// 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[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 = 0x27 (2 bytes)
  //                flags: netlink_msg_flags = 0x9 (2 bytes)
  //                seq: int32 = 0x70bd25 (4 bytes)
  //                pid: int32 = 0x25dfdbfd (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 = 0x4000002 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4000080 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000100 = 0;
  *(uint32_t*)0x200000000108 = 0;
  *(uint64_t*)0x200000000110 = 0x200000000180;
  *(uint64_t*)0x200000000180 = 0x200000000300;
  *(uint32_t*)0x200000000300 = 0x14;
  *(uint16_t*)0x200000000304 = 0x27;
  *(uint16_t*)0x200000000306 = 9;
  *(uint32_t*)0x200000000308 = 0x70bd25;
  *(uint32_t*)0x20000000030c = 0x25dfdbfd;
  *(uint8_t*)0x200000000310 = 6;
  *(uint8_t*)0x200000000311 = 0;
  *(uint16_t*)0x200000000312 = 0;
  *(uint64_t*)0x200000000188 = 0x14;
  *(uint64_t*)0x200000000118 = 1;
  *(uint64_t*)0x200000000120 = 0;
  *(uint64_t*)0x200000000128 = 0;
  *(uint32_t*)0x200000000130 = 0x4000002;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000100ul,
          /*f=MSG_ZEROCOPY|MSG_EOR*/ 0x4000080ul);
  //  socket$kcm arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: kcm_socket_type = 0x2 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_kcm
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=SOCK_DGRAM*/ 2ul,
                /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  sendmsg$kcm arguments: [
  //    fd: sock_kcm (resource)
  //    msg: ptr[in, send_msghdr] {
  //      send_msghdr {
  //        msg_name: nil
  //        msg_namelen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        msg_iov: ptr[in, array[iovec[in, array[int8]]]] {
  //          array[iovec[in, array[int8]]] {
  //            iovec[in, array[int8]] {
  //              addr: ptr[in, buffer] {
  //                buffer: {d8 00 00 00 1c 00 81 04 4e 81 f7 82 db 44 b9 04 02
  //                1d 08 02 01 00 00 00 05 00 f0 a1 18 00 02 00 00 00 00 00 00
  //                00 0e 12 08 00 0f 01 00 81 04 01 a8 00 16 00 20 00 01 40 03
  //                00 00 08 03 60 fa b9 39 cf 5c 04 61 c1 d6 7f 6f 94 00 71 34
  //                cf 6e e0 80 00 a0 e4 08 e8 d8 ef 07 5c 11 50 3c 6b ba ce 80
  //                17 cb 09 00 00 00 1f b7 91 64 3a 5e e4 00 1b 14 62 18 a0 74
  //                45 d6 d9 30 df e1 d9 d3 22 fe 7c 9f d6 87 75 73 0d 16 a4 68
  //                3f 5a eb 4e db b5 7a 50 25 cc ca 9e 00 36 0d b7 01 00 00 00
  //                40 fa d9 56 67 e0 06 00 00 00 00 00 00 00 80 bb 9a d8 09 d5
  //                e1 ca ce 81 ed 0b ff ec e0 b4 2a 9e cb ee 5d e6 cc d4 0d d6
  //                8a db ef 3d 93 45 2a 00 00 00 00 00 00 00 00 00 00 00 00}
  //                (length 0xd8)
  //              }
  //              len: len = 0xd8 (8 bytes)
  //            }
  //          }
  //        }
  //        msg_iovlen: len = 0x1 (8 bytes)
  //        msg_control: nil
  //        msg_controllen: bytesize = 0x0 (8 bytes)
  //        msg_flags: const = 0x7400 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x20004800 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000080 = 0;
  *(uint32_t*)0x200000000088 = 0;
  *(uint64_t*)0x200000000090 = 0x200000000200;
  *(uint64_t*)0x200000000200 = 0x200000000340;
  memcpy((void*)0x200000000340,
         "\xd8\x00\x00\x00\x1c\x00\x81\x04\x4e\x81\xf7\x82\xdb\x44\xb9\x04\x02"
         "\x1d\x08\x02\x01\x00\x00\x00\x05\x00\xf0\xa1\x18\x00\x02\x00\x00\x00"
         "\x00\x00\x00\x00\x0e\x12\x08\x00\x0f\x01\x00\x81\x04\x01\xa8\x00\x16"
         "\x00\x20\x00\x01\x40\x03\x00\x00\x08\x03\x60\xfa\xb9\x39\xcf\x5c\x04"
         "\x61\xc1\xd6\x7f\x6f\x94\x00\x71\x34\xcf\x6e\xe0\x80\x00\xa0\xe4\x08"
         "\xe8\xd8\xef\x07\x5c\x11\x50\x3c\x6b\xba\xce\x80\x17\xcb\x09\x00\x00"
         "\x00\x1f\xb7\x91\x64\x3a\x5e\xe4\x00\x1b\x14\x62\x18\xa0\x74\x45\xd6"
         "\xd9\x30\xdf\xe1\xd9\xd3\x22\xfe\x7c\x9f\xd6\x87\x75\x73\x0d\x16\xa4"
         "\x68\x3f\x5a\xeb\x4e\xdb\xb5\x7a\x50\x25\xcc\xca\x9e\x00\x36\x0d\xb7"
         "\x01\x00\x00\x00\x40\xfa\xd9\x56\x67\xe0\x06\x00\x00\x00\x00\x00\x00"
         "\x00\x80\xbb\x9a\xd8\x09\xd5\xe1\xca\xce\x81\xed\x0b\xff\xec\xe0\xb4"
         "\x2a\x9e\xcb\xee\x5d\xe6\xcc\xd4\x0d\xd6\x8a\xdb\xef\x3d\x93\x45\x2a"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         216);
  *(uint64_t*)0x200000000208 = 0xd8;
  *(uint64_t*)0x200000000098 = 1;
  *(uint64_t*)0x2000000000a0 = 0;
  *(uint64_t*)0x2000000000a8 = 0;
  *(uint32_t*)0x2000000000b0 = 0x7400;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000080ul,
          /*f=MSG_FASTOPEN|MSG_NOSIGNAL|MSG_CONFIRM*/ 0x20004800ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*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=*/0x200001000000ul, /*len=*/0x1000, /*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;
}