// 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;
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  sendmsg$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 = 0xe0 (4 bytes)
  //                  type: const = 0x10 (2 bytes)
  //                  flags: netlink_msg_flags = 0x1 (2 bytes)
  //                  seq: int32 = 0x20002 (4 bytes)
  //                  pid: int32 = 0x60000 (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 = 0x40021 (4 bytes)
  //                  }
  //                  attrs: array[ifla_policy] {
  //                    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)
  //                      }
  //                    }
  //                    union ifla_policy {
  //                      IFLA_PORT_SELF: nlattr_tt[const[IFLA_PORT_SELF,
  //                      int16:14], 0, 1, array[ifla_port_policy]] {
  //                        nla_len: offsetof = 0xb8 (2 bytes)
  //                        nla_type: const = 0x19 (1 bytes)
  //                        NLA_F_NET_BYTEORDER: const = 0x0 (0 bytes)
  //                        NLA_F_NESTED: const = 0x1 (1 bytes)
  //                        payload: array[ifla_port_policy] {
  //                          union ifla_port_policy {
  //                            IFLA_PORT_PROFILE:
  //                            nlattr_t[const[IFLA_PORT_PROFILE, int16],
  //                            string] {
  //                              nla_len: offsetof = 0xb2 (2 bytes)
  //                              nla_type: const = 0x2 (2 bytes)
  //                              payload: buffer: {2d 6a 2d 00 67 35 b4 b3 a4
  //                              a6 a0 ee 3f 57 ca 22 10 9e 55 81 af 10 98 e4
  //                              2c 3a 21 54 87 a4 09 83 8a 5a 37 fa 10 5e 4e
  //                              16 5f ae 80 e7 12 d4 9f 4f ca dc 17 6e cc 3a
  //                              e7 6a 1f 45 eb 69 86 aa 81 b0 ed e6 70 d1 0c
  //                              47 bf 64 e7 f8 9b 10 db 66 8f c9 d0 c8 a8 8a
  //                              a3 75 4e 31 04 a8 45 77 e0 59 68 8f 01 ef 37
  //                              e7 95 1c c4 a9 ff 92 7c 1f 26 44 55 90 db cb
  //                              34 5e e0 24 5a 89 b0 c7 3c 4d e7 dd 58 93 21
  //                              b8 85 8c 92 8c da dc ac 6b c8 84 3e ca 3b 8c
  //                              92 b5 2f da 7f 56 15 ea 3c c4 cb 6e 5a a2 c0
  //                              16 93 c6 73 6e 8b 37 d3 7a 8c 27 f1 68 5c dc}
  //                              (length 0xae) size: buffer: {} (length 0x0)
  //                            }
  //                          }
  //                        }
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0xe0 (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 = 0x4080 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000180 = 0;
  *(uint32_t*)0x200000000188 = 0;
  *(uint64_t*)0x200000000190 = 0x2000000005c0;
  *(uint64_t*)0x2000000005c0 = 0x200000000600;
  *(uint32_t*)0x200000000600 = 0xe0;
  *(uint16_t*)0x200000000604 = 0x10;
  *(uint16_t*)0x200000000606 = 1;
  *(uint32_t*)0x200000000608 = 0x20002;
  *(uint32_t*)0x20000000060c = 0x60000;
  *(uint8_t*)0x200000000610 = 0;
  *(uint8_t*)0x200000000611 = 0;
  *(uint16_t*)0x200000000612 = 0;
  *(uint32_t*)0x200000000614 = 0;
  *(uint32_t*)0x200000000618 = 0;
  *(uint32_t*)0x20000000061c = 0x40021;
  *(uint16_t*)0x200000000620 = 8;
  *(uint16_t*)0x200000000622 = 0x1b;
  *(uint32_t*)0x200000000624 = 0;
  *(uint16_t*)0x200000000628 = 0xb8;
  STORE_BY_BITMASK(uint16_t, , 0x20000000062a, 0x19, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000000062b, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000000062b, 1, 7, 1);
  *(uint16_t*)0x20000000062c = 0xb2;
  *(uint16_t*)0x20000000062e = 2;
  memcpy((void*)0x200000000630,
         "-j-\000g5\264\263\244\246\240\356?"
         "W\312\"\020\236U\201\257\020\230\344,:!T\207\244\t\203\212Z7\372\020^"
         "N\026_\256\200\347\022\324\237O\312\334\027n\314:"
         "\347j\037E\353i\206\252\201\260\355\346p\321\fG\277d\347\370\233\020"
         "\333f\217\311\320\310\250\212\243uN1\004\250Ew\340Yh\217\001\3577\347"
         "\225\034\304\251\377\222|\037&DU\220\333\3134^\340$Z\211\260\307<"
         "M\347\335X\223!\270\205\214\222\214\332\334\254k\310\204>\312;"
         "\214\222\265/"
         "\332\177V\025\352<"
         "\304\313nZ\242\300\026\223\306sn\2137\323z\214\'\361h\\\334",
         174);
  *(uint64_t*)0x2000000005c8 = 0xe0;
  *(uint64_t*)0x200000000198 = 1;
  *(uint64_t*)0x2000000001a0 = 0;
  *(uint64_t*)0x2000000001a8 = 0;
  *(uint32_t*)0x2000000001b0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000180ul,
          /*f=MSG_NOSIGNAL|MSG_EOR*/ 0x4080ul);
  //  socket$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[1] = res;
  //  socket$inet6 arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: socket_type = 0x3 (8 bytes)
  //    proto: int32 = 0xff (4 bytes)
  //  ]
  //  returns sock_in6
  syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_RAW*/ 3ul, /*proto=*/0xff);
  //  sendmsg$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 = 0x1 (2 bytes)
  //                seq: int32 = 0x7fffd (4 bytes)
  //                pid: int32 = 0x1000 (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 = 0x400c801 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4008090 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000240 = 0;
  *(uint32_t*)0x200000000248 = 0;
  *(uint64_t*)0x200000000250 = 0x200000000280;
  *(uint64_t*)0x200000000280 = 0x2000000002c0;
  *(uint32_t*)0x2000000002c0 = 0x14;
  *(uint16_t*)0x2000000002c4 = 0x27;
  *(uint16_t*)0x2000000002c6 = 1;
  *(uint32_t*)0x2000000002c8 = 0x7fffd;
  *(uint32_t*)0x2000000002cc = 0x1000;
  *(uint8_t*)0x2000000002d0 = 6;
  *(uint8_t*)0x2000000002d1 = 0;
  *(uint16_t*)0x2000000002d2 = 0;
  *(uint64_t*)0x200000000288 = 0x14;
  *(uint64_t*)0x200000000258 = 1;
  *(uint64_t*)0x200000000260 = 0;
  *(uint64_t*)0x200000000268 = 0;
  *(uint32_t*)0x200000000270 = 0x400c801;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000240ul,
          /*f=MSG_ZEROCOPY|MSG_PROBE|MSG_MORE|MSG_EOR*/ 0x4008090ul);
}
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;
}