// 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$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (4 bytes)
  //  ]
  //  returns sock_nl_generic
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
  if (res != -1)
    r[0] = res;
  //  sendmsg$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 = 0x29 (2 bytes)
  //                flags: netlink_msg_flags = 0x1 (2 bytes)
  //                seq: int32 = 0x70bd27 (4 bytes)
  //                pid: int32 = 0x25dfdbfd (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 = 0x2204c85c (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x20040000 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000900 = 0;
  *(uint32_t*)0x200000000908 = 0;
  *(uint64_t*)0x200000000910 = 0x200000000940;
  *(uint64_t*)0x200000000940 = 0x200000000980;
  *(uint32_t*)0x200000000980 = 0x14;
  *(uint16_t*)0x200000000984 = 0x29;
  *(uint16_t*)0x200000000986 = 1;
  *(uint32_t*)0x200000000988 = 0x70bd27;
  *(uint32_t*)0x20000000098c = 0x25dfdbfd;
  *(uint8_t*)0x200000000990 = 6;
  *(uint8_t*)0x200000000991 = 0;
  *(uint16_t*)0x200000000992 = 0;
  *(uint64_t*)0x200000000948 = 0x14;
  *(uint64_t*)0x200000000918 = 1;
  *(uint64_t*)0x200000000920 = 0;
  *(uint64_t*)0x200000000928 = 0;
  *(uint32_t*)0x200000000930 = 0x2204c85c;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000900ul,
          /*f=MSG_FASTOPEN|MSG_BATCH*/ 0x20040000ul);
  //  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 = 0x6 (4 bytes)
  //        ninsn: bytesize8 = 0x4 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 02 00 00 00 00 00 00 00 00 00 00 00 00 00
  //              30 85 00 00 00 2c 00 00 00 95 00 00 00 00 00 00 00 2b 40 03 fe
  //              37 a0 77 ae 55 f5 2c 0d 80 a2 64 9b ac a8 53 09 be 96 d5 a4 5b
  //              bb db 5f f7 ff ff ff d0 75 b3 ee e1 44 73 f5 1b e9 8d b7 ef bb
  //              05 98 42 ba dc fc 81 36 44 70 e8 e0 4a cb 80 7f bb ab c6 8a bd
  //              cc e9 f6 72 b6 bb 61 c3 02 df d5 c1 10 71 ad ac 29 fd 64 d3 3a
  //              35 02 fb eb 1e d9 9d d0 e7 92 f2 4c 42 0b fc c2 63 54 21 d3 39
  //              ad 52 1d 69 53 b1 13 78 50 d9 e9 eb f6 5e e9 88 ea 2d be e5 28
  //              67 8e b4 7e fb 7b 3f 19 04 6c 6f 1b d1 bf 56 e5 85 3e d9 61 37
  //              f9 5b 3a 11 95 4e d1 c8 a8 67 64 68 cf 24 05 e4 87 23 d4 b1
  //              ff} (length 0xcc)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {47 50 4c 00} (length 0x4)
  //        }
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x1000 (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:
  //        union bpf_prog_attach_types {
  //          xdp: xdp_attach_types = 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: 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 = 0x10 (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 = 0x18 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x200000000100 = 6;
  *(uint32_t*)0x200000000104 = 4;
  *(uint64_t*)0x200000000108 = 0x2000000001c0;
  memcpy((void*)0x2000000001c0,
         "\x18\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x30\x85"
         "\x00\x00\x00\x2c\x00\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\x2b\x40"
         "\x03\xfe\x37\xa0\x77\xae\x55\xf5\x2c\x0d\x80\xa2\x64\x9b\xac\xa8\x53"
         "\x09\xbe\x96\xd5\xa4\x5b\xbb\xdb\x5f\xf7\xff\xff\xff\xd0\x75\xb3\xee"
         "\xe1\x44\x73\xf5\x1b\xe9\x8d\xb7\xef\xbb\x05\x98\x42\xba\xdc\xfc\x81"
         "\x36\x44\x70\xe8\xe0\x4a\xcb\x80\x7f\xbb\xab\xc6\x8a\xbd\xcc\xe9\xf6"
         "\x72\xb6\xbb\x61\xc3\x02\xdf\xd5\xc1\x10\x71\xad\xac\x29\xfd\x64\xd3"
         "\x3a\x35\x02\xfb\xeb\x1e\xd9\x9d\xd0\xe7\x92\xf2\x4c\x42\x0b\xfc\xc2"
         "\x63\x54\x21\xd3\x39\xad\x52\x1d\x69\x53\xb1\x13\x78\x50\xd9\xe9\xeb"
         "\xf6\x5e\xe9\x88\xea\x2d\xbe\xe5\x28\x67\x8e\xb4\x7e\xfb\x7b\x3f\x19"
         "\x04\x6c\x6f\x1b\xd1\xbf\x56\xe5\x85\x3e\xd9\x61\x37\xf9\x5b\x3a\x11"
         "\x95\x4e\xd1\xc8\xa8\x67\x64\x68\xcf\x24\x05\xe4\x87\x23\xd4\xb1\xff",
         204);
  *(uint64_t*)0x200000000110 = 0x2000000002c0;
  memcpy((void*)0x2000000002c0, "GPL\000", 4);
  *(uint32_t*)0x200000000118 = 0;
  *(uint32_t*)0x20000000011c = 0x1000;
  *(uint64_t*)0x200000000120 = 0x200000000300;
  *(uint32_t*)0x200000000128 = 0;
  *(uint32_t*)0x20000000012c = 0;
  memset((void*)0x200000000130, 0, 16);
  *(uint32_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000144 = 0;
  *(uint32_t*)0x200000000148 = -1;
  *(uint32_t*)0x20000000014c = 8;
  *(uint64_t*)0x200000000150 = 0;
  *(uint32_t*)0x200000000158 = 0;
  *(uint32_t*)0x20000000015c = 0x10;
  *(uint64_t*)0x200000000160 = 0;
  *(uint32_t*)0x200000000168 = 0;
  *(uint32_t*)0x20000000016c = 0;
  *(uint32_t*)0x200000000170 = -1;
  *(uint32_t*)0x200000000174 = 0;
  *(uint64_t*)0x200000000178 = 0;
  *(uint64_t*)0x200000000180 = 0;
  *(uint32_t*)0x200000000188 = 0x10;
  *(uint32_t*)0x20000000018c = 0;
  *(uint32_t*)0x200000000190 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000100ul, /*size=*/0x18ul);
  if (res != -1)
    r[1] = res;
  //  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[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 = 0x100000 (4 bytes)
  //                  pid: int32 = 0x0 (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 = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000001340 = 0;
  *(uint32_t*)0x200000001348 = 0;
  *(uint64_t*)0x200000001350 = 0x200000001380;
  *(uint64_t*)0x200000001380 = 0x2000000013c0;
  *(uint32_t*)0x2000000013c0 = 0x34;
  *(uint16_t*)0x2000000013c4 = 0x10;
  *(uint16_t*)0x2000000013c6 = 0x801;
  *(uint32_t*)0x2000000013c8 = 0x100000;
  *(uint32_t*)0x2000000013cc = 0;
  *(uint8_t*)0x2000000013d0 = 0;
  *(uint8_t*)0x2000000013d1 = 0;
  *(uint16_t*)0x2000000013d2 = 0;
  *(uint32_t*)0x2000000013d4 = 0;
  *(uint32_t*)0x2000000013d8 = 0;
  *(uint32_t*)0x2000000013dc = 0;
  *(uint16_t*)0x2000000013e0 = 0xc;
  STORE_BY_BITMASK(uint16_t, , 0x2000000013e2, 0x2b, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000000013e3, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000000013e3, 1, 7, 1);
  *(uint16_t*)0x2000000013e4 = 8;
  *(uint16_t*)0x2000000013e6 = 1;
  *(uint32_t*)0x2000000013e8 = r[1];
  *(uint16_t*)0x2000000013ec = 8;
  *(uint16_t*)0x2000000013ee = 0x1b;
  *(uint32_t*)0x2000000013f0 = 0;
  *(uint64_t*)0x200000001388 = 0x34;
  *(uint64_t*)0x200000001358 = 1;
  *(uint64_t*)0x200000001360 = 0;
  *(uint64_t*)0x200000001368 = 0;
  *(uint32_t*)0x200000001370 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x200000001340ul, /*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;
}