// 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/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[2] = {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 = 0x18 (4 bytes)
  //                type: int16 = 0x26 (2 bytes)
  //                flags: netlink_msg_flags = 0x1 (2 bytes)
  //                seq: int32 = 0x80005 (4 bytes)
  //                pid: int32 = 0x1104 (4 bytes)
  //                payload: genlmsghdr {
  //                  cmd: int8 = 0x6 (1 bytes)
  //                  version: const = 0x0 (1 bytes)
  //                  reserved: const = 0x0 (2 bytes)
  //                }
  //                attrs: array[nl_generic_attr] {
  //                  union nl_generic_attr {
  //                    nested: nlattr_tt[int16:14[0:NETLINK_MAX_ATTRIBUTES], 0,
  //                    1, array[nl_generic_attr]] {
  //                      nla_len: offsetof = 0x4 (2 bytes)
  //                      nla_type: int16 = 0x1 (1 bytes)
  //                      NLA_F_NET_BYTEORDER: const = 0x0 (0 bytes)
  //                      NLA_F_NESTED: const = 0x1 (1 bytes)
  //                      payload: array[nl_generic_attr] {
  //                      }
  //                      size: buffer: {} (length 0x0)
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x18 (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 = 0x400c890 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000148 = 0;
  *(uint64_t*)0x200000000150 = 0x200000000000;
  *(uint64_t*)0x200000000000 = 0x200000000080;
  *(uint32_t*)0x200000000080 = 0x18;
  *(uint16_t*)0x200000000084 = 0x26;
  *(uint16_t*)0x200000000086 = 1;
  *(uint32_t*)0x200000000088 = 0x80005;
  *(uint32_t*)0x20000000008c = 0x1104;
  *(uint8_t*)0x200000000090 = 6;
  *(uint8_t*)0x200000000091 = 0;
  *(uint16_t*)0x200000000092 = 0;
  *(uint16_t*)0x200000000094 = 4;
  STORE_BY_BITMASK(uint16_t, , 0x200000000096, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200000000097, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200000000097, 1, 7, 1);
  *(uint64_t*)0x200000000008 = 0x18;
  *(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_NOSIGNAL|MSG_MORE|MSG_EOR|MSG_CONFIRM*/
          0x400c890ul);
  //  bpf$ITER_CREATE arguments: [
  //    cmd: const = 0xb (8 bytes)
  //    arg: nil
  //    size: len = 0x0 (8 bytes)
  //  ]
  //  returns fd
  syscall(__NR_bpf, /*cmd=*/0xbul, /*arg=*/0ul, /*size=*/0ul);
  //  socket$netlink arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: netlink_proto = 0x0 (4 bytes)
  //  ]
  //  returns sock_netlink
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  sendmsg$nl_route_sched arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] {
  //      msghdr_netlink[netlink_msg_route_sched] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route_sched]] {
  //          iovec[in, netlink_msg_route_sched] {
  //            addr: ptr[in, netlink_msg_route_sched] {
  //              union netlink_msg_route_sched {
  //                newqdisc: netlink_msg_t[const[RTM_NEWQDISC, int16],
  //                tcmsg[AF_UNSPEC], rtm_tca_policy] {
  //                  len: len = 0x54 (4 bytes)
  //                  type: const = 0x10 (2 bytes)
  //                  flags: netlink_msg_flags = 0x1 (2 bytes)
  //                  seq: int32 = 0x0 (4 bytes)
  //                  pid: int32 = 0x0 (4 bytes)
  //                  payload: tcmsg[AF_UNSPEC] {
  //                    family: const = 0x0 (1 bytes)
  //                    tcm__pad1: const = 0x0 (1 bytes)
  //                    tcm__pad2: const = 0x0 (2 bytes)
  //                    ifindex: ifindex (resource)
  //                    tcm_handle: tcm_handle {
  //                      minor: tcm_handle_offsets = 0xffe0 (2 bytes)
  //                      major: tcm_handle_offsets = 0x0 (2 bytes)
  //                    }
  //                    tcm_parent: tcm_handle {
  //                      minor: tcm_handle_offsets = 0xf (2 bytes)
  //                      major: tcm_handle_offsets = 0x6 (2 bytes)
  //                    }
  //                    tcm_info: tcm_handle {
  //                      minor: tcm_handle_offsets = 0xe (2 bytes)
  //                      major: tcm_handle_offsets = 0xd (2 bytes)
  //                    }
  //                  }
  //                  attrs: array[rtm_tca_policy] {
  //                    union rtm_tca_policy {
  //                      TCA_RATE: nlattr_t[const[TCA_RATE, int16],
  //                      tc_estimator] {
  //                        nla_len: offsetof = 0x6 (2 bytes)
  //                        nla_type: const = 0x5 (2 bytes)
  //                        payload: tc_estimator {
  //                          interval: int8 = 0x9 (1 bytes)
  //                          ewma_log: int8 = 0x1 (1 bytes)
  //                        }
  //                        size: buffer: {} (length 0x0)
  //                        pad = 0x0 (2 bytes)
  //                      }
  //                    }
  //                    union rtm_tca_policy {
  //                      TCA_STAB: nlattr_tt[const[TCA_STAB, int16:14], 0, 1,
  //                      array[stab_policy]] {
  //                        nla_len: offsetof = 0x28 (2 bytes)
  //                        nla_type: const = 0x8 (1 bytes)
  //                        NLA_F_NET_BYTEORDER: const = 0x0 (0 bytes)
  //                        NLA_F_NESTED: const = 0x1 (1 bytes)
  //                        payload: array[stab_policy] {
  //                          stab_policy {
  //                            TCA_STAB_BASE: nlattr_t[const[TCA_STAB_BASE,
  //                            int16], tc_sizespec] {
  //                              nla_len: offsetof = 0x1c (2 bytes)
  //                              nla_type: const = 0x1a (2 bytes)
  //                              payload: tc_sizespec {
  //                                cell_log: int8 = 0x0 (1 bytes)
  //                                size_log: int8 = 0x0 (1 bytes)
  //                                cell_align: int16 = 0x491 (2 bytes)
  //                                overhead: int32 = 0x0 (4 bytes)
  //                                linklayer: linklayer = 0x0 (4 bytes)
  //                                mpu: int32 = 0x0 (4 bytes)
  //                                mtu: int32 = 0x8 (4 bytes)
  //                                tsize: len = 0x2 (4 bytes)
  //                              }
  //                              size: buffer: {} (length 0x0)
  //                            }
  //                            TCA_STAB_DATA: nlattr_t[const[TCA_STAB_DATA,
  //                            int16], array[int16]] {
  //                              nla_len: offsetof = 0x8 (2 bytes)
  //                              nla_type: const = 0x1b (2 bytes)
  //                              payload: array[int16] {
  //                                int16 = 0x0 (2 bytes)
  //                                int16 = 0x0 (2 bytes)
  //                              }
  //                              size: buffer: {} (length 0x0)
  //                            }
  //                          }
  //                        }
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x54 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x4008085 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x8814 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000280 = 0;
  *(uint32_t*)0x200000000288 = 0;
  *(uint64_t*)0x200000000290 = 0x200000000000;
  *(uint64_t*)0x200000000000 = 0x200000000440;
  *(uint32_t*)0x200000000440 = 0x54;
  *(uint16_t*)0x200000000444 = 0x10;
  *(uint16_t*)0x200000000446 = 1;
  *(uint32_t*)0x200000000448 = 0;
  *(uint32_t*)0x20000000044c = 0;
  *(uint8_t*)0x200000000450 = 0;
  *(uint8_t*)0x200000000451 = 0;
  *(uint16_t*)0x200000000452 = 0;
  *(uint32_t*)0x200000000454 = 0;
  *(uint16_t*)0x200000000458 = 0xffe0;
  *(uint16_t*)0x20000000045a = 0;
  *(uint16_t*)0x20000000045c = 0xf;
  *(uint16_t*)0x20000000045e = 6;
  *(uint16_t*)0x200000000460 = 0xe;
  *(uint16_t*)0x200000000462 = 0xd;
  *(uint16_t*)0x200000000464 = 6;
  *(uint16_t*)0x200000000466 = 5;
  *(uint8_t*)0x200000000468 = 9;
  *(uint8_t*)0x200000000469 = 1;
  *(uint16_t*)0x20000000046c = 0x28;
  STORE_BY_BITMASK(uint16_t, , 0x20000000046e, 8, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000000046f, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000000046f, 1, 7, 1);
  *(uint16_t*)0x200000000470 = 0x1c;
  *(uint16_t*)0x200000000472 = 0x1a;
  *(uint8_t*)0x200000000474 = 0;
  *(uint8_t*)0x200000000475 = 0;
  *(uint16_t*)0x200000000476 = 0x491;
  *(uint32_t*)0x200000000478 = 0;
  *(uint32_t*)0x20000000047c = 0;
  *(uint32_t*)0x200000000480 = 0;
  *(uint32_t*)0x200000000484 = 8;
  *(uint32_t*)0x200000000488 = 2;
  *(uint16_t*)0x20000000048c = 8;
  *(uint16_t*)0x20000000048e = 0x1b;
  *(uint16_t*)0x200000000490 = 0;
  *(uint16_t*)0x200000000492 = 0;
  *(uint64_t*)0x200000000008 = 0x54;
  *(uint64_t*)0x200000000298 = 1;
  *(uint64_t*)0x2000000002a0 = 0;
  *(uint64_t*)0x2000000002a8 = 0;
  *(uint32_t*)0x2000000002b0 = 0x4008085;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000280ul,
          /*f=MSG_PROBE|MSG_MORE|MSG_DONTROUTE|MSG_CONFIRM*/ 0x8814ul);
}
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;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}