-syz", 7);
  *(uint8_t*)0x2000000005b7 = 0x61;
  memcpy((void*)0x2000000005b8, "1\000", 2);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd03,
          /*arg=*/0x200000000500ul);
  //  ioctl$DM_TARGET_MSG arguments: [
  //    fd: fd_dm_ctl (resource)
  //    cmd: const = 0xc138fd0e (4 bytes)
  //    arg: ptr[inout, dm_ioctl_t[dm_id_lookup, dm_target_msg, const[0, int32],
  //    const[0, int32]]] {
  //      dm_ioctl_t[dm_id_lookup, dm_target_msg, const[0, int32], const[0,
  //      int32]] {
  //        version_major: const = 0x4 (4 bytes)
  //        version_minor: const = 0x0 (4 bytes)
  //        version_patch: const = 0x0 (4 bytes)
  //        data_size: bytesize = 0x180 (4 bytes)
  //        data_start: offsetof = 0x138 (4 bytes)
  //        target_count: const = 0x0 (4 bytes)
  //        open_count: const = 0x0 (4 bytes)
  //        flags: dm_ioctl_flags = 0xa0200 (4 bytes)
  //        event_nr: const = 0x0 (4 bytes)
  //        padding: const = 0x0 (4 bytes)
  //        id: union dm_id_lookup {
  //          by_name: dm_id_by_name {
  //            dev: dm_dev_number (resource)
  //            name: dm_dev_name {
  //              prefix: buffer: {73 79 7a} (length 0x3)
  //              proc: proc = 0x0 (1 bytes)
  //              slot: buffer: {32 00} (length 0x2)
  //              pad = 0x0 (122 bytes)
  //            }
  //            pad = 0x0 (136 bytes)
  //          }
  //        }
  //        data: dm_target_msg {
  //          sector: dm_sectors = 0x1000 (8 bytes)
  //          message: union dm_message {
  //            stats_create: dm_stats_create {
  //              cmd: buffer: {40 73 74 61 74 73 5f 63 72 65 61 74 65 20}
  //              (length 0xe) range: buffer: {31 30 32 34 2b 34 30 39 36}
  //              (length 0x9) sp: const = 0x20 (1 bytes) step: buffer: {2f 31
  //              36} (length 0x3) opts: buffer: {20 32 20 70 72 65 63 69 73 65
  //              5f 74 69 6d 65 73 74 61 6d 70 73 20 68 69 73 74 6f 67 72 61 6d
  //              3a 31 2c 32} (length 0x23)
  //            }
  //          }
  //          z: const = 0x0 (1 bytes)
  //        }
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000640 = 4;
  *(uint32_t*)0x200000000644 = 0;
  *(uint32_t*)0x200000000648 = 0;
  *(uint32_t*)0x20000000064c = 0x180;
  *(uint32_t*)0x200000000650 = 0x138;
  *(uint32_t*)0x200000000654 = 0;
  *(uint32_t*)0x200000000658 = 0;
  *(uint32_t*)0x20000000065c = 0xa0200;
  *(uint32_t*)0x200000000660 = 0;
  *(uint32_t*)0x200000000664 = 0;
  memcpy((void*)0x200000000670, "syz", 3);
  *(uint8_t*)0x200000000673 = 0x61;
  memcpy((void*)0x200000000674, "2\000", 2);
  *(uint64_t*)0x200000000778 = 0x1000;
  memcpy((void*)0x200000000780, "@stats_create ", 14);
  memcpy((void*)0x20000000078e, "1024+4096", 9);
  *(uint8_t*)0x200000000797 = 0x20;
  memcpy((void*)0x200000000798, "/16", 3);
  memcpy((void*)0x20000000079b, " 2 precise_timestamps histogram:1,2", 35);
  *(uint8_t*)0x2000000007be = 0;
  inject_fault(9);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd0e,
          /*arg=*/0x200000000640ul);
  return 0;
}