// https://syzkaller.appspot.com/bug?id=23823e410046582a6423e494c0a3f7c94758dc93
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.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 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[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$dm_control arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6d 61 70 70 65 72 2f 63 6f 6e 74 72 6f 6c 00}
  //      (length 0x14)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_dm_ctl
  memcpy((void*)0x2000000003c0, "/dev/mapper/control\000", 20);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x2000000003c0ul, /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$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: {32 00} (length 0x2)
  //            pad = 0x0 (122 bytes)
  //          }
  //          uuid: union dm_dev_uuid_opt {
  //            none: const = 0x0 (1 bytes)
  //          }
  //        }
  //        data: buffer: {} (length 0x0)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000400 = 4;
  *(uint32_t*)0x200000000404 = 0;
  *(uint32_t*)0x200000000408 = 0;
  *(uint32_t*)0x20000000040c = 0x138;
  *(uint32_t*)0x200000000410 = 0x138;
  *(uint32_t*)0x200000000414 = 0;
  *(uint32_t*)0x200000000418 = 0;
  *(uint32_t*)0x20000000041c = 0;
  *(uint32_t*)0x200000000420 = 0;
  *(uint32_t*)0x200000000424 = 0;
  memcpy((void*)0x200000000430, "syz", 3);
  *(uint8_t*)0x200000000433 = 0x61;
  memcpy((void*)0x200000000434, "2\000", 2);
  *(uint8_t*)0x2000000004b0 = 0;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd03,
          /*arg=*/0x200000000400ul);
  //  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 = 0x1c8 (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: {32 00} (length 0x2)
  //              pad = 0x0 (122 bytes)
  //            }
  //            pad = 0x0 (136 bytes)
  //          }
  //        }
  //        data: array[dm_target] {
  //          union dm_target {
  //            cache: dm_target_spec_t[dm_target_cache, dm_cache_params] {
  //              sector_start: const = 0x0 (8 bytes)
  //              length: dm_lengths = 0x3fffffffffffff (8 bytes)
  //              status: const = 0x0 (4 bytes)
  //              next: bytesize = 0x90 (4 bytes)
  //              target_type: buffer: {63 61 63 68 65 00 00 00 00 00 00 00 00
  //              00 00 00} (length 0x10) params: dm_cache_params {
  //                meta: 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)
  //                  }
  //                }
  //                sp0: const = 0x20 (1 bytes)
  //                cache: union dm_dev {
  //                  ram_num: dm_ram_num {
  //                    major: buffer: {31 3a} (length 0x2)
  //                    minor: proc = 0x0 (20 bytes)
  //                  }
  //                }
  //                sp1: const = 0x20 (1 bytes)
  //                origin: 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 = 0x0 (1 bytes)
  //                  }
  //                }
  //                sp2: const = 0x20 (1 bytes)
  //                bsize: buffer: {31 32 38} (length 0x3)
  //                sp3: const = 0x20 (1 bytes)
  //                feat: buffer: {31 20 6e 6f 5f 64 69 73 63 61 72 64 5f 70 61
  //                73 73 64 6f 77 6e} (length 0x15) sp4: const = 0x20 (1 bytes)
  //                policy: buffer: {73 6d 71 20 32 20 6d 69 67 72 61 74 69 6f
  //                6e 5f 74 68 72 65 73 68 6f 6c 64 20 31 30 32 34} (length
  //                0x1e)
  //              }
  //              z: const = 0x0 (1 bytes)
  //            }
  //          }
  //        }
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000000 = 4;
  *(uint32_t*)0x200000000004 = 0;
  *(uint32_t*)0x200000000008 = 0;
  *(uint32_t*)0x20000000000c = 0x1c8;
  *(uint32_t*)0x200000000010 = 0x138;
  *(uint32_t*)0x200000000014 = 1;
  *(uint32_t*)0x200000000018 = 0;
  *(uint32_t*)0x20000000001c = 0;
  *(uint32_t*)0x200000000020 = 0;
  *(uint32_t*)0x200000000024 = 0;
  memcpy((void*)0x200000000030, "syz", 3);
  *(uint8_t*)0x200000000033 = 0x61;
  memcpy((void*)0x200000000034, "2\000", 2);
  *(uint64_t*)0x200000000138 = 0;
  *(uint64_t*)0x200000000140 = 0x3fffffffffffff;
  *(uint32_t*)0x200000000148 = 0;
  *(uint32_t*)0x20000000014c = 0x90;
  memcpy((void*)0x200000000150,
         "cache\000\000\000\000\000\000\000\000\000\000\000", 16);
  memcpy((void*)0x200000000160, "/dev/ram", 8);
  *(uint8_t*)0x200000000168 = 0x31;
  *(uint8_t*)0x200000000169 = 0x20;
  memcpy((void*)0x20000000016a, "1:", 2);
  sprintf((char*)0x20000000016c, "%020llu", (long long)0);
  *(uint8_t*)0x200000000180 = 0x20;
  memcpy((void*)0x200000000181, "/dev/ram", 8);
  *(uint8_t*)0x200000000189 = 0x30;
  *(uint8_t*)0x20000000018a = 0x20;
  memcpy((void*)0x20000000018b, "128", 3);
  *(uint8_t*)0x20000000018e = 0x20;
  memcpy((void*)0x20000000018f, "1 no_discard_passdown", 21);
  *(uint8_t*)0x2000000001a4 = 0x20;
  memcpy((void*)0x2000000001a5, "smq 2 migration_threshold 1024", 30);
  *(uint8_t*)0x2000000001c3 = 0;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd09,
          /*arg=*/0x200000000000ul);
}
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;
  loop();
  return 0;
}