// https://syzkaller.appspot.com/bug?id=d4463a2d3563cdc5823b22d4e115144d0af7e88c
// 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 unsigned long long procid;

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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (4 bytes)
  //  ]
  //  returns sock_nl_generic
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
  if (res != -1)
    r[0] = res;
  //  sendmsg$nl_generic arguments: [
  //    fd: sock_nl_generic (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[netlink_random_msg_type,
  //    genlmsghdr, nl_generic_attr]]] {
  //      msghdr_netlink[netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //      nl_generic_attr]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_t[netlink_random_msg_type,
  //        genlmsghdr, nl_generic_attr]]] {
  //          iovec[in, netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //          nl_generic_attr]] {
  //            addr: ptr[in, netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //            nl_generic_attr]] {
  //              netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //              nl_generic_attr] {
  //                len: len = 0x14 (4 bytes)
  //                type: int16 = 0x25 (2 bytes)
  //                flags: netlink_msg_flags = 0x1 (2 bytes)
  //                seq: int32 = 0x70bd27 (4 bytes)
  //                pid: int32 = 0x25dfdbfe (4 bytes)
  //                payload: genlmsghdr {
  //                  cmd: int8 = 0x6 (1 bytes)
  //                  version: const = 0x0 (1 bytes)
  //                  reserved: const = 0x0 (2 bytes)
  //                }
  //                attrs: array[nl_generic_attr] {
  //                }
  //              }
  //            }
  //            len: len = 0x14 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x4000094 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x8000 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000148 = 0;
  *(uint64_t*)0x200000000150 = 0x200000006e00;
  *(uint64_t*)0x200000006e00 = 0x200000006c40;
  *(uint32_t*)0x200000006c40 = 0x14;
  *(uint16_t*)0x200000006c44 = 0x25;
  *(uint16_t*)0x200000006c46 = 1;
  *(uint32_t*)0x200000006c48 = 0x70bd27;
  *(uint32_t*)0x200000006c4c = 0x25dfdbfe;
  *(uint8_t*)0x200000006c50 = 6;
  *(uint8_t*)0x200000006c51 = 0;
  *(uint16_t*)0x200000006c52 = 0;
  *(uint64_t*)0x200000006e08 = 0x14;
  *(uint64_t*)0x200000000158 = 1;
  *(uint64_t*)0x200000000160 = 0;
  *(uint64_t*)0x200000000168 = 0;
  *(uint32_t*)0x200000000170 = 0x4000094;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000140ul,
          /*f=MSG_MORE*/ 0x8000ul);
  //  socket arguments: [
  //    domain: socket_domain = 0x2a (8 bytes)
  //    type: socket_type = 0x2 (8 bytes)
  //    proto: int32 = 0x9 (4 bytes)
  //  ]
  //  returns sock
  res = syscall(__NR_socket, /*domain=AF_QIPCRTR*/ 0x2aul,
                /*type=SOCK_DGRAM*/ 2ul, /*proto=*/9);
  if (res != -1)
    r[1] = res;
  //  getsockname$packet arguments: [
  //    fd: sock_packet (resource)
  //    addr: ptr[out, sockaddr_ll] {
  //      sockaddr_ll {
  //        sll_family: const = 0x11 (2 bytes)
  //        sll_protocol: packet_protocols = 0x0 (2 bytes)
  //        sll_ifindex: ifindex (resource)
  //        sll_hatype: const = 0x1 (2 bytes)
  //        sll_pkttype: int8 = 0x0 (1 bytes)
  //        sll_halen: const = 0x6 (1 bytes)
  //        sll_addr: union mac_addr {
  //          broadcast: buffer: (DirOut)
  //        }
  //        pad: buffer: (DirOut)
  //      }
  //    }
  //    addrlen: ptr[inout, len] {
  //      len = 0x14 (4 bytes)
  //    }
  //  ]
  *(uint32_t*)0x2000000001c0 = 0x14;
  res = syscall(__NR_getsockname, /*fd=*/r[1], /*addr=*/0x200000000180ul,
                /*addrlen=*/0x2000000001c0ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x200000000184;
  //  sendmsg$nl_route_sched arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] {
  //      msghdr_netlink[netlink_msg_route_sched] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route_sched]] {
  //          iovec[in, netlink_msg_route_sched] {
  //            addr: ptr[in, netlink_msg_route_sched] {
  //              union netlink_msg_route_sched {
  //                newqdisc: netlink_msg_t[const[RTM_NEWQDISC, int16],
  //                tcmsg[AF_UNSPEC], rtm_tca_policy] {
  //                  len: len = 0x2c (4 bytes)
  //                  type: const = 0x24 (2 bytes)
  //                  flags: netlink_msg_flags = 0xf0b (2 bytes)
  //                  seq: int32 = 0x0 (4 bytes)
  //                  pid: int32 = 0x800 (4 bytes)
  //                  payload: tcmsg[AF_UNSPEC] {
  //                    family: const = 0x0 (1 bytes)
  //                    tcm__pad1: const = 0x0 (1 bytes)
  //                    tcm__pad2: const = 0x0 (2 bytes)
  //                    ifindex: ifindex (resource)
  //                    tcm_handle: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
  //                      major: tcm_handle_offsets = 0x0 (2 bytes)
  //                    }
  //                    tcm_parent: tcm_handle {
  //                      minor: tcm_handle_offsets = 0xffff (2 bytes)
  //                      major: tcm_handle_offsets = 0xffff (2 bytes)
  //                    }
  //                    tcm_info: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
  //                      major: tcm_handle_offsets = 0x0 (2 bytes)
  //                    }
  //                  }
  //                  attrs: array[rtm_tca_policy] {
  //                    union rtm_tca_policy {
  //                      qdisc_kind_options: union qdisc_kind_options {
  //                        q_drr: nlattr_t[const[TCA_KIND, int16],
  //                        string["drr"]] {
  //                          nla_len: offsetof = 0x8 (2 bytes)
  //                          nla_type: const = 0x1 (2 bytes)
  //                          payload: buffer: {64 72 72 00} (length 0x4)
  //                          size: buffer: {} (length 0x0)
  //                        }
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x2c (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x2000000002c0 = 0;
  *(uint32_t*)0x2000000002c8 = 0;
  *(uint64_t*)0x2000000002d0 = 0x200000000280;
  *(uint64_t*)0x200000000280 = 0x200000000380;
  *(uint32_t*)0x200000000380 = 0x2c;
  *(uint16_t*)0x200000000384 = 0x24;
  *(uint16_t*)0x200000000386 = 0xf0b;
  *(uint32_t*)0x200000000388 = 0;
  *(uint32_t*)0x20000000038c = 0x800;
  *(uint8_t*)0x200000000390 = 0;
  *(uint8_t*)0x200000000391 = 0;
  *(uint16_t*)0x200000000392 = 0;
  *(uint32_t*)0x200000000394 = r[2];
  *(uint16_t*)0x200000000398 = 0;
  *(uint16_t*)0x20000000039a = 0;
  *(uint16_t*)0x20000000039c = -1;
  *(uint16_t*)0x20000000039e = -1;
  *(uint16_t*)0x2000000003a0 = 0;
  *(uint16_t*)0x2000000003a2 = 0;
  *(uint16_t*)0x2000000003a4 = 8;
  *(uint16_t*)0x2000000003a6 = 1;
  memcpy((void*)0x2000000003a8, "drr\000", 4);
  *(uint64_t*)0x200000000288 = 0x2c;
  *(uint64_t*)0x2000000002d8 = 1;
  *(uint64_t*)0x2000000002e0 = 0;
  *(uint64_t*)0x2000000002e8 = 0;
  *(uint32_t*)0x2000000002f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x2000000002c0ul,
          /*f=*/0ul);
  //  socket$netlink arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: netlink_proto = 0x0 (4 bytes)
  //  ]
  //  returns sock_netlink
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[3] = res;
  //  sendmmsg arguments: [
  //    fd: sock (resource)
  //    mmsg: ptr[in, array[send_mmsghdr]] {
  //      array[send_mmsghdr] {
  //      }
  //    }
  //    vlen: len = 0x40000000000009f (8 bytes)
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  syscall(__NR_sendmmsg, /*fd=*/r[3], /*mmsg=*/0x2000000002c0ul,
          /*vlen=*/0x40000000000009ful, /*f=*/0ul);
}
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;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}