// https://syzkaller.appspot.com/bug?id=4b23d66c05cf4503157023fffd5f0219aad91fc5
// 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>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

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[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$inet_tcp arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: const = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_tcp
  res = syscall(__NR_socket, /*domain=*/2ul, /*type=*/1ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  bind$inet arguments: [
  //    fd: sock_in (resource)
  //    addr: ptr[in, sockaddr_in] {
  //      sockaddr_in {
  //        family: const = 0x2 (2 bytes)
  //        port: int16be = 0x4e20 (2 bytes)
  //        addr: union ipv4_addr {
  //          loopback: const = 0x7f000001 (4 bytes)
  //        }
  //        pad = 0x0 (8 bytes)
  //      }
  //    }
  //    addrlen: len = 0x10 (8 bytes)
  //  ]
  *(uint16_t*)0x200000000000 = 2;
  *(uint16_t*)0x200000000002 = htobe16(0x4e20);
  *(uint32_t*)0x200000000004 = htobe32(0x7f000001);
  syscall(__NR_bind, /*fd=*/r[0], /*addr=*/0x200000000000ul,
          /*addrlen=*/0x10ul);
  //  listen arguments: [
  //    fd: sock (resource)
  //    backlog: int32 = 0x5 (4 bytes)
  //  ]
  syscall(__NR_listen, /*fd=*/r[0], /*backlog=*/5);
  //  socket$inet_tcp arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: const = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_tcp
  res = syscall(__NR_socket, /*domain=*/2ul, /*type=*/1ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  connect$inet arguments: [
  //    fd: sock_in (resource)
  //    addr: ptr[in, sockaddr_in] {
  //      sockaddr_in {
  //        family: const = 0x2 (2 bytes)
  //        port: int16be = 0x4e20 (2 bytes)
  //        addr: union ipv4_addr {
  //          loopback: const = 0x7f000001 (4 bytes)
  //        }
  //        pad = 0x0 (8 bytes)
  //      }
  //    }
  //    addrlen: len = 0x10 (8 bytes)
  //  ]
  *(uint16_t*)0x200000000010 = 2;
  *(uint16_t*)0x200000000012 = htobe16(0x4e20);
  *(uint32_t*)0x200000000014 = htobe32(0x7f000001);
  syscall(__NR_connect, /*fd=*/r[1], /*addr=*/0x200000000010ul,
          /*addrlen=*/0x10ul);
  //  accept arguments: [
  //    fd: sock (resource)
  //    peer: nil
  //    peerlen: nil
  //  ]
  //  returns sock
  res = syscall(__NR_accept, /*fd=*/r[0], /*peer=*/0ul, /*peerlen=*/0ul);
  if (res != -1)
    r[2] = res;
  //  setsockopt$inet_tcp_TCP_ULP arguments: [
  //    fd: sock_tcp (resource)
  //    level: const = 0x6 (4 bytes)
  //    optname: const = 0x1f (4 bytes)
  //    optval: ptr[in, buffer] {
  //      buffer: {74 6c 73} (length 0x3)
  //    }
  //    optlen: len = 0x4 (8 bytes)
  //  ]
  memcpy((void*)0x2000000000c0, "tls", 3);
  syscall(__NR_setsockopt, /*fd=*/r[2], /*level=*/6, /*optname=*/0x1f,
          /*optval=*/0x2000000000c0ul, /*optlen=*/4ul);
  //  setsockopt$inet_tcp_TLS_RX arguments: [
  //    fd: sock_tcp (resource)
  //    level: const = 0x11a (4 bytes)
  //    optname: const = 0x2 (4 bytes)
  //    optval: ptr[in, tls_crypto_info_u] {
  //      union tls_crypto_info_u {
  //        gcm_128: tls12_crypto_info_aes_gcm_128 {
  //          info: tls_crypto_info[TLS_CIPHER_AES_GCM_128] {
  //            version: tls_crypto_version = 0x303 (2 bytes)
  //            cipher_type: const = 0x33 (2 bytes)
  //          }
  //          iv: buffer: {00 00 00 00 00 00 00 00} (length 0x8)
  //          key: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //          (length 0x10) salt: buffer: {00 00 00 00} (length 0x4) rec_seq:
  //          buffer: {00 00 00 00 00 00 00 00} (length 0x8)
  //        }
  //      }
  //    }
  //    optlen: len = 0x28 (8 bytes)
  //  ]
  *(uint16_t*)0x200000000200 = 0x303;
  *(uint16_t*)0x200000000202 = 0x33;
  memset((void*)0x200000000204, 0, 8);
  memset((void*)0x20000000020c, 0, 16);
  memset((void*)0x20000000021c, 0, 4);
  memset((void*)0x200000000220, 0, 8);
  syscall(__NR_setsockopt, /*fd=*/r[2], /*level=*/0x11a, /*optname=*/2,
          /*optval=*/0x200000000200ul, /*optlen=*/0x28ul);
  //  bpf$PROG_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
  //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
  //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
  //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
  //        type: bpf_prog_type = 0x1 (4 bytes)
  //        ninsn: bytesize8 = 0x2 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {b7 00 00 00 25 00 00 00 95 00 00 00 00 00 00
  //              00} (length 0x10)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {47 50 4c 00} (length 0x4)
  //        }
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x0 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        union bpf_prog_attach_types {
  //          fallback: bpf_attach_types = 0x0 (4 bytes)
  //        }
  //        btf_fd: fd_btf (resource)
  //        func_info_rec_size: const = 0x0 (4 bytes)
  //        func_info: nil
  //        func_info_cnt: len = 0x0 (4 bytes)
  //        line_info_rec_size: const = 0x0 (4 bytes)
  //        line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: bpf_btf_id (resource)
  //        attach_prog_fd: fd_bpf_prog (resource)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x0 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0xa0 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x200000000100 = 1;
  *(uint32_t*)0x200000000104 = 2;
  *(uint64_t*)0x200000000108 = 0x200000000040;
  memcpy((void*)0x200000000040,
         "\xb7\x00\x00\x00\x25\x00\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00",
         16);
  *(uint64_t*)0x200000000110 = 0x2000000001c0;
  memcpy((void*)0x2000000001c0, "GPL\000", 4);
  *(uint32_t*)0x200000000118 = 0;
  *(uint32_t*)0x20000000011c = 0;
  *(uint64_t*)0x200000000120 = 0;
  *(uint32_t*)0x200000000128 = 0;
  *(uint32_t*)0x20000000012c = 0;
  memset((void*)0x200000000130, 0, 16);
  *(uint32_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000144 = 0;
  *(uint32_t*)0x200000000148 = 0;
  *(uint32_t*)0x20000000014c = 0;
  *(uint64_t*)0x200000000150 = 0;
  *(uint32_t*)0x200000000158 = 0;
  *(uint32_t*)0x20000000015c = 0;
  *(uint64_t*)0x200000000160 = 0;
  *(uint32_t*)0x200000000168 = 0;
  *(uint32_t*)0x20000000016c = 0;
  *(uint32_t*)0x200000000170 = 0;
  *(uint32_t*)0x200000000174 = 0;
  *(uint64_t*)0x200000000178 = 0;
  *(uint64_t*)0x200000000180 = 0;
  *(uint32_t*)0x200000000188 = 0;
  *(uint32_t*)0x20000000018c = 0;
  *(uint32_t*)0x200000000190 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000100ul, /*size=*/0xa0ul);
  if (res != -1)
    r[3] = res;
  //  socket$kcm arguments: [
  //    domain: const = 0x29 (8 bytes)
  //    type: kcm_socket_type = 0x2 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_kcm
  res = syscall(__NR_socket, /*domain=*/0x29ul, /*type=SOCK_DGRAM*/ 2ul,
                /*proto=*/0);
  if (res != -1)
    r[4] = res;
  //  ioctl$sock_kcm_SIOCKCMATTACH arguments: [
  //    fd: sock_kcm (resource)
  //    cmd: const = 0x89e0 (4 bytes)
  //    arg: ptr[in, kcm_attach] {
  //      kcm_attach {
  //        fd: sock (resource)
  //        bpf_fd: fd_bpf_prog (resource)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000300 = r[2];
  *(uint32_t*)0x200000000304 = r[3];
  syscall(__NR_ioctl, /*fd=*/r[4], /*cmd=*/0x89e0, /*arg=*/0x200000000300ul);
  //  sendto$inet arguments: [
  //    fd: sock_in (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {17 03 03 00 20 30 31 32 33 34 35 36 37 38 39 30 31 32 33 34
  //      35 36 37 38 39 30 31 32 33 34 35 36 37 38 39 30 31} (length 0x25)
  //    }
  //    len: len = 0x25 (8 bytes)
  //    f: send_flags = 0x0 (8 bytes)
  //    addr: nil
  //    addrlen: len = 0x0 (8 bytes)
  //  ]
  memcpy((void*)0x200000000400,
         "\x17\x03\x03\x00\x20\x30\x31\x32\x33\x34\x35\x36\x37\x38\x39\x30\x31"
         "\x32\x33\x34\x35\x36\x37\x38\x39\x30\x31\x32\x33\x34\x35\x36\x37\x38"
         "\x39\x30\x31",
         37);
  syscall(__NR_sendto, /*fd=*/r[1], /*buf=*/0x200000000400ul, /*len=*/0x25ul,
          /*f=*/0ul, /*addr=*/0ul, /*addrlen=*/0ul);
}
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;
  loop();
  return 0;
}