// 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 <setjmp.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>

static unsigned long long procid;

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

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 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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0x0};

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[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {14 00 00 00 26 00 01 00 fd ff 07 00 00
  //                  10 00 00 06} (length 0x11)
  //                }
  //              }
  //            }
  //            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 = 0x8040 (8 bytes)
  //  ]
  NONFAILING(*(uint64_t*)0x200000000140 = 0);
  NONFAILING(*(uint32_t*)0x200000000148 = 0);
  NONFAILING(*(uint64_t*)0x200000000150 = 0x200000000000);
  NONFAILING(*(uint64_t*)0x200000000000 = 0x200000000740);
  NONFAILING(memcpy(
      (void*)0x200000000740,
      "\x14\x00\x00\x00\x26\x00\x01\x00\xfd\xff\x07\x00\x00\x10\x00\x00\x06",
      17));
  NONFAILING(*(uint64_t*)0x200000000008 = 0x14);
  NONFAILING(*(uint64_t*)0x200000000158 = 1);
  NONFAILING(*(uint64_t*)0x200000000160 = 0);
  NONFAILING(*(uint64_t*)0x200000000168 = 0);
  NONFAILING(*(uint32_t*)0x200000000170 = 0x400c801);
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000140ul,
          /*f=MSG_MORE|MSG_DONTWAIT*/ 0x8040ul);
  //  socket arguments: [
  //    domain: socket_domain = 0x10 (8 bytes)
  //    type: socket_type = 0x3 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  res = syscall(__NR_socket, /*domain=AF_NETLINK*/ 0x10ul,
                /*type=SOCK_RAW*/ 3ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  socketpair$unix arguments: [
  //    domain: const = 0x1 (8 bytes)
  //    type: unix_socket_type = 0x5 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //    fds: ptr[out, unix_pair] {
  //      unix_pair {
  //        fd0: sock_unix (resource)
  //        fd1: sock_unix (resource)
  //      }
  //    }
  //  ]
  res = syscall(__NR_socketpair, /*domain=*/1ul, /*type=SOCK_SEQPACKET*/ 5ul,
                /*proto=*/0, /*fds=*/0x200000000240ul);
  if (res != -1)
    NONFAILING(r[2] = *(uint32_t*)0x200000000244);
  //  ioctl$sock_SIOCGIFINDEX arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8933 (4 bytes)
  //    arg: ptr[out, ifreq_dev_t[devnames, ifindex]] {
  //      ifreq_dev_t[devnames, ifindex] {
  //        ifr_ifrn: buffer: {6c 6f 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes)
  //      }
  //    }
  //  ]
  NONFAILING(
      memcpy((void*)0x200000000000,
             "lo\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16));
  res = syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x8933,
                /*arg=*/0x200000000000ul);
  if (res != -1)
    NONFAILING(r[3] = *(uint32_t*)0x200000000010);
  //  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 = 0x60 (4 bytes)
  //                  type: const = 0x24 (2 bytes)
  //                  flags: netlink_msg_flags = 0xd0f (2 bytes)
  //                  seq: int32 = 0x70bd2d (4 bytes)
  //                  pid: int32 = 0x0 (4 bytes)
  //                  payload: tcmsg[AF_UNSPEC] {
  //                    family: const = 0x60 (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 = 0x0 (2 bytes)
  //                      major: tcm_handle_offsets = 0xa (2 bytes)
  //                    }
  //                    tcm_parent: tcm_handle {
  //                      minor: tcm_handle_offsets = 0xffff (2 bytes)
  //                      major: tcm_handle_offsets = 0xffff (2 bytes)
  //                    }
  //                    tcm_info: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
  //                      major: tcm_handle_offsets = 0xffff (2 bytes)
  //                    }
  //                  }
  //                  attrs: array[rtm_tca_policy] {
  //                    union rtm_tca_policy {
  //                      qdisc_kind_options: union qdisc_kind_options {
  //                        q_tbf: tca_kind_options_t["tbf", array[tbf_policy]]
  //                        {
  //                          TCA_KIND: nlattr_t[const[TCA_KIND, int16],
  //                          string["tbf"]] {
  //                            nla_len: offsetof = 0x8 (2 bytes)
  //                            nla_type: const = 0x1 (2 bytes)
  //                            payload: buffer: {74 62 66 00} (length 0x4)
  //                            size: buffer: {} (length 0x0)
  //                          }
  //                          TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16],
  //                          array[tbf_policy]] {
  //                            nla_len: offsetof = 0x34 (2 bytes)
  //                            nla_type: const = 0x2 (2 bytes)
  //                            payload: array[tbf_policy] {
  //                              union tbf_policy {
  //                                TCA_TBF_PARMS: nlattr_t[const[TCA_TBF_PARMS,
  //                                int16], tc_tbf_qopt] {
  //                                  nla_len: offsetof = 0x28 (2 bytes)
  //                                  nla_type: const = 0x1 (2 bytes)
  //                                  payload: tc_tbf_qopt {
  //                                    rate: tc_ratespec {
  //                                      cell_log: int8 = 0xea (1 bytes)
  //                                      linklayer: linklayer = 0x0 (1 bytes)
  //                                      overhead: int16 = 0xfffd (2 bytes)
  //                                      cell_align: int16 = 0x0 (2 bytes)
  //                                      mpu: int16 = 0x9 (2 bytes)
  //                                      rate: int32 = 0x5 (4 bytes)
  //                                    }
  //                                    peakrate: tc_ratespec {
  //                                      cell_log: int8 = 0x12 (1 bytes)
  //                                      linklayer: linklayer = 0x2 (1 bytes)
  //                                      overhead: int16 = 0x0 (2 bytes)
  //                                      cell_align: int16 = 0x401 (2 bytes)
  //                                      mpu: int16 = 0x8001 (2 bytes)
  //                                      rate: int32 = 0x1400 (4 bytes)
  //                                    }
  //                                    limit: int32 = 0xa5 (4 bytes)
  //                                    buffer: int32 = 0x5 (4 bytes)
  //                                    mtu: int32 = 0x10000000 (4 bytes)
  //                                  }
  //                                  size: buffer: {} (length 0x0)
  //                                }
  //                              }
  //                              union tbf_policy {
  //                                TCA_TBF_BURST: nlattr_t[const[TCA_TBF_BURST,
  //                                int16], int32] {
  //                                  nla_len: offsetof = 0x8 (2 bytes)
  //                                  nla_type: const = 0x6 (2 bytes)
  //                                  payload: int32 = 0x8057 (4 bytes)
  //                                  size: buffer: {} (length 0x0)
  //                                }
  //                              }
  //                            }
  //                            size: buffer: {} (length 0x0)
  //                          }
  //                        }
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x60 (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 = 0x44080 (8 bytes)
  //  ]
  NONFAILING(*(uint64_t*)0x200000000040 = 0);
  NONFAILING(*(uint32_t*)0x200000000048 = 0);
  NONFAILING(*(uint64_t*)0x200000000050 = 0x200000000780);
  NONFAILING(*(uint64_t*)0x200000000780 = 0x200000000080);
  NONFAILING(*(uint32_t*)0x200000000080 = 0x60);
  NONFAILING(*(uint16_t*)0x200000000084 = 0x24);
  NONFAILING(*(uint16_t*)0x200000000086 = 0xd0f);
  NONFAILING(*(uint32_t*)0x200000000088 = 0x70bd2d);
  NONFAILING(*(uint32_t*)0x20000000008c = 0);
  NONFAILING(*(uint8_t*)0x200000000090 = 0x60);
  NONFAILING(*(uint8_t*)0x200000000091 = 0);
  NONFAILING(*(uint16_t*)0x200000000092 = 0);
  NONFAILING(*(uint32_t*)0x200000000094 = r[3]);
  NONFAILING(*(uint16_t*)0x200000000098 = 0);
  NONFAILING(*(uint16_t*)0x20000000009a = 0xa);
  NONFAILING(*(uint16_t*)0x20000000009c = -1);
  NONFAILING(*(uint16_t*)0x20000000009e = -1);
  NONFAILING(*(uint16_t*)0x2000000000a0 = 0);
  NONFAILING(*(uint16_t*)0x2000000000a2 = -1);
  NONFAILING(*(uint16_t*)0x2000000000a4 = 8);
  NONFAILING(*(uint16_t*)0x2000000000a6 = 1);
  NONFAILING(memcpy((void*)0x2000000000a8, "tbf\000", 4));
  NONFAILING(*(uint16_t*)0x2000000000ac = 0x34);
  NONFAILING(*(uint16_t*)0x2000000000ae = 2);
  NONFAILING(*(uint16_t*)0x2000000000b0 = 0x28);
  NONFAILING(*(uint16_t*)0x2000000000b2 = 1);
  NONFAILING(*(uint8_t*)0x2000000000b4 = 0xea);
  NONFAILING(*(uint8_t*)0x2000000000b5 = 0);
  NONFAILING(*(uint16_t*)0x2000000000b6 = 0xfffd);
  NONFAILING(*(uint16_t*)0x2000000000b8 = 0);
  NONFAILING(*(uint16_t*)0x2000000000ba = 9);
  NONFAILING(*(uint32_t*)0x2000000000bc = 5);
  NONFAILING(*(uint8_t*)0x2000000000c0 = 0x12);
  NONFAILING(*(uint8_t*)0x2000000000c1 = 2);
  NONFAILING(*(uint16_t*)0x2000000000c2 = 0);
  NONFAILING(*(uint16_t*)0x2000000000c4 = 0x401);
  NONFAILING(*(uint16_t*)0x2000000000c6 = 0x8001);
  NONFAILING(*(uint32_t*)0x2000000000c8 = 0x1400);
  NONFAILING(*(uint32_t*)0x2000000000cc = 0xa5);
  NONFAILING(*(uint32_t*)0x2000000000d0 = 5);
  NONFAILING(*(uint32_t*)0x2000000000d4 = 0x10000000);
  NONFAILING(*(uint16_t*)0x2000000000d8 = 8);
  NONFAILING(*(uint16_t*)0x2000000000da = 6);
  NONFAILING(*(uint32_t*)0x2000000000dc = 0x8057);
  NONFAILING(*(uint64_t*)0x200000000788 = 0x60);
  NONFAILING(*(uint64_t*)0x200000000058 = 1);
  NONFAILING(*(uint64_t*)0x200000000060 = 0);
  NONFAILING(*(uint64_t*)0x200000000068 = 0);
  NONFAILING(*(uint32_t*)0x200000000070 = 0);
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000040ul,
          /*f=MSG_BATCH|MSG_NOSIGNAL|MSG_EOR*/ 0x44080ul);
}
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;
  install_segv_handler();
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}