// https://syzkaller.appspot.com/bug?id=e7d3a1ff85f2161580f6474aa29d5a34228a6429
// 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>

#ifndef __NR_ioctl
#define __NR_ioctl 29
#endif
#ifndef __NR_mkdirat
#define __NR_mkdirat 34
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_mount
#define __NR_mount 40
#endif
#ifndef __NR_openat
#define __NR_openat 56
#endif
#ifndef __NR_sendmsg
#define __NR_sendmsg 211
#endif
#ifndef __NR_write
#define __NR_write 64
#endif

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 long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    unsigned long nb = a1;
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(nb % 10);
      nb /= 10;
    }
    return open(buf, a2 & ~O_CREAT, 0);
  }
}

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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 64 65 62 75 67 00} (length 0x8)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x20000000, "./debug\000", 8);
  syscall(
      __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x20000000ul,
      /*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 64 65 62 75 67 00} (length 0x8)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {64 65 62 75 67 66 73 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x20000080, "./debug\000", 8);
  memcpy((void*)0x200000c0, "debugfs\000", 8);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x20000080ul, /*type=*/0x200000c0ul,
          /*flags=*/0ul, /*data=*/0ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 64 65 62 75 67 2f 64 79 6e 61 6d 69 63 5f 64 65 62 75
  //      67 2f 63 6f 6e 74 72 6f 6c 00} (length 0x1e)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x20000080, "./debug/dynamic_debug/control\000", 30);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000080ul,
                /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {2b 70} (length 0x2)
  //    }
  //    count: len = 0x2 (8 bytes)
  //  ]
  memcpy((void*)0x20000100, "+p", 2);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x20000100ul, /*count=*/2ul);
  //  syz_open_dev$dvb_frontend arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 64 76 62 2f 61 64 61 70 74 65 72 23 2f 66 72
  //      6f 6e 74 65 6e 64 23 00} (length 0x1c)
  //    }
  //    id: intptr = 0x0 (8 bytes)
  //    flags: open_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_dvb_frontend
  memcpy((void*)0x20000080, "/dev/dvb/adapter#/frontend#\000", 28);
  res = -1;
  res = syz_open_dev(/*dev=*/0x20000080, /*id=*/0, /*flags=*/0);
  if (res != -1)
    r[1] = res;
  //  sendmsg$can_bcm arguments: [
  //    fd: sock_can_bcm (resource)
  //    msg: ptr[in, msghdr_can[can_bcm_msg]] {
  //      msghdr_can[can_bcm_msg] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: nil
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x20000080 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x410 (8 bytes)
  //  ]
  *(uint64_t*)0x20000180 = 0;
  *(uint32_t*)0x20000188 = 0;
  *(uint64_t*)0x20000190 = 0;
  *(uint64_t*)0x20000198 = 1;
  *(uint64_t*)0x200001a0 = 0;
  *(uint64_t*)0x200001a8 = 0;
  *(uint32_t*)0x200001b0 = 0x20000080;
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x20000180ul,
          /*f=MSG_PROBE|0x400*/ 0x410ul);
  //  ioctl$FE_GET_PROPERTY arguments: [
  //    fd: fd_dvb_frontend (resource)
  //    cmd: const = 0x80106f53 (4 bytes)
  //    arg: ptr[inout, dtv_properties] {
  //      dtv_properties {
  //        num: int32 = 0x2 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        props: ptr[in, array[dtv_property]] {
  //          array[dtv_property] {
  //            dtv_property {
  //              cmd: dtv_property_cmd = 0x3c (4 bytes)
  //              reserved: buffer: {00 00 00 00 00 00 00 00 00 00 00 00}
  //              (length 0xc) u: union dtv_property_u {
  //                data: int32 = 0xce (4 bytes)
  //              }
  //              result: int32 = 0x3 (4 bytes)
  //            }
  //            dtv_property {
  //              cmd: dtv_property_cmd = 0x45 (4 bytes)
  //              reserved: buffer: {00 00 00 00 00 00 00 00 00 00 00 00}
  //              (length 0xc) u: union dtv_property_u {
  //                data: int32 = 0x80000000 (4 bytes)
  //              }
  //              result: int32 = 0x1c (4 bytes)
  //            }
  //          }
  //        }
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000c0 = 2;
  *(uint64_t*)0x200000c8 = 0x20000180;
  *(uint32_t*)0x20000180 = 0x3c;
  memset((void*)0x20000184, 0, 12);
  *(uint32_t*)0x20000190 = 0xce;
  *(uint32_t*)0x200001c8 = 3;
  *(uint32_t*)0x200001cc = 0x45;
  memset((void*)0x200001d0, 0, 12);
  *(uint32_t*)0x200001dc = 0x80000000;
  *(uint32_t*)0x20000214 = 0x1c;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x80106f53, /*arg=*/0x200000c0ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*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;
}