// https://syzkaller.appspot.com/bug?id=772e7943c6b9c558280573887e1e3a751b36cdea
// 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>

#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 int inject_fault(int nth)
{
  int fd;
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  char buf[16];
  sprintf(buf, "%d", nth);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

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 const char* setup_fault()
{
  int fd = open("/proc/self/make-it-fail", O_WRONLY);
  if (fd == -1)
    return "CONFIG_FAULT_INJECTION is not enabled";
  close(fd);
  fd = open("/proc/thread-self/fail-nth", O_WRONLY);
  if (fd == -1)
    return "kernel does not have systematic fault injection support";
  close(fd);
  static struct {
    const char* file;
    const char* val;
    bool fatal;
  } files[] = {
      {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
      {"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
  };
  unsigned i;
  for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].file, files[i].val)) {
      if (files[i].fatal)
        return "failed to write fault injection file";
    }
  }
  return NULL;
}

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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$inet6_tcp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: const = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_tcp6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=*/1ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  listen arguments: [
  //    fd: sock (resource)
  //    backlog: int32 = 0x0 (4 bytes)
  //  ]
  syscall(__NR_listen, /*fd=*/r[0], /*backlog=*/0);
  //  bpf$BPF_PROG_RAW_TRACEPOINT_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_raw_tracepoint_prog_types, int32],
  //    const[0, int32], const[0, int32], const[0, int32]]] {
  //      bpf_prog_t[flags[bpf_raw_tracepoint_prog_types, int32], const[0,
  //      int32], const[0, int32], const[0, int32]] {
  //        type: bpf_raw_tracepoint_prog_types = 0x10 (4 bytes)
  //        ninsn: bytesize8 = 0x4 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 02 00 00 00 c4 00 00 00 00 00 00 00 00 00
  //              00 85 00 00 00 3e 00 00 00 95} (length 0x19)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {47 50 4c 00} (length 0x4)
  //        }
  //        loglev: int32 = 0x1 (4 bytes)
  //        logsize: len = 0xa6 (4 bytes)
  //        log: ptr[out, buffer] {
  //          buffer: (DirOut)
  //        }
  //        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:
  //        const = 0x0 (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[flags[bpf_raw_tracepoint_prog_types, int32], const[0,
  //        int32], const[0, int32], const[0, int32]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_raw_tracepoint_prog_types, int32],
  //        const[0, int32], const[0, int32], const[0, int32]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x80 (8 bytes)
  //  ]
  //  returns fd_bpf_prog_raw_tracepoint
  *(uint32_t*)0x200000000680 = 0x10;
  *(uint32_t*)0x200000000684 = 4;
  *(uint64_t*)0x200000000688 = 0x200000000380;
  memcpy((void*)0x200000000380,
         "\x18\x02\x00\x00\x00\xc4\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x85"
         "\x00\x00\x00\x3e\x00\x00\x00\x95",
         25);
  *(uint64_t*)0x200000000690 = 0x2000000000c0;
  memcpy((void*)0x2000000000c0, "GPL\000", 4);
  *(uint32_t*)0x200000000698 = 1;
  *(uint32_t*)0x20000000069c = 0xa6;
  *(uint64_t*)0x2000000006a0 = 0x2000000003c0;
  *(uint32_t*)0x2000000006a8 = 0;
  *(uint32_t*)0x2000000006ac = 0;
  memset((void*)0x2000000006b0, 0, 16);
  *(uint32_t*)0x2000000006c0 = 0;
  *(uint32_t*)0x2000000006c4 = 0;
  *(uint32_t*)0x2000000006c8 = -1;
  *(uint32_t*)0x2000000006cc = 8;
  *(uint64_t*)0x2000000006d0 = 0;
  *(uint32_t*)0x2000000006d8 = 0;
  *(uint32_t*)0x2000000006dc = 0x10;
  *(uint64_t*)0x2000000006e0 = 0;
  *(uint32_t*)0x2000000006e8 = 0;
  *(uint32_t*)0x2000000006ec = 0;
  *(uint32_t*)0x2000000006f0 = 0;
  *(uint32_t*)0x2000000006f4 = 0;
  *(uint64_t*)0x2000000006f8 = 0;
  *(uint64_t*)0x200000000700 = 0;
  *(uint32_t*)0x200000000708 = 0x10;
  *(uint32_t*)0x20000000070c = 0;
  *(uint32_t*)0x200000000710 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000680ul, /*size=*/0x80ul);
  if (res != -1)
    r[1] = res;
  //  bpf$MAP_CREATE arguments: [
  //    cmd: const = 0x0 (8 bytes)
  //    arg: ptr[in, bpf_map_create_arg] {
  //      union bpf_map_create_arg {
  //        base: bpf_map_create_arg_t[flags[bpf_map_type, int32], int32, int32,
  //        int32, flags[map_flags, int32], const[0, int64]] {
  //          type: bpf_map_type = 0x12 (4 bytes)
  //          ksize: int32 = 0x1 (4 bytes)
  //          vsize: int32 = 0x8 (4 bytes)
  //          max: int32 = 0xb (4 bytes)
  //          flags: map_flags = 0x0 (4 bytes)
  //          inner: fd_bpf_map (resource)
  //          node: int32 = 0x0 (4 bytes)
  //          map_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //          00} (length 0x10) map_ifindex: ifindex (resource) btf_fd: fd_btf
  //          (resource) btf_key_type_id: int32 = 0x0 (4 bytes)
  //          btf_value_type_id: int32 = 0x0 (4 bytes)
  //          btf_vmlinux_type_id: int32 = 0x0 (4 bytes)
  //          map_extra: const = 0x0 (8 bytes)
  //          value_type_btf_obj_fd: union
  //          _bpf_map_create_arg_t[flags[bpf_map_type, int32], int32, int32,
  //          int32, flags[map_flags, int32], const[0,
  //          int64]]_value_type_btf_obj_fd_wrapper {
  //            void: buffer: {} (length 0x0)
  //          }
  //          pad1: union _bpf_map_create_arg_t[flags[bpf_map_type, int32],
  //          int32, int32, int32, flags[map_flags, int32], const[0,
  //          int64]]_pad1_wrapper {
  //            value: const = 0x0 (4 bytes)
  //          }
  //          map_token_fd: union _bpf_map_create_arg_t[flags[bpf_map_type,
  //          int32], int32, int32, int32, flags[map_flags, int32], const[0,
  //          int64]]_map_token_fd_wrapper {
  //            void: buffer: {} (length 0x0)
  //          }
  //          pad2: union _bpf_map_create_arg_t[flags[bpf_map_type, int32],
  //          int32, int32, int32, flags[map_flags, int32], const[0,
  //          int64]]_pad2_wrapper {
  //            value: const = 0x0 (4 bytes)
  //          }
  //        }
  //      }
  //    }
  //    size: len = 0x50 (8 bytes)
  //  ]
  //  returns fd_bpf_map
  *(uint32_t*)0x2000000023c0 = 0x12;
  *(uint32_t*)0x2000000023c4 = 1;
  *(uint32_t*)0x2000000023c8 = 8;
  *(uint32_t*)0x2000000023cc = 0xb;
  *(uint32_t*)0x2000000023d0 = 0;
  *(uint32_t*)0x2000000023d4 = -1;
  *(uint32_t*)0x2000000023d8 = 0;
  memset((void*)0x2000000023dc, 0, 16);
  *(uint32_t*)0x2000000023ec = 0;
  *(uint32_t*)0x2000000023f0 = -1;
  *(uint32_t*)0x2000000023f4 = 0;
  *(uint32_t*)0x2000000023f8 = 0;
  *(uint32_t*)0x2000000023fc = 0;
  *(uint64_t*)0x200000002400 = 0;
  *(uint32_t*)0x200000002408 = 0;
  *(uint32_t*)0x20000000240c = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x2000000023c0ul, /*size=*/0x50ul);
  if (res != -1)
    r[2] = res;
  //  bpf$BPF_PROG_DETACH arguments: [
  //    cmd: const = 0x8 (8 bytes)
  //    arg: ptr[in, bpf_detach_arg] {
  //      bpf_detach_arg {
  //        target: union bpf_attach_targets {
  //          map: fd_bpf_map (resource)
  //        }
  //        prog: fd_bpf_prog (resource)
  //        type: bpf_attach_types = 0x7 (4 bytes)
  //        flags: bpf_mprog_attach_flags = 0x0 (4 bytes)
  //        replace_bpf_fd: const = 0x0 (4 bytes)
  //        relative_link_fd: union _bpf_detach_arg_relative_link_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        relative_prog_fd: union _bpf_detach_arg_relative_prog_fd_wrapper {
  //          value: fd_bpf_prog (resource)
  //        }
  //        relative_link_id: union _bpf_detach_arg_relative_link_id_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        relative_prog_id: union _bpf_detach_arg_relative_prog_id_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        exp_revision: bpf_revision (resource)
  //      }
  //    }
  //    size: len = 0x10 (8 bytes)
  //  ]
  *(uint32_t*)0x2000000001c0 = r[2];
  *(uint32_t*)0x2000000001c4 = r[1];
  *(uint32_t*)0x2000000001c8 = 7;
  *(uint32_t*)0x2000000001cc = 0;
  *(uint32_t*)0x2000000001d0 = 0;
  *(uint32_t*)0x2000000001d4 = -1;
  *(uint64_t*)0x2000000001d8 = 0;
  syscall(__NR_bpf, /*cmd=*/8ul, /*arg=*/0x2000000001c0ul, /*size=*/0x10ul);
  //  bpf$MAP_UPDATE_ELEM arguments: [
  //    cmd: const = 0x2 (8 bytes)
  //    arg: ptr[in, bpf_map_update_arg] {
  //      bpf_map_update_arg {
  //        map: fd_bpf_map (resource)
  //        pad = 0x0 (4 bytes)
  //        key: ptr[in, buffer] {
  //          buffer: {} (length 0x0)
  //        }
  //        val: ptr[in, bpf_map_update_val] {
  //          union bpf_map_update_val {
  //            tcp6: sock_tcp6 (resource)
  //          }
  //        }
  //        flags: bpf_map_flags = 0x0 (8 bytes)
  //      }
  //    }
  //    size: len = 0x20 (8 bytes)
  //  ]
  *(uint32_t*)0x200000000500 = r[2];
  *(uint64_t*)0x200000000508 = 0x200000000240;
  *(uint64_t*)0x200000000510 = 0x2000000004c0;
  *(uint32_t*)0x2000000004c0 = r[0];
  *(uint64_t*)0x200000000518 = 0;
  syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x200000000500ul, /*size=*/0x20ul);
  //  sendto$inet6 arguments: [
  //    fd: sock_in6 (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {cb} (length 0x1)
  //    }
  //    len: len = 0x1 (8 bytes)
  //    f: send_flags = 0x24004090 (8 bytes)
  //    addr: nil
  //    addrlen: len = 0x0 (8 bytes)
  //  ]
  memset((void*)0x200000000040, 203, 1);
  inject_fault(3);
  syscall(__NR_sendto, /*fd=*/r[0], /*buf=*/0x200000000040ul, /*len=*/1ul,
          /*f=MSG_ZEROCOPY|MSG_FASTOPEN|MSG_PROBE|MSG_NOSIGNAL|MSG_EOR*/
          0x24004090ul, /*addr=*/0ul, /*addrlen=*/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;
  if ((reason = setup_fault()))
    printf("the reproducer may not work as expected: fault injection setup "
           "failed: %s\n",
           reason);
  loop();
  return 0;
}