// https://syzkaller.appspot.com/bug?id=c22ee94b80912108c555d645aa3a6a43ed92d84f
// 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
#ifndef __NR_close_range
#define __NR_close_range 436
#endif
#ifndef __NR_seccomp
#define __NR_seccomp 317
#endif

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;
}

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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  seccomp$SECCOMP_SET_MODE_FILTER_LISTENER arguments: [
  //    op: const = 0x1 (8 bytes)
  //    flags: seccomp_flags_listener = 0x0 (8 bytes)
  //    arg: ptr[in, sock_fprog] {
  //      sock_fprog {
  //        len: len = 0x1 (2 bytes)
  //        pad = 0x0 (6 bytes)
  //        filter: ptr[in, array[sock_filter]] {
  //          array[sock_filter] {
  //            sock_filter {
  //              code: int16 = 0x6 (2 bytes)
  //              jt: int8 = 0x2 (1 bytes)
  //              jf: int8 = 0x0 (1 bytes)
  //              k: int32 = 0x7fff0000 (4 bytes)
  //            }
  //          }
  //        }
  //      }
  //    }
  //  ]
  //  returns fd_seccomp
  *(uint16_t*)0x200000000000 = 1;
  *(uint64_t*)0x200000000008 = 0x200000000100;
  *(uint16_t*)0x200000000100 = 6;
  *(uint8_t*)0x200000000102 = 2;
  *(uint8_t*)0x200000000103 = 0;
  *(uint32_t*)0x200000000104 = 0x7fff0000;
  res = syscall(__NR_seccomp, /*op=*/1ul, /*flags=*/0ul,
                /*arg=*/0x200000000000ul);
  if (res != -1)
    r[0] = res;
  //  socket$vsock_stream arguments: [
  //    domain: const = 0x28 (8 bytes)
  //    type: const = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_vsock_stream
  res = syscall(__NR_socket, /*domain=*/0x28ul, /*type=*/1ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  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 = 0x11 (4 bytes)
  //        ninsn: bytesize8 = 0xc (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //              00 18 01 00 00 75 6c 6c 25 00 00 00 00 00 20 20 20 7b 1a f8 ff
  //              00 00 00 00 bf a1 00 00 00 00 00 00 07 01 00 00 f8 ff ff ff b7
  //              02 00 00 08 00 00 00 b7 03 00 00 ff ff 00 20 85 00 00 00 70 00
  //              00 00 85 00 00 00 2a 00 00 00 95} (length 0x59)
  //            }
  //          }
  //        }
  //        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 = 0x90 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x200000000200 = 0x11;
  *(uint32_t*)0x200000000204 = 0xc;
  *(uint64_t*)0x200000000208 = 0x200000000140;
  memcpy(
      (void*)0x200000000140,
      "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x01"
      "\x00\x00\x75\x6c\x6c\x25\x00\x00\x00\x00\x00\x20\x20\x20\x7b\x1a\xf8\xff"
      "\x00\x00\x00\x00\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01\x00\x00\xf8\xff"
      "\xff\xff\xb7\x02\x00\x00\x08\x00\x00\x00\xb7\x03\x00\x00\xff\xff\x00\x20"
      "\x85\x00\x00\x00\x70\x00\x00\x00\x85\x00\x00\x00\x2a\x00\x00\x00\x95",
      89);
  *(uint64_t*)0x200000000210 = 0x200000000040;
  memcpy((void*)0x200000000040, "GPL\000", 4);
  *(uint32_t*)0x200000000218 = 0;
  *(uint32_t*)0x20000000021c = 0;
  *(uint64_t*)0x200000000220 = 0;
  *(uint32_t*)0x200000000228 = 0;
  *(uint32_t*)0x20000000022c = 0;
  memset((void*)0x200000000230, 0, 16);
  *(uint32_t*)0x200000000240 = 0;
  *(uint32_t*)0x200000000244 = 0;
  *(uint32_t*)0x200000000248 = -1;
  *(uint32_t*)0x20000000024c = 0;
  *(uint64_t*)0x200000000250 = 0;
  *(uint32_t*)0x200000000258 = 0;
  *(uint32_t*)0x20000000025c = 0;
  *(uint64_t*)0x200000000260 = 0;
  *(uint32_t*)0x200000000268 = 0;
  *(uint32_t*)0x20000000026c = 0;
  *(uint32_t*)0x200000000270 = 0;
  *(uint32_t*)0x200000000274 = 0;
  *(uint64_t*)0x200000000278 = 0;
  *(uint64_t*)0x200000000280 = 0;
  *(uint32_t*)0x200000000288 = 0;
  *(uint32_t*)0x20000000028c = 0;
  *(uint32_t*)0x200000000290 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000200ul, /*size=*/0x90ul);
  if (res != -1)
    r[2] = res;
  //  bpf$BPF_RAW_TRACEPOINT_OPEN arguments: [
  //    cmd: const = 0x11 (8 bytes)
  //    arg: ptr[in, bpf_raw_tracepoint] {
  //      bpf_raw_tracepoint {
  //        name: ptr[in, buffer] {
  //          buffer: {76 69 72 74 69 6f 5f 74 72 61 6e 73 70 6f 72 74 5f 61 6c
  //          6c 6f 63 5f 70 6b 74 00} (length 0x1b)
  //        }
  //        prog_fd: fd_bpf_prog_raw_tracepoint (resource)
  //        pad: const = 0x0 (4 bytes)
  //        cookie: int64 = 0x0 (8 bytes)
  //      }
  //    }
  //    size: len = 0x10 (8 bytes)
  //  ]
  //  returns fd_perf_base
  *(uint64_t*)0x2000000008c0 = 0x200000000040;
  memcpy((void*)0x200000000040, "virtio_transport_alloc_pkt\000", 27);
  *(uint32_t*)0x2000000008c8 = r[2];
  *(uint32_t*)0x2000000008cc = 0;
  *(uint64_t*)0x2000000008d0 = 0;
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x2000000008c0ul, /*size=*/0x10ul);
  //  bind$vsock_stream arguments: [
  //    fd: sock_vsock_stream (resource)
  //    addr: ptr[in, sockaddr_vm] {
  //      sockaddr_vm {
  //        svm_family: const = 0x28 (2 bytes)
  //        svm_reserved1: const = 0x0 (2 bytes)
  //        svm_port: vmaddr_port = 0x0 (4 bytes)
  //        svm_cid: union vmaddr_cid {
  //          local: const = 0x1 (4 bytes)
  //        }
  //        svm_zero: const = 0x0 (4 bytes)
  //      }
  //    }
  //    addrlen: len = 0x10 (8 bytes)
  //  ]
  *(uint16_t*)0x200000000440 = 0x28;
  *(uint16_t*)0x200000000442 = 0;
  *(uint32_t*)0x200000000444 = 0;
  *(uint32_t*)0x200000000448 = 1;
  *(uint32_t*)0x20000000044c = 0;
  syscall(__NR_bind, /*fd=*/r[1], /*addr=*/0x200000000440ul,
          /*addrlen=*/0x10ul);
  //  listen arguments: [
  //    fd: sock (resource)
  //    backlog: int32 = 0xa (4 bytes)
  //  ]
  syscall(__NR_listen, /*fd=*/r[1], /*backlog=*/0xa);
  //  socket$vsock_stream arguments: [
  //    domain: const = 0x28 (8 bytes)
  //    type: const = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_vsock_stream
  res = syscall(__NR_socket, /*domain=*/0x28ul, /*type=*/1ul, /*proto=*/0);
  if (res != -1)
    r[3] = res;
  //  connect$vsock_stream arguments: [
  //    fd: sock_vsock_stream (resource)
  //    addr: ptr[in, sockaddr_vm] {
  //      sockaddr_vm {
  //        svm_family: const = 0x28 (2 bytes)
  //        svm_reserved1: const = 0x0 (2 bytes)
  //        svm_port: vmaddr_port = 0x0 (4 bytes)
  //        svm_cid: union vmaddr_cid {
  //          local: const = 0x1 (4 bytes)
  //        }
  //        svm_zero: const = 0x0 (4 bytes)
  //      }
  //    }
  //    addrlen: len = 0x10 (8 bytes)
  //  ]
  *(uint16_t*)0x200000000000 = 0x28;
  *(uint16_t*)0x200000000002 = 0;
  *(uint32_t*)0x200000000004 = 0;
  *(uint32_t*)0x200000000008 = 1;
  *(uint32_t*)0x20000000000c = 0;
  syscall(__NR_connect, /*fd=*/r[3], /*addr=*/0x200000000000ul,
          /*addrlen=*/0x10ul);
  //  close_range arguments: [
  //    fd: fd (resource)
  //    max_fd: fd (resource)
  //    flags: close_range_flags = 0x0 (8 bytes)
  //  ]
  inject_fault(2);
  syscall(__NR_close_range, /*fd=*/r[0], /*max_fd=*/r[3], /*flags=*/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);
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}