// https://syzkaller.appspot.com/bug?id=348dc58f4919d4026770fc2911cfcc5e2a6e875a
// 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/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)) {
  }
  //  socket arguments: [
  //    domain: socket_domain = 0x2b (8 bytes)
  //    type: socket_type = 0x1 (8 bytes)
  //    proto: int32 = 0x1 (4 bytes)
  //  ]
  //  returns sock
  syscall(__NR_socket, /*domain=AF_SMC*/ 0x2bul, /*type=SOCK_STREAM*/ 1ul,
          /*proto=*/1);
  //  socket$nl_sock_diag arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x4 (4 bytes)
  //  ]
  //  returns sock_diag
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/4);
  if (res != -1)
    r[0] = res;
  //  sendmsg$SOCK_DIAG_BY_FAMILY arguments: [
  //    fd: sock_diag (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg[SOCK_DIAG_BY_FAMILY,
  //    sock_diag_req, tcpdiag_policy]]] {
  //      msghdr_netlink[netlink_msg[SOCK_DIAG_BY_FAMILY, sock_diag_req,
  //      tcpdiag_policy]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg[SOCK_DIAG_BY_FAMILY,
  //        sock_diag_req, tcpdiag_policy]]] {
  //          iovec[in, netlink_msg[SOCK_DIAG_BY_FAMILY, sock_diag_req,
  //          tcpdiag_policy]] {
  //            addr: ptr[in, netlink_msg_t[const[SOCK_DIAG_BY_FAMILY, int16],
  //            sock_diag_req, tcpdiag_policy]] {
  //              netlink_msg_t[const[SOCK_DIAG_BY_FAMILY, int16],
  //              sock_diag_req, tcpdiag_policy] {
  //                len: len = 0x18 (4 bytes)
  //                type: const = 0x14 (2 bytes)
  //                flags: netlink_msg_flags = 0x601 (2 bytes)
  //                seq: int32 = 0x3 (4 bytes)
  //                pid: int32 = 0x0 (4 bytes)
  //                payload: sock_diag_req {
  //                  sdiag_family: socket_domain = 0x2b (1 bytes)
  //                  sdiag_protocol: int8 = 0x4 (1 bytes)
  //                }
  //                attrs: array[tcpdiag_policy] {
  //                  union tcpdiag_policy {
  //                    INET_DIAG_REQ_BYTECODE:
  //                    nlattr_t[const[INET_DIAG_REQ_BYTECODE, int16],
  //                    array[int8]] {
  //                      nla_len: offsetof = 0x4 (2 bytes)
  //                      nla_type: const = 0x1 (2 bytes)
  //                      payload: buffer: {} (length 0x0)
  //                      size: buffer: {} (length 0x0)
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x18 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x4050 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4000 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000148 = 0;
  *(uint64_t*)0x200000000150 = 0x200000000080;
  *(uint64_t*)0x200000000080 = 0x200000000780;
  *(uint32_t*)0x200000000780 = 0x18;
  *(uint16_t*)0x200000000784 = 0x14;
  *(uint16_t*)0x200000000786 = 0x601;
  *(uint32_t*)0x200000000788 = 3;
  *(uint32_t*)0x20000000078c = 0;
  *(uint8_t*)0x200000000790 = 0x2b;
  *(uint8_t*)0x200000000791 = 4;
  *(uint16_t*)0x200000000792 = 4;
  *(uint16_t*)0x200000000794 = 1;
  *(uint64_t*)0x200000000088 = 0x18;
  *(uint64_t*)0x200000000158 = 1;
  *(uint64_t*)0x200000000160 = 0;
  *(uint64_t*)0x200000000168 = 0;
  *(uint32_t*)0x200000000170 = 0x4050;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000140ul,
          /*f=MSG_NOSIGNAL*/ 0x4000ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*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=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}