// 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[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
  //                  f9 2b d3 06 b1 00 00 00 02 00 00 00 5b 73 6f 03 59 ac 1c
  //                  af c5 5e 51 7c 6b 41 88 89 23 b8 5c 7c 42 55 07 94 b5 98
  //                  c8 13 f6 09 0f e3 78 f4 b5 a0 62 70 5e c9 0f ee 71 5a e9
  //                  3f 17 bb 97 3b ae e1 ad a9 25 2f b3 b8 1f 63 ed ce 57 88
  //                  01 30 c7 2f e7 8d 38 08 f8 01 cb 58 c6 8f 82 9d af 13 55
  //                  1a 1b 6a 2f 68 54 50 2f dc 42 c8 cc 12 0b bc 89 85 20 ae
  //                  9e fd 37 58 9c d8 14 5b df ae 91 45 cd 59 be a2 bf e9 a3
  //                  d8 51 ba b8 ba c8 c7 33 50 af ac 56 5c f2 05 97 99 62 86
  //                  ab f4 77 c1 92 ef 00 6b 96 ff 1e 8a 00 e5 c8 15 2b ab b9
  //                  fb 19 54 5f f9 ae 94 d3 f7 c6 a9 b6 7c c2 35 3a 56 4d f4
  //                  89 0a a4 f0 00 00 00 00 00 00} (length 0xd5)
  //                }
  //              }
  //            }
  //            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 = 0x2000000001c0;
  memcpy(
      (void*)0x2000000001c0,
      "\x14\x00\x00\x00\x26\x00\x09\x00\x01\x00\x08\x00\x80\xf9\x2b\xd3\x06\xb1"
      "\x00\x00\x00\x02\x00\x00\x00\x5b\x73\x6f\x03\x59\xac\x1c\xaf\xc5\x5e\x51"
      "\x7c\x6b\x41\x88\x89\x23\xb8\x5c\x7c\x42\x55\x07\x94\xb5\x98\xc8\x13\xf6"
      "\x09\x0f\xe3\x78\xf4\xb5\xa0\x62\x70\x5e\xc9\x0f\xee\x71\x5a\xe9\x3f\x17"
      "\xbb\x97\x3b\xae\xe1\xad\xa9\x25\x2f\xb3\xb8\x1f\x63\xed\xce\x57\x88\x01"
      "\x30\xc7\x2f\xe7\x8d\x38\x08\xf8\x01\xcb\x58\xc6\x8f\x82\x9d\xaf\x13\x55"
      "\x1a\x1b\x6a\x2f\x68\x54\x50\x2f\xdc\x42\xc8\xcc\x12\x0b\xbc\x89\x85\x20"
      "\xae\x9e\xfd\x37\x58\x9c\xd8\x14\x5b\xdf\xae\x91\x45\xcd\x59\xbe\xa2\xbf"
      "\xe9\xa3\xd8\x51\xba\xb8\xba\xc8\xc7\x33\x50\xaf\xac\x56\x5c\xf2\x05\x97"
      "\x99\x62\x86\xab\xf4\x77\xc1\x92\xef\x00\x6b\x96\xff\x1e\x8a\x00\xe5\xc8"
      "\x15\x2b\xab\xb9\xfb\x19\x54\x5f\xf9\xae\x94\xd3\xf7\xc6\xa9\xb6\x7c\xc2"
      "\x35\x3a\x56\x4d\xf4\x89\x0a\xa4\xf0\x00\x00\x00\x00\x00\x00",
      213);
  *(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[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {28 00 00 00 10 00 01 08 00 00 00 00 00
  //                  00 00 00 02 00 00 00} (length 0x14)
  //                }
  //                union ANYUNION {
  //                  ANYRES32: ANYRES32 (resource)
  //                }
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {b4 02 00 00 00 00 00 00 08 00 1b}
  //                  (length 0xb)
  //                }
  //              }
  //            }
  //            len: len = 0x28 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x24040000 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000148 = 0;
  *(uint64_t*)0x200000000150 = 0x200000000080;
  *(uint64_t*)0x200000000080 = 0x200000000280;
  memcpy((void*)0x200000000280,
         "\x28\x00\x00\x00\x10\x00\x01\x08\x00\x00\x00\x00\x00\x00\x00\x00\x02"
         "\x00\x00\x00",
         20);
  *(uint32_t*)0x200000000294 = 0;
  memcpy((void*)0x200000000298, "\xb4\x02\x00\x00\x00\x00\x00\x00\x08\x00\x1b",
         11);
  *(uint64_t*)0x200000000088 = 0x28;
  *(uint64_t*)0x200000000158 = 1;
  *(uint64_t*)0x200000000160 = 0;
  *(uint64_t*)0x200000000168 = 0;
  *(uint32_t*)0x200000000170 = 0x24040000;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000140ul, /*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;
}