// https://syzkaller.appspot.com/bug?id=d4463a2d3563cdc5823b22d4e115144d0af7e88c
// 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 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;
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (4 bytes)
  //  ]
  //  returns sock_nl_generic
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
  if (res != -1)
    r[0] = res;
  //  socket arguments: [
  //    domain: socket_domain = 0x2d (8 bytes)
  //    type: socket_type = 0x2 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  syscall(__NR_socket, /*domain=AF_VSOCK|AF_APPLETALK*/ 0x2dul,
          /*type=SOCK_DGRAM*/ 2ul, /*proto=*/0);
  //  sendmsg$nl_generic arguments: [
  //    fd: sock_nl_generic (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[netlink_random_msg_type,
  //    genlmsghdr, nl_generic_attr]]] {
  //      msghdr_netlink[netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //      nl_generic_attr]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_t[netlink_random_msg_type,
  //        genlmsghdr, nl_generic_attr]]] {
  //          iovec[in, netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //          nl_generic_attr]] {
  //            addr: ptr[in, netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //            nl_generic_attr]] {
  //              netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //              nl_generic_attr] {
  //                len: len = 0x14 (4 bytes)
  //                type: int16 = 0x27 (2 bytes)
  //                flags: netlink_msg_flags = 0x1 (2 bytes)
  //                seq: int32 = 0x7fffd (4 bytes)
  //                pid: int32 = 0x1000 (4 bytes)
  //                payload: genlmsghdr {
  //                  cmd: int8 = 0x6 (1 bytes)
  //                  version: const = 0x0 (1 bytes)
  //                  reserved: const = 0x0 (2 bytes)
  //                }
  //                attrs: array[nl_generic_attr] {
  //                }
  //              }
  //            }
  //            len: len = 0x14 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x400c801 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4008090 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000148 = 0;
  *(uint64_t*)0x200000000150 = 0x200000000000;
  *(uint64_t*)0x200000000000 = 0x200000000040;
  *(uint32_t*)0x200000000040 = 0x14;
  *(uint16_t*)0x200000000044 = 0x27;
  *(uint16_t*)0x200000000046 = 1;
  *(uint32_t*)0x200000000048 = 0x7fffd;
  *(uint32_t*)0x20000000004c = 0x1000;
  *(uint8_t*)0x200000000050 = 6;
  *(uint8_t*)0x200000000051 = 0;
  *(uint16_t*)0x200000000052 = 0;
  *(uint64_t*)0x200000000008 = 0x14;
  *(uint64_t*)0x200000000158 = 1;
  *(uint64_t*)0x200000000160 = 0;
  *(uint64_t*)0x200000000168 = 0;
  *(uint32_t*)0x200000000170 = 0x400c801;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000140ul,
          /*f=MSG_ZEROCOPY|MSG_PROBE|MSG_MORE|MSG_EOR*/ 0x4008090ul);
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  bpf$BPF_PROG_WITH_BTFID_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_with_btfid] {
  //      union bpf_prog_with_btfid {
  //        bpf_lsm: bpf_prog_t[const[BPF_PROG_TYPE_LSM, int32],
  //        const[BPF_LSM_MAC, int32], bpf_lsm_btf_id[opt], const[0, int32]] {
  //          type: const = 0x6 (4 bytes)
  //          ninsn: bytesize8 = 0x3 (4 bytes)
  //          insns: ptr[inout, array[ANYUNION]] {
  //            array[ANYUNION] {
  //              union ANYUNION {
  //                ANYBLOB: buffer: {18 00 00 00 00 3f 00 00 00 00 00 00 00 00
  //                00 f1 95} (length 0x11)
  //              }
  //            }
  //          }
  //          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 = 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 = 0x1b (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: bpf_lsm_btf_id (resource)
  //          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_LSM, int32],
  //          const[BPF_LSM_MAC, int32], bpf_lsm_btf_id[opt], const[0,
  //          int32]]_prog_token_fd_wrapper {
  //            void: buffer: {} (length 0x0)
  //          }
  //          pad: union _bpf_prog_t[const[BPF_PROG_TYPE_LSM, int32],
  //          const[BPF_LSM_MAC, int32], bpf_lsm_btf_id[opt], const[0,
  //          int32]]_pad_wrapper {
  //            value: const = 0x0 (4 bytes)
  //          }
  //        }
  //      }
  //    }
  //    size: len = 0x94 (8 bytes)
  //  ]
  //  returns fd_bpf_prog_with_btfid
  *(uint32_t*)0x200000000200 = 6;
  *(uint32_t*)0x200000000204 = 3;
  *(uint64_t*)0x200000000208 = 0x2000000002c0;
  memcpy((void*)0x2000000002c0,
         "\x18\x00\x00\x00\x00\x3f\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf1\x95",
         17);
  *(uint64_t*)0x200000000210 = 0x200000000300;
  memcpy((void*)0x200000000300, "GPL\000", 4);
  *(uint32_t*)0x200000000218 = 0;
  *(uint32_t*)0x20000000021c = 0;
  *(uint64_t*)0x200000000220 = 0;
  *(uint32_t*)0x200000000228 = 0x40f00;
  *(uint32_t*)0x20000000022c = 0;
  memset((void*)0x200000000230, 0, 16);
  *(uint32_t*)0x200000000240 = 0;
  *(uint32_t*)0x200000000244 = 0x1b;
  *(uint32_t*)0x200000000248 = -1;
  *(uint32_t*)0x20000000024c = 8;
  *(uint64_t*)0x200000000250 = 0;
  *(uint32_t*)0x200000000258 = 0;
  *(uint32_t*)0x20000000025c = 0x10;
  *(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 = 0x10;
  *(uint32_t*)0x20000000028c = 0;
  *(uint32_t*)0x200000000290 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000200ul, /*size=*/0x94ul);
  if (res != -1)
    r[2] = res;
  //  sendmsg$nl_route arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route]] {
  //      msghdr_netlink[netlink_msg_route] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route]] {
  //          iovec[in, netlink_msg_route] {
  //            addr: ptr[in, netlink_msg_route] {
  //              union netlink_msg_route {
  //                newlink: netlink_msg_t[const[RTM_NEWLINK, int16],
  //                ifinfomsg[AF_UNSPEC], ifla_policy] {
  //                  len: len = 0x34 (4 bytes)
  //                  type: const = 0x10 (2 bytes)
  //                  flags: netlink_msg_flags = 0x801 (2 bytes)
  //                  seq: int32 = 0x40 (4 bytes)
  //                  pid: int32 = 0x25dfdbfb (4 bytes)
  //                  payload: ifinfomsg[AF_UNSPEC] {
  //                    ifi_family: const = 0x0 (1 bytes)
  //                    __ifi_pad: const = 0x0 (1 bytes)
  //                    ifi_type: const = 0x0 (2 bytes)
  //                    ifi_index: ifindex (resource)
  //                    ifi_flags: net_device_flags = 0x0 (4 bytes)
  //                    ifi_change: net_device_flags = 0x0 (4 bytes)
  //                  }
  //                  attrs: array[ifla_policy] {
  //                    union ifla_policy {
  //                      IFLA_XDP: nlattr_tt[const[IFLA_XDP, int16:14], 0, 1,
  //                      array[ifla_xdp_policy]] {
  //                        nla_len: offsetof = 0xc (2 bytes)
  //                        nla_type: const = 0x2b (1 bytes)
  //                        NLA_F_NET_BYTEORDER: const = 0x0 (0 bytes)
  //                        NLA_F_NESTED: const = 0x1 (1 bytes)
  //                        payload: array[ifla_xdp_policy] {
  //                          union ifla_xdp_policy {
  //                            IFLA_XDP_FD: nlattr_t[const[IFLA_XDP_FD, int16],
  //                            fd_bpf_prog] {
  //                              nla_len: offsetof = 0x8 (2 bytes)
  //                              nla_type: const = 0x1 (2 bytes)
  //                              payload: fd_bpf_prog (resource)
  //                              size: buffer: {} (length 0x0)
  //                            }
  //                          }
  //                        }
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                    union ifla_policy {
  //                      IFLA_GROUP: nlattr_t[const[IFLA_GROUP, int16], int32]
  //                      {
  //                        nla_len: offsetof = 0x8 (2 bytes)
  //                        nla_type: const = 0x1b (2 bytes)
  //                        payload: int32 = 0x0 (4 bytes)
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x34 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x80 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000340 = 0;
  *(uint32_t*)0x200000000348 = 0;
  *(uint64_t*)0x200000000350 = 0x200000000400;
  *(uint64_t*)0x200000000400 = 0x200000000440;
  *(uint32_t*)0x200000000440 = 0x34;
  *(uint16_t*)0x200000000444 = 0x10;
  *(uint16_t*)0x200000000446 = 0x801;
  *(uint32_t*)0x200000000448 = 0x40;
  *(uint32_t*)0x20000000044c = 0x25dfdbfb;
  *(uint8_t*)0x200000000450 = 0;
  *(uint8_t*)0x200000000451 = 0;
  *(uint16_t*)0x200000000452 = 0;
  *(uint32_t*)0x200000000454 = 0;
  *(uint32_t*)0x200000000458 = 0;
  *(uint32_t*)0x20000000045c = 0;
  *(uint16_t*)0x200000000460 = 0xc;
  STORE_BY_BITMASK(uint16_t, , 0x200000000462, 0x2b, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200000000463, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200000000463, 1, 7, 1);
  *(uint16_t*)0x200000000464 = 8;
  *(uint16_t*)0x200000000466 = 1;
  *(uint32_t*)0x200000000468 = r[2];
  *(uint16_t*)0x20000000046c = 8;
  *(uint16_t*)0x20000000046e = 0x1b;
  *(uint32_t*)0x200000000470 = 0;
  *(uint64_t*)0x200000000408 = 0x34;
  *(uint64_t*)0x200000000358 = 1;
  *(uint64_t*)0x200000000360 = 0;
  *(uint64_t*)0x200000000368 = 0;
  *(uint32_t*)0x200000000370 = 0x80;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000340ul, /*f=*/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;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}