// https://syzkaller.appspot.com/bug?id=77bcabec7ab3b41ff2ffe499079e96ceb6dd4aab
// 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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socketpair$unix arguments: [
  //    domain: const = 0x1 (8 bytes)
  //    type: unix_socket_type = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //    fds: ptr[out, unix_pair] {
  //      unix_pair {
  //        fd0: sock_unix (resource)
  //        fd1: sock_unix (resource)
  //      }
  //    }
  //  ]
  res = syscall(__NR_socketpair, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul,
                /*proto=*/0, /*fds=*/0x200000000040ul);
  if (res != -1) {
    r[0] = *(uint32_t*)0x200000000040;
    r[1] = *(uint32_t*)0x200000000044;
  }
  //  bpf$MAP_CREATE arguments: [
  //    cmd: const = 0x0 (8 bytes)
  //    arg: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {0f 00 00 00 04 00 00 00 04 00 00 00 12} (length
  //          0xd)
  //        }
  //      }
  //    }
  //    size: len = 0x50 (8 bytes)
  //  ]
  //  returns fd_bpf_map
  memcpy((void*)0x200000000200,
         "\x0f\x00\x00\x00\x04\x00\x00\x00\x04\x00\x00\x00\x12", 13);
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200000000200ul, /*size=*/0x50ul);
  if (res != -1)
    r[2] = res;
  //  bpf$PROG_LOAD_XDP arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32], const[BPF_XDP,
  //    int32], const[0, int32], const[0, int32]]] {
  //      bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32], const[BPF_XDP, int32],
  //      const[0, int32], const[0, int32]] {
  //        type: const = 0xe (4 bytes)
  //        ninsn: bytesize8 = 0x4 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 02 00 00 80 10 00 00 00 00 00 00 04 00 00
  //              00 85 00 00 00 2e 00 00 00 95} (length 0x19)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {73 79 7a 6b 61 6c 6c 65 72 00} (length 0xa)
  //        }
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x40f00 (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:
  //        const = 0x25 (4 bytes) btf_fd: fd_btf (resource) func_info_rec_size:
  //        const = 0x8 (4 bytes) func_info: nil func_info_cnt: len = 0x0 (4
  //        bytes) line_info_rec_size: const = 0x10 (4 bytes) line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: const = 0x0 (4 bytes)
  //        attach_prog_fd: const = 0x0 (4 bytes)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x10 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
  //        const[BPF_XDP, int32], const[0, int32], const[0,
  //        int32]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
  //        const[BPF_XDP, int32], const[0, int32], const[0, int32]]_pad_wrapper
  //        {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x80 (8 bytes)
  //  ]
  //  returns fd_bpf_prog_xdp
  *(uint32_t*)0x200000000340 = 0xe;
  *(uint32_t*)0x200000000344 = 4;
  *(uint64_t*)0x200000000348 = 0x200000000400;
  memcpy((void*)0x200000000400,
         "\x18\x02\x00\x00\x80\x10\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x85"
         "\x00\x00\x00\x2e\x00\x00\x00\x95",
         25);
  *(uint64_t*)0x200000000350 = 0x200000000000;
  memcpy((void*)0x200000000000, "syzkaller\000", 10);
  *(uint32_t*)0x200000000358 = 0;
  *(uint32_t*)0x20000000035c = 0;
  *(uint64_t*)0x200000000360 = 0;
  *(uint32_t*)0x200000000368 = 0x40f00;
  *(uint32_t*)0x20000000036c = 0;
  memset((void*)0x200000000370, 0, 16);
  *(uint32_t*)0x200000000380 = 0;
  *(uint32_t*)0x200000000384 = 0x25;
  *(uint32_t*)0x200000000388 = -1;
  *(uint32_t*)0x20000000038c = 8;
  *(uint64_t*)0x200000000390 = 0;
  *(uint32_t*)0x200000000398 = 0;
  *(uint32_t*)0x20000000039c = 0x10;
  *(uint64_t*)0x2000000003a0 = 0;
  *(uint32_t*)0x2000000003a8 = 0;
  *(uint32_t*)0x2000000003ac = 0;
  *(uint32_t*)0x2000000003b0 = 0;
  *(uint32_t*)0x2000000003b4 = 0;
  *(uint64_t*)0x2000000003b8 = 0;
  *(uint64_t*)0x2000000003c0 = 0;
  *(uint32_t*)0x2000000003c8 = 0x10;
  *(uint32_t*)0x2000000003cc = 0;
  *(uint32_t*)0x2000000003d0 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000340ul, /*size=*/0x80ul);
  if (res != -1)
    r[3] = res;
  //  bpf$BPF_PROG_DETACH arguments: [
  //    cmd: const = 0x8 (8 bytes)
  //    arg: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYRES32: ANYRES32 (resource)
  //        }
  //        union ANYUNION {
  //          ANYRES32: ANYRES32 (resource)
  //        }
  //        union ANYUNION {
  //          ANYBLOB: buffer: {05} (length 0x1)
  //        }
  //      }
  //    }
  //    size: len = 0x10 (8 bytes)
  //  ]
  *(uint32_t*)0x200000000180 = r[2];
  *(uint32_t*)0x200000000184 = r[3];
  memset((void*)0x200000000188, 5, 1);
  syscall(__NR_bpf, /*cmd=*/8ul, /*arg=*/0x200000000180ul, /*size=*/0x10ul);
  //  bpf$MAP_UPDATE_ELEM_TAIL_CALL arguments: [
  //    cmd: const = 0x2 (8 bytes)
  //    arg: ptr[inout, bpf_map_update_tail_call_arg] {
  //      bpf_map_update_tail_call_arg {
  //        map: tail_call_map_update {
  //          in: tail_call_map_fd (resource)
  //          out: tail_call_map (resource)
  //        }
  //        pad = 0x0 (4 bytes)
  //        key: ptr[in, const[0, const]] {
  //          const = 0x0 (4 bytes)
  //        }
  //        val: ptr[in, fd_bpf_prog] {
  //          fd_bpf_prog (resource)
  //        }
  //        flags: const = 0x0 (8 bytes)
  //      }
  //    }
  //    size: len = 0x20 (8 bytes)
  //  ]
  *(uint32_t*)0x200000000740 = r[2];
  *(uint64_t*)0x200000000748 = 0x2000000006c0;
  *(uint32_t*)0x2000000006c0 = 0;
  *(uint64_t*)0x200000000750 = 0x200000000700;
  *(uint32_t*)0x200000000700 = r[1];
  *(uint64_t*)0x200000000758 = 0;
  syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x200000000740ul, /*size=*/0x20ul);
  //  sendmsg$inet arguments: [
  //    fd: sock (resource)
  //    msg: ptr[in, msghdr_inet] {
  //      msghdr_inet {
  //        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: {55} (length 0x1)
  //              }
  //              len: len = 0x1 (8 bytes)
  //            }
  //            iovec[in, array[int8]] {
  //              addr: nil
  //              len: len = 0x0 (8 bytes)
  //            }
  //            iovec[in, array[int8]] {
  //              addr: nil
  //              len: len = 0x0 (8 bytes)
  //            }
  //          }
  //        }
  //        msg_iovlen: len = 0x3 (8 bytes)
  //        msg_control: nil
  //        msg_controllen: bytesize = 0x0 (8 bytes)
  //        msg_flags: const = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x3 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000980 = 0;
  *(uint32_t*)0x200000000988 = 0;
  *(uint64_t*)0x200000000990 = 0x200000000140;
  *(uint64_t*)0x200000000140 = 0x200000000640;
  memset((void*)0x200000000640, 85, 1);
  *(uint64_t*)0x200000000148 = 1;
  *(uint64_t*)0x200000000150 = 0;
  *(uint64_t*)0x200000000158 = 0;
  *(uint64_t*)0x200000000160 = 0;
  *(uint64_t*)0x200000000168 = 0;
  *(uint64_t*)0x200000000998 = 3;
  *(uint64_t*)0x2000000009a0 = 0;
  *(uint64_t*)0x2000000009a8 = 0;
  *(uint32_t*)0x2000000009b0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000980ul,
          /*f=MSG_OOB|0x2*/ 3ul);
  //  close arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_close, /*fd=*/3);
  //  recvmsg$unix arguments: [
  //    fd: sock_unix (resource)
  //    msg: ptr[inout, recv_msghdr_un] {
  //      recv_msghdr_un {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, array[iovec[out, array[int8]]]] {
  //          array[iovec[out, array[int8]]] {
  //            iovec[out, array[int8]] {
  //              addr: ptr[out, buffer] {
  //                buffer: (DirOut)
  //              }
  //              len: len = 0x76 (8 bytes)
  //            }
  //            iovec[out, array[int8]] {
  //              addr: nil
  //              len: len = 0x0 (8 bytes)
  //            }
  //            iovec[out, array[int8]] {
  //              addr: nil
  //              len: len = 0x0 (8 bytes)
  //            }
  //            iovec[out, array[int8]] {
  //              addr: nil
  //              len: len = 0x0 (8 bytes)
  //            }
  //            iovec[out, array[int8]] {
  //              addr: nil
  //              len: len = 0x0 (8 bytes)
  //            }
  //          }
  //        }
  //        vlen: len = 0x5 (8 bytes)
  //        ctrl: nil
  //        ctrllen: bytesize = 0x0 (8 bytes)
  //        f: const = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: recv_flags = 0x2001 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000a80 = 0;
  *(uint32_t*)0x200000000a88 = 0;
  *(uint64_t*)0x200000000a90 = 0x2000000009c0;
  *(uint64_t*)0x2000000009c0 = 0x2000000002c0;
  *(uint64_t*)0x2000000009c8 = 0x76;
  *(uint64_t*)0x2000000009d0 = 0;
  *(uint64_t*)0x2000000009d8 = 0;
  *(uint64_t*)0x2000000009e0 = 0;
  *(uint64_t*)0x2000000009e8 = 0;
  *(uint64_t*)0x2000000009f0 = 0;
  *(uint64_t*)0x2000000009f8 = 0;
  *(uint64_t*)0x200000000a00 = 0;
  *(uint64_t*)0x200000000a08 = 0;
  *(uint64_t*)0x200000000a98 = 5;
  *(uint64_t*)0x200000000aa0 = 0;
  *(uint64_t*)0x200000000aa8 = 0;
  *(uint32_t*)0x200000000ab0 = 0;
  syscall(__NR_recvmsg, /*fd=*/r[1], /*msg=*/0x200000000a80ul,
          /*f=MSG_OOB|MSG_ERRQUEUE*/ 0x2001ul, 0);
}
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;
}