// 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/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 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[2] = {0xffffffffffffffff, 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[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {14 00 00 00 26 00 09 00 01 00 08 00 80
  //                  00 00 00 06 00 00 00 36 d7 23 eb cb 1d 05 90 90 7d 0a a3
  //                  9e 1c eb ba d7 b6 6e 16 06 74 3d f7 85 16 3c f7 9b e4 b0
  //                  99 cd cd 98 2d 2c 50 16 b1 fd 74 8c 54 92 b3 c0 a9 90 4e
  //                  eb f4 e6 8c 27 99 40 5f f8 71 a7 f0 48 aa 6b ec 46 39 d4
  //                  e8 66 a0 3a a4 20 48 b0 22 9e 17 ec 80 82 7f fc 70 c4 f3
  //                  e6 c0 8e fc 0b 6f 62 a1 6e 39 37 64 92 c2 1e 41 4d 37 75
  //                  d0 6f 4f 4d 46 1a 41 73 2f f5 1b 4f 17 0e 0d fb b8 0b 32
  //                  77 10 bc 06 92 6b 34 4b 2c e7 6b 25 64 06 5b d9 bd df e5
  //                  66 66 70 45} (length 0xa9)
  //                }
  //              }
  //            }
  //            len: len = 0x14 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x400c801 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4000000 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000100 = 0;
  *(uint32_t*)0x200000000108 = 0;
  *(uint64_t*)0x200000000110 = 0x200000000180;
  *(uint64_t*)0x200000000180 = 0x200000000000;
  memcpy((void*)0x200000000000,
         "\x14\x00\x00\x00\x26\x00\x09\x00\x01\x00\x08\x00\x80\x00\x00\x00\x06"
         "\x00\x00\x00\x36\xd7\x23\xeb\xcb\x1d\x05\x90\x90\x7d\x0a\xa3\x9e\x1c"
         "\xeb\xba\xd7\xb6\x6e\x16\x06\x74\x3d\xf7\x85\x16\x3c\xf7\x9b\xe4\xb0"
         "\x99\xcd\xcd\x98\x2d\x2c\x50\x16\xb1\xfd\x74\x8c\x54\x92\xb3\xc0\xa9"
         "\x90\x4e\xeb\xf4\xe6\x8c\x27\x99\x40\x5f\xf8\x71\xa7\xf0\x48\xaa\x6b"
         "\xec\x46\x39\xd4\xe8\x66\xa0\x3a\xa4\x20\x48\xb0\x22\x9e\x17\xec\x80"
         "\x82\x7f\xfc\x70\xc4\xf3\xe6\xc0\x8e\xfc\x0b\x6f\x62\xa1\x6e\x39\x37"
         "\x64\x92\xc2\x1e\x41\x4d\x37\x75\xd0\x6f\x4f\x4d\x46\x1a\x41\x73\x2f"
         "\xf5\x1b\x4f\x17\x0e\x0d\xfb\xb8\x0b\x32\x77\x10\xbc\x06\x92\x6b\x34"
         "\x4b\x2c\xe7\x6b\x25\x64\x06\x5b\xd9\xbd\xdf\xe5\x66\x66\x70\x45",
         169);
  *(uint64_t*)0x200000000188 = 0x14;
  *(uint64_t*)0x200000000118 = 1;
  *(uint64_t*)0x200000000120 = 0;
  *(uint64_t*)0x200000000128 = 0;
  *(uint32_t*)0x200000000130 = 0x400c801;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000100ul,
          /*f=MSG_ZEROCOPY*/ 0x4000000ul);
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  sendmsg$nl_route arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route]] {
  //      msghdr_netlink[netlink_msg_route] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route]] {
  //          iovec[in, netlink_msg_route] {
  //            addr: ptr[in, netlink_msg_route] {
  //              union netlink_msg_route {
  //                newlink: netlink_msg_t[const[RTM_NEWLINK, int16],
  //                ifinfomsg[AF_UNSPEC], ifla_policy] {
  //                  len: len = 0x30 (4 bytes)
  //                  type: const = 0x10 (2 bytes)
  //                  flags: netlink_msg_flags = 0x801 (2 bytes)
  //                  seq: int32 = 0x0 (4 bytes)
  //                  pid: int32 = 0x0 (4 bytes)
  //                  payload: ifinfomsg[AF_UNSPEC] {
  //                    ifi_family: const = 0x0 (1 bytes)
  //                    __ifi_pad: const = 0x0 (1 bytes)
  //                    ifi_type: const = 0x0 (2 bytes)
  //                    ifi_index: ifindex (resource)
  //                    ifi_flags: net_device_flags = 0x0 (4 bytes)
  //                    ifi_change: net_device_flags = 0x200e3 (4 bytes)
  //                  }
  //                  attrs: array[ifla_policy] {
  //                    union ifla_policy {
  //                      IFLA_MASTER: nlattr_t[const[IFLA_MASTER, int16],
  //                      ifindex] {
  //                        nla_len: offsetof = 0x8 (2 bytes)
  //                        nla_type: const = 0xa (2 bytes)
  //                        payload: ifindex (resource)
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                    union ifla_policy {
  //                      IFLA_GROUP: nlattr_t[const[IFLA_GROUP, int16], int32]
  //                      {
  //                        nla_len: offsetof = 0x8 (2 bytes)
  //                        nla_type: const = 0x1b (2 bytes)
  //                        payload: int32 = 0x0 (4 bytes)
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x30 (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*)0x2000000004c0 = 0;
  *(uint32_t*)0x2000000004c8 = 0;
  *(uint64_t*)0x2000000004d0 = 0x200000000080;
  *(uint64_t*)0x200000000080 = 0x200000000000;
  *(uint32_t*)0x200000000000 = 0x30;
  *(uint16_t*)0x200000000004 = 0x10;
  *(uint16_t*)0x200000000006 = 0x801;
  *(uint32_t*)0x200000000008 = 0;
  *(uint32_t*)0x20000000000c = 0;
  *(uint8_t*)0x200000000010 = 0;
  *(uint8_t*)0x200000000011 = 0;
  *(uint16_t*)0x200000000012 = 0;
  *(uint32_t*)0x200000000014 = 0;
  *(uint32_t*)0x200000000018 = 0;
  *(uint32_t*)0x20000000001c = 0x200e3;
  *(uint16_t*)0x200000000020 = 8;
  *(uint16_t*)0x200000000022 = 0xa;
  *(uint32_t*)0x200000000024 = 0;
  *(uint16_t*)0x200000000028 = 8;
  *(uint16_t*)0x20000000002a = 0x1b;
  *(uint32_t*)0x20000000002c = 0;
  *(uint64_t*)0x200000000088 = 0x30;
  *(uint64_t*)0x2000000004d8 = 1;
  *(uint64_t*)0x2000000004e0 = 0;
  *(uint64_t*)0x2000000004e8 = 0;
  *(uint32_t*)0x2000000004f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x2000000004c0ul, /*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;
}