// https://syzkaller.appspot.com/bug?id=00fadf9a6326e13098672b601d57f644cae380e9
// 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>

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 long syz_open_procfs(volatile long a0, volatile long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == -1) {
    snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1);
  } else {
    snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1);
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  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 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 (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0,
                 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x20000100, "syscall\000", 8);
  syz_open_procfs(0, 0x20000100);
  res = syscall(__NR_socket, 0x10ul, 3ul, 0);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 1ul, 0x803ul, 0);
  if (res != -1)
    r[1] = res;
  *(uint32_t*)0x200002c0 = 0x14;
  res = syscall(__NR_getsockname, r[1], 0x20000100ul, 0x200002c0ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x20000104;
  *(uint64_t*)0x20000080 = 0;
  *(uint32_t*)0x20000088 = 0;
  *(uint64_t*)0x20000090 = 0x20000000;
  *(uint64_t*)0x20000000 = 0x20000440;
  *(uint32_t*)0x20000440 = 0x50;
  *(uint16_t*)0x20000444 = 0x10;
  *(uint16_t*)0x20000446 = 0x401;
  *(uint32_t*)0x20000448 = 0x70bd25;
  *(uint32_t*)0x2000044c = 0x25dfdbfd;
  *(uint8_t*)0x20000450 = 0;
  *(uint8_t*)0x20000451 = 0;
  *(uint16_t*)0x20000452 = 0;
  *(uint32_t*)0x20000454 = r[2];
  *(uint32_t*)0x20000458 = 0;
  *(uint32_t*)0x2000045c = 0;
  *(uint16_t*)0x20000460 = 0x28;
  STORE_BY_BITMASK(uint16_t, , 0x20000462, 0x12, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000463, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000463, 1, 7, 1);
  *(uint16_t*)0x20000464 = 0xb;
  *(uint16_t*)0x20000466 = 1;
  memcpy((void*)0x20000468, "ip6tnl\000", 7);
  *(uint16_t*)0x20000470 = 0x18;
  STORE_BY_BITMASK(uint16_t, , 0x20000472, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000473, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000473, 1, 7, 1);
  *(uint16_t*)0x20000474 = 4;
  *(uint16_t*)0x20000476 = 0x13;
  *(uint16_t*)0x20000478 = 8;
  *(uint16_t*)0x2000047a = 1;
  *(uint32_t*)0x2000047c = 0;
  *(uint16_t*)0x20000480 = 8;
  *(uint16_t*)0x20000482 = 7;
  *(uint32_t*)0x20000484 = 0x800;
  *(uint16_t*)0x20000488 = 8;
  *(uint16_t*)0x2000048a = 3;
  *(uint32_t*)0x2000048c = r[2];
  *(uint64_t*)0x20000008 = 0x50;
  *(uint64_t*)0x20000098 = 1;
  *(uint64_t*)0x200000a0 = 0;
  *(uint64_t*)0x200000a8 = 0;
  *(uint32_t*)0x200000b0 = 0;
  syscall(__NR_sendmsg, r[0], 0x20000080ul, 0x20040000ul);
  res = syscall(__NR_socket, 2ul, 3ul, 1);
  if (res != -1)
    r[3] = res;
  memcpy((void*)0x20001c40,
         "raw\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000",
         32);
  *(uint32_t*)0x20001c60 = 9;
  *(uint32_t*)0x20001c64 = 3;
  *(uint32_t*)0x20001c68 = 0x228;
  *(uint32_t*)0x20001c6c = 0;
  *(uint32_t*)0x20001c70 = 0;
  *(uint32_t*)0x20001c74 = 0xb0;
  *(uint32_t*)0x20001c78 = 0;
  *(uint32_t*)0x20001c7c = 0xb0;
  *(uint32_t*)0x20001c80 = 0x190;
  *(uint32_t*)0x20001c84 = 0x1a8;
  *(uint32_t*)0x20001c88 = 0x1a8;
  *(uint32_t*)0x20001c8c = 0x190;
  *(uint32_t*)0x20001c90 = 0x1a8;
  *(uint32_t*)0x20001c94 = 3;
  *(uint64_t*)0x20001c98 = 0;
  memset((void*)0x20001ca0, 0, 84);
  *(uint32_t*)0x20001cf4 = 0;
  *(uint16_t*)0x20001cf8 = 0x70;
  *(uint16_t*)0x20001cfa = 0xd8;
  *(uint32_t*)0x20001cfc = 0;
  *(uint64_t*)0x20001d00 = 0;
  *(uint64_t*)0x20001d08 = 0;
  *(uint16_t*)0x20001d10 = 0x68;
  memcpy((void*)0x20001d12,
         "CT\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20001d2f = 2;
  *(uint16_t*)0x20001d30 = 1;
  *(uint16_t*)0x20001d32 = 0;
  *(uint32_t*)0x20001d34 = 0;
  *(uint32_t*)0x20001d38 = 0;
  memcpy((void*)0x20001d3c, "netbios-ns\000\000\000\000\000\000", 16);
  memcpy((void*)0x20001d4c,
         "syz1\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000",
         32);
  *(uint64_t*)0x20001d70 = 0;
  *(uint32_t*)0x20001d78 = htobe32(0);
  *(uint8_t*)0x20001d7c = 0xac;
  *(uint8_t*)0x20001d7d = 0x14;
  *(uint8_t*)0x20001d7e = 0x14;
  *(uint8_t*)0x20001d7f = 0;
  *(uint32_t*)0x20001d80 = htobe32(0);
  *(uint32_t*)0x20001d84 = htobe32(0);
  memcpy((void*)0x20001d88, "macvtap0\000\000\000\000\000\000\000\000", 16);
  memcpy((void*)0x20001d98, "vcan0\000\000\000\000\000\000\000\000\000\000\000",
         16);
  *(uint8_t*)0x20001da8 = 0;
  *(uint8_t*)0x20001db8 = 0;
  *(uint16_t*)0x20001dc8 = 0;
  *(uint8_t*)0x20001dca = 0;
  *(uint8_t*)0x20001dcb = 0;
  *(uint32_t*)0x20001dcc = 0;
  *(uint16_t*)0x20001dd0 = 0x70;
  *(uint16_t*)0x20001dd2 = 0xb8;
  *(uint32_t*)0x20001dd4 = 0;
  *(uint64_t*)0x20001dd8 = 0;
  *(uint64_t*)0x20001de0 = 0;
  *(uint16_t*)0x20001de8 = 0x48;
  memcpy((void*)0x20001dea,
         "TEE\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20001e07 = 1;
  *(uint32_t*)0x20001e08 = htobe32(0xe0000001);
  memcpy((void*)0x20001e18, "veth1_to_bridge\000", 16);
  *(uint64_t*)0x20001e28 = 0;
  memset((void*)0x20001e30, 0, 84);
  *(uint32_t*)0x20001e84 = 0;
  *(uint16_t*)0x20001e88 = 0x70;
  *(uint16_t*)0x20001e8a = 0x98;
  *(uint32_t*)0x20001e8c = 0;
  *(uint64_t*)0x20001e90 = 0;
  *(uint64_t*)0x20001e98 = 0;
  *(uint16_t*)0x20001ea0 = 0x28;
  memset((void*)0x20001ea2, 0, 29);
  *(uint8_t*)0x20001ebf = 0;
  *(uint32_t*)0x20001ec0 = 0xfffffffe;
  syscall(__NR_setsockopt, r[3], 0, 0x40, 0x20001c40ul, 0x288ul);
  res = syscall(__NR_socket, 0x10ul, 3ul, 0xc);
  if (res != -1)
    r[4] = res;
  *(uint64_t*)0x20000440 = 0;
  *(uint32_t*)0x20000448 = 0;
  *(uint64_t*)0x20000450 = 0x20000400;
  *(uint64_t*)0x20000400 = 0x20000380;
  *(uint32_t*)0x20000380 = 0x2c;
  *(uint8_t*)0x20000384 = 0;
  *(uint8_t*)0x20000385 = 0xb;
  *(uint16_t*)0x20000386 = 3;
  *(uint32_t*)0x20000388 = 0;
  *(uint32_t*)0x2000038c = 0;
  *(uint8_t*)0x20000390 = 3;
  *(uint8_t*)0x20000391 = 0;
  *(uint16_t*)0x20000392 = htobe16(0);
  *(uint16_t*)0x20000394 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20000396, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000397, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000397, 0, 7, 1);
  *(uint32_t*)0x20000398 = htobe32(0);
  *(uint16_t*)0x2000039c = 5;
  *(uint16_t*)0x2000039e = 1;
  memset((void*)0x200003a0, 0, 1);
  *(uint16_t*)0x200003a4 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x200003a6, 3, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200003a7, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200003a7, 0, 7, 1);
  *(uint32_t*)0x200003a8 = htobe32(0);
  *(uint64_t*)0x20000408 = 0x2c;
  *(uint64_t*)0x20000458 = 1;
  *(uint64_t*)0x20000460 = 0;
  *(uint64_t*)0x20000468 = 0;
  *(uint32_t*)0x20000470 = 0;
  syscall(__NR_sendmsg, r[4], 0x20000440ul, 0ul);
}
int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  loop();
  return 0;
}