// https://syzkaller.appspot.com/bug?id=dbcb39beb96c35c5b1f579ec77a4c121d60d21a0
// 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 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$alg arguments: [
  //    domain: const = 0x26 (8 bytes)
  //    type: const = 0x5 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_alg
  res = syscall(__NR_socket, /*domain=*/0x26ul, /*type=*/5ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  bind$alg arguments: [
  //    fd: sock_alg (resource)
  //    addr: ptr[in, sockaddr_alg] {
  //      sockaddr_alg {
  //        family: const = 0x26 (2 bytes)
  //        type: buffer: {73 6b 63 69 70 68 65 72 00 00 00 00 00 00} (length
  //        0xe) feat: af_alg_type = 0x0 (4 bytes) mask: af_alg_type = 0x0 (4
  //        bytes) name: buffer: {65 63 62 2d 73 65 72 70 65 6e 74 2d 73 73 65
  //        32 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00} (length 0x40)
  //      }
  //    }
  //    addrlen: len = 0x58 (8 bytes)
  //  ]
  *(uint16_t*)0x200000000940 = 0x26;
  memcpy((void*)0x200000000942, "skcipher\000\000\000\000\000\000", 14);
  *(uint32_t*)0x200000000950 = 0;
  *(uint32_t*)0x200000000954 = 0;
  memcpy((void*)0x200000000958,
         "ecb-serpent-"
         "sse2\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000",
         64);
  syscall(__NR_bind, /*fd=*/r[0], /*addr=*/0x200000000940ul,
          /*addrlen=*/0x58ul);
  //  setsockopt$ALG_SET_KEY arguments: [
  //    fd: sock_alg (resource)
  //    level: const = 0x117 (4 bytes)
  //    opt: const = 0x1 (4 bytes)
  //    key: nil
  //    keylen: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0x117, /*opt=*/1, /*key=*/0ul,
          /*keylen=*/0ul);
  //  accept$alg arguments: [
  //    fd: sock_alg (resource)
  //    peer: const = 0x0 (8 bytes)
  //    peerlen: const = 0x0 (8 bytes)
  //  ]
  //  returns sock_algconn
  res = syscall(__NR_accept, /*fd=*/r[0], /*peer=*/0ul, /*peerlen=*/0ul);
  if (res != -1)
    r[1] = res;
  //  write$binfmt_script arguments: [
  //    fd: fd_binfmt (resource)
  //    data: ptr[in, binfmt_script] {
  //      binfmt_script {
  //        hdr: buffer: {23 21 20} (length 0x3)
  //        bin: buffer: {} (length 0x0)
  //        args: array[binfmt_script_arg] {
  //        }
  //        nl: const = 0xa (1 bytes)
  //        data: buffer: {} (length 0x0)
  //      }
  //    }
  //    len: bytesize = 0xfec8 (8 bytes)
  //  ]
  memcpy((void*)0x200000000600, "#! ", 3);
  *(uint8_t*)0x200000000603 = 0xa;
  syscall(__NR_write, /*fd=*/r[1], /*data=*/0x200000000600ul, /*len=*/0xfec8ul);
  //  recvmmsg arguments: [
  //    fd: sock (resource)
  //    mmsg: ptr[in, array[recv_mmsghdr]] {
  //      array[recv_mmsghdr] {
  //        recv_mmsghdr {
  //          msg_hdr: recv_msghdr {
  //            msg_name: nil
  //            msg_namelen: len = 0x0 (4 bytes)
  //            pad = 0x0 (4 bytes)
  //            msg_iov: ptr[in, array[iovec[out, array[int8]]]] {
  //              array[iovec[out, array[int8]]] {
  //                iovec[out, array[int8]] {
  //                  addr: ptr[out, buffer] {
  //                    buffer: (DirOut)
  //                  }
  //                  len: len = 0x1000 (8 bytes)
  //                }
  //              }
  //            }
  //            msg_iovlen: len = 0x1 (8 bytes)
  //            msg_control: nil
  //            msg_controllen: bytesize = 0x0 (8 bytes)
  //            msg_flags: const = 0x0 (4 bytes)
  //            pad = 0x0 (4 bytes)
  //          }
  //          msg_len: int32 = 0x80000000 (4 bytes)
  //          pad = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    vlen: len = 0x1 (8 bytes)
  //    f: recv_flags = 0x100 (8 bytes)
  //    timeout: nil
  //  ]
  *(uint64_t*)0x200000001d40 = 0;
  *(uint32_t*)0x200000001d48 = 0;
  *(uint64_t*)0x200000001d50 = 0x200000001a00;
  *(uint64_t*)0x200000001a00 = 0x200000002140;
  *(uint64_t*)0x200000001a08 = 0x1000;
  *(uint64_t*)0x200000001d58 = 1;
  *(uint64_t*)0x200000001d60 = 0;
  *(uint64_t*)0x200000001d68 = 0;
  *(uint32_t*)0x200000001d70 = 0;
  *(uint32_t*)0x200000001d78 = 0x80000000;
  syscall(__NR_recvmmsg, /*fd=*/r[1], /*mmsg=*/0x200000001d40ul, /*vlen=*/1ul,
          /*f=MSG_WAITALL*/ 0x100ul, /*timeout=*/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;
  loop();
  return 0;
}