// https://syzkaller.appspot.com/bug?id=91321d64651784af4a63f05a545a7737bde6913e
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.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/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

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;                                                                        \
  })

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

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 void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$dm_control arguments: [
  //    fd: const = 0xffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6d 61 70 70 65 72 2f 63 6f 6e 74 72 6f 6c 00}
  //      (length 0x14)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_dm_ctl
  NONFAILING(memcpy((void*)0x2000000001c0, "/dev/mapper/control\000", 20));
  res = syscall(__NR_openat, /*fd=*/0xffffff9cul, /*file=*/0x2000000001c0ul,
                /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$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 = 0x0 (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: {31 00} (length 0x2)
  //            pad = 0x0 (122 bytes)
  //          }
  //          uuid: union dm_dev_uuid_opt {
  //            none: const = 0x0 (1 bytes)
  //          }
  //        }
  //        data: buffer: {} (length 0x0)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x200000000200 = 4);
  NONFAILING(*(uint32_t*)0x200000000204 = 0);
  NONFAILING(*(uint32_t*)0x200000000208 = 0);
  NONFAILING(*(uint32_t*)0x20000000020c = 0x138);
  NONFAILING(*(uint32_t*)0x200000000210 = 0x138);
  NONFAILING(*(uint32_t*)0x200000000214 = 0);
  NONFAILING(*(uint32_t*)0x200000000218 = 0);
  NONFAILING(*(uint32_t*)0x20000000021c = 0);
  NONFAILING(*(uint32_t*)0x200000000220 = 0);
  NONFAILING(*(uint32_t*)0x200000000224 = 0);
  NONFAILING(memcpy((void*)0x200000000230, "syz", 3));
  NONFAILING(*(uint8_t*)0x200000000233 = 0x61);
  NONFAILING(memcpy((void*)0x200000000234, "1\000", 2));
  NONFAILING(*(uint8_t*)0x2000000002b0 = 0);
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd03,
                /*arg=*/0x200000000200ul);
  if (res != -1)
    NONFAILING(r[1] = *(uint64_t*)0x200000000228);
  //  ioctl$DM_TABLE_LOAD arguments: [
  //    fd: fd_dm_ctl (resource)
  //    cmd: const = 0xc138fd09 (4 bytes)
  //    arg: ptr[inout, dm_ioctl_t[dm_id_lookup, array[dm_target, 1], len[data,
  //    int32], const[0, int32]]] {
  //      dm_ioctl_t[dm_id_lookup, array[dm_target, 1], len[data, 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 = 0x1d8 (4 bytes)
  //        data_start: offsetof = 0x138 (4 bytes)
  //        target_count: len = 0x1 (4 bytes)
  //        open_count: const = 0x0 (4 bytes)
  //        flags: dm_ioctl_flags = 0x0 (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: {31 00} (length 0x2)
  //              pad = 0x0 (122 bytes)
  //            }
  //            pad = 0x0 (136 bytes)
  //          }
  //        }
  //        data: array[dm_target] {
  //          union dm_target {
  //            crypt: dm_target_spec_t[dm_target_crypt, dm_crypt_params] {
  //              sector_start: const = 0x0 (8 bytes)
  //              length: dm_lengths = 0x2000 (8 bytes)
  //              status: const = 0x0 (4 bytes)
  //              next: bytesize = 0xa0 (4 bytes)
  //              target_type: buffer: {63 72 79 70 74 00 00 00 00 00 00 00 00
  //              00 00 00} (length 0x10) params: dm_crypt_params {
  //                cipher: buffer: {61 65 73 2d 78 74 73 2d 70 6c 61 69 6e 36
  //                34} (length 0xf) sp0: const = 0x20 (1 bytes) key: union
  //                dm_crypt_key {
  //                  fixed: buffer: {30 31 32 33 34 35 36 37 38 39 61 62 63 64
  //                  65 66 30 31 32 33 34 35 36 37 38 39 61 62 63 64 65 66 30
  //                  31 32 33 34 35 36 37 38 39 61 62 63 64 65 66 30 31 32 33
  //                  34 35 36 37 38 39 61 62 63 64 65 66} (length 0x40)
  //                }
  //                sp1: const = 0x20 (1 bytes)
  //                iv_off: buffer: {30} (length 0x1)
  //                sp2: const = 0x20 (1 bytes)
  //                dev: dm_dev_off {
  //                  dev: union dm_dev {
  //                    ram: dm_dev_proc_t["/dev/ram", 2] {
  //                      prefix: buffer: {2f 64 65 76 2f 72 61 6d} (length 0x8)
  //                      id: proc = 0x1 (1 bytes)
  //                    }
  //                  }
  //                  sp: const = 0x20 (1 bytes)
  //                  off: buffer: {30} (length 0x1)
  //                }
  //                opts: buffer: {20 31 20 69 6e 74 65 67 72 69 74 79 3a 38 3a
  //                6e 6f 6e 65} (length 0x13)
  //              }
  //              z: const = 0x0 (1 bytes)
  //            }
  //          }
  //        }
  //      }
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x200000000840 = 4);
  NONFAILING(*(uint32_t*)0x200000000844 = 0);
  NONFAILING(*(uint32_t*)0x200000000848 = 0);
  NONFAILING(*(uint32_t*)0x20000000084c = 0x1d8);
  NONFAILING(*(uint32_t*)0x200000000850 = 0x138);
  NONFAILING(*(uint32_t*)0x200000000854 = 1);
  NONFAILING(*(uint32_t*)0x200000000858 = 0);
  NONFAILING(*(uint32_t*)0x20000000085c = 0);
  NONFAILING(*(uint32_t*)0x200000000860 = 0);
  NONFAILING(*(uint32_t*)0x200000000864 = 0);
  NONFAILING(memcpy((void*)0x200000000870, "syz", 3));
  NONFAILING(*(uint8_t*)0x200000000873 = 0x61);
  NONFAILING(memcpy((void*)0x200000000874, "1\000", 2));
  NONFAILING(*(uint64_t*)0x200000000978 = 0);
  NONFAILING(*(uint64_t*)0x200000000980 = 0x2000);
  NONFAILING(*(uint32_t*)0x200000000988 = 0);
  NONFAILING(*(uint32_t*)0x20000000098c = 0xa0);
  NONFAILING(memcpy((void*)0x200000000990,
                    "crypt\000\000\000\000\000\000\000\000\000\000\000", 16));
  NONFAILING(memcpy((void*)0x2000000009a0, "aes-xts-plain64", 15));
  NONFAILING(*(uint8_t*)0x2000000009af = 0x20);
  NONFAILING(memcpy(
      (void*)0x2000000009b0,
      "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef", 64));
  NONFAILING(*(uint8_t*)0x2000000009f0 = 0x20);
  NONFAILING(memset((void*)0x2000000009f1, 48, 1));
  NONFAILING(*(uint8_t*)0x2000000009f2 = 0x20);
  NONFAILING(memcpy((void*)0x2000000009f3, "/dev/ram", 8));
  NONFAILING(*(uint8_t*)0x2000000009fb = 0x31);
  NONFAILING(*(uint8_t*)0x2000000009fc = 0x20);
  NONFAILING(memset((void*)0x2000000009fd, 48, 1));
  NONFAILING(memcpy((void*)0x2000000009fe, " 1 integrity:8:none", 19));
  NONFAILING(*(uint8_t*)0x200000000a11 = 0);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd09,
          /*arg=*/0x200000000840ul);
  //  ioctl$DM_DEV_SUSPEND arguments: [
  //    fd: fd_dm_ctl (resource)
  //    cmd: const = 0xc138fd06 (4 bytes)
  //    arg: ptr[inout, dm_ioctl_t[dm_id_lookup, void, const[0, int32], const[0,
  //    int32]]] {
  //      dm_ioctl_t[dm_id_lookup, 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 = 0x0 (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: {31 00} (length 0x2)
  //              pad = 0x0 (122 bytes)
  //            }
  //            pad = 0x0 (136 bytes)
  //          }
  //        }
  //        data: buffer: {} (length 0x0)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x200000000500 = 4);
  NONFAILING(*(uint32_t*)0x200000000504 = 0);
  NONFAILING(*(uint32_t*)0x200000000508 = 0);
  NONFAILING(*(uint32_t*)0x20000000050c = 0x138);
  NONFAILING(*(uint32_t*)0x200000000510 = 0x138);
  NONFAILING(*(uint32_t*)0x200000000514 = 0);
  NONFAILING(*(uint32_t*)0x200000000518 = 0);
  NONFAILING(*(uint32_t*)0x20000000051c = 0);
  NONFAILING(*(uint32_t*)0x200000000520 = 0);
  NONFAILING(*(uint32_t*)0x200000000524 = 0);
  NONFAILING(memcpy((void*)0x200000000530, "syz", 3));
  NONFAILING(*(uint8_t*)0x200000000533 = 0x61);
  NONFAILING(memcpy((void*)0x200000000534, "1\000", 2));
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd06,
          /*arg=*/0x200000000500ul);
  //  mknodat$dm arguments: [
  //    dirfd: const = 0xffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 64 6d 30 00} (length 0x6)
  //    }
  //    mode: const = 0x6180 (8 bytes)
  //    dev: dm_dev_number (resource)
  //  ]
  NONFAILING(memcpy((void*)0x200000000640, "./dm0\000", 6));
  syscall(__NR_mknodat, /*dirfd=*/0xffffff9cul, /*file=*/0x200000000640ul,
          /*mode=*/0x6180ul, /*dev=*/r[1]);
  //  openat$dm_dev arguments: [
  //    fd: const = 0xffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 64 6d 30 00} (length 0x6)
  //    }
  //    flags: dm_open_flags = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_dm
  NONFAILING(memcpy((void*)0x200000000680, "./dm0\000", 6));
  res = syscall(__NR_openat, /*fd=*/0xffffff9cul, /*file=*/0x200000000680ul,
                /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[2] = res;
  //  pwrite64 arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {01 02 03 04 05 06 07 08} (length 0x8)
  //    }
  //    count: len = 0x8 (8 bytes)
  //    pos: intptr = 0x0 (8 bytes)
  //  ]
  NONFAILING(
      memcpy((void*)0x2000000006c0, "\x01\x02\x03\x04\x05\x06\x07\x08", 8));
  syscall(__NR_pwrite64, /*fd=*/r[2], /*buf=*/0x2000000006c0ul, /*count=*/8ul,
          /*pos=*/0ul);
}
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;
  install_segv_handler();
  loop();
  return 0;
}