// https://syzkaller.appspot.com/bug?id=fb750a9bd66a7111b69a9f7518dc93600ae60006
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if_arp.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/ip.h>
#include <linux/tcp.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_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1)

#define BITMASK_LEN_OFF(type, bf_off, bf_len)                                  \
  (type)(BITMASK_LEN(type, (bf_len)) << (bf_off))

#define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len)                      \
  if ((bf_off) == 0 && (bf_len) == 0) {                                        \
    *(type*)(addr) = (type)(val);                                              \
  } else {                                                                     \
    type new_val = *(type*)(addr);                                             \
    new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len));                     \
    new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off);          \
    *(type*)(addr) = new_val;                                                  \
  }

static void vsnprintf_check(char* str, size_t size, const char* format,
                            va_list args)
{
  int rv;
  rv = vsnprintf(str, size, format, args);
  if (rv < 0)
    exit(1);
  if ((size_t)rv >= size)
    exit(1);
}

#define COMMAND_MAX_LEN 128
#define PATH_PREFIX                                                            \
  "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin "
#define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1)

static void execute_command(bool panic, const char* format, ...)
{
  va_list args;
  char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN];
  int rv;
  va_start(args, format);
  memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN);
  vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args);
  va_end(args);
  rv = system(command);
  if (rv) {
    if (panic)
      exit(1);
  }
}

#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02hx"
#define DEV_MAC "aa:aa:aa:aa:aa:%02hx"

static void snprintf_check(char* str, size_t size, const char* format, ...)
{
  va_list args;
  va_start(args, format);
  vsnprintf_check(str, size, format, args);
  va_end(args);
}
static void initialize_netdevices(void)
{
  unsigned i;
  const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "team"};
  const char* devnames[] = {"lo",
                            "sit0",
                            "bridge0",
                            "vcan0",
                            "tunl0",
                            "gre0",
                            "gretap0",
                            "ip_vti0",
                            "ip6_vti0",
                            "ip6tnl0",
                            "ip6gre0",
                            "ip6gretap0",
                            "erspan0",
                            "bond0",
                            "veth0",
                            "veth1",
                            "team0",
                            "veth0_to_bridge",
                            "veth1_to_bridge",
                            "veth0_to_bond",
                            "veth1_to_bond",
                            "veth0_to_team",
                            "veth1_to_team"};
  const char* devmasters[] = {"bridge", "bond", "team"};
  for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++)
    execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]);
  execute_command(0, "ip link add type veth");
  for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) {
    execute_command(
        0, "ip link add name %s_slave_0 type veth peer name veth0_to_%s",
        devmasters[i], devmasters[i]);
    execute_command(
        0, "ip link add name %s_slave_1 type veth peer name veth1_to_%s",
        devmasters[i], devmasters[i]);
    execute_command(0, "ip link set %s_slave_0 master %s0", devmasters[i],
                    devmasters[i]);
    execute_command(0, "ip link set %s_slave_1 master %s0", devmasters[i],
                    devmasters[i]);
    execute_command(0, "ip link set veth0_to_%s up", devmasters[i]);
    execute_command(0, "ip link set veth1_to_%s up", devmasters[i]);
  }
  execute_command(0, "ip link set bridge_slave_0 up");
  execute_command(0, "ip link set bridge_slave_1 up");
  for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) {
    char addr[32];
    snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10);
    execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10);
    execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10);
    execute_command(0, "ip link set dev %s address %s", devnames[i], addr);
    execute_command(0, "ip link set dev %s up", devnames[i]);
  }
}

static long syz_open_procfs(long a0, 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 setup_common()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 160 << 20;
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
}

int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  setup_common();
  sandbox_common();
  if (unshare(CLONE_NEWNET)) {
  }
  initialize_netdevices();
  loop();
  exit(1);
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  int i;
  for (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) {
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      reset_test();
      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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

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

void execute_one(void)
{
  long res = 0;
  memcpy((void*)0x20000040, "/dev/infiniband/rdma_cm", 24);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000040, 2, 0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x200000c0 = 0;
  *(uint16_t*)0x200000c4 = 0x18;
  *(uint16_t*)0x200000c6 = 0xfa00;
  *(uint64_t*)0x200000c8 = 0;
  *(uint64_t*)0x200000d0 = 0x20000080;
  *(uint16_t*)0x200000d8 = 0x111;
  *(uint8_t*)0x200000da = 0;
  *(uint8_t*)0x200000db = 0;
  *(uint8_t*)0x200000dc = 0;
  *(uint8_t*)0x200000dd = 0;
  *(uint8_t*)0x200000de = 0;
  *(uint8_t*)0x200000df = 0;
  res = syscall(__NR_write, r[0], 0x200000c0, 0x20);
  if (res != -1)
    r[1] = *(uint32_t*)0x20000080;
  *(uint32_t*)0x20000180 = 0xe;
  *(uint16_t*)0x20000184 = 0x18;
  *(uint16_t*)0x20000186 = 0xfa00;
  *(uint64_t*)0x20000188 = 0x20000000;
  *(uint32_t*)0x20000000 = 0;
  *(uint32_t*)0x20000190 = r[1];
  *(uint32_t*)0x20000194 = 0;
  *(uint32_t*)0x20000198 = 2;
  *(uint32_t*)0x2000019c = 4;
  syscall(__NR_write, r[0], 0x20000180, 0x20);
  *(uint32_t*)0x20000100 = 3;
  *(uint16_t*)0x20000104 = 0x40;
  *(uint16_t*)0x20000106 = 0xfa00;
  *(uint16_t*)0x20000108 = 0;
  *(uint16_t*)0x2000010a = htobe16(0);
  *(uint32_t*)0x2000010c = 0;
  *(uint8_t*)0x20000110 = 0xfe;
  *(uint8_t*)0x20000111 = 0x80;
  *(uint8_t*)0x20000112 = 0;
  *(uint8_t*)0x20000113 = 0;
  *(uint8_t*)0x20000114 = 0;
  *(uint8_t*)0x20000115 = 0;
  *(uint8_t*)0x20000116 = 0;
  *(uint8_t*)0x20000117 = 0;
  *(uint8_t*)0x20000118 = 0;
  *(uint8_t*)0x20000119 = 0;
  *(uint8_t*)0x2000011a = 0;
  *(uint8_t*)0x2000011b = 0;
  *(uint8_t*)0x2000011c = 0;
  *(uint8_t*)0x2000011d = 0;
  *(uint8_t*)0x2000011e = 0;
  *(uint8_t*)0x2000011f = 0xbb;
  *(uint32_t*)0x20000120 = 0;
  *(uint16_t*)0x20000124 = 0xa;
  *(uint16_t*)0x20000126 = htobe16(0);
  *(uint32_t*)0x20000128 = 0;
  *(uint8_t*)0x2000012c = 0;
  *(uint8_t*)0x2000012d = 0;
  *(uint8_t*)0x2000012e = 0;
  *(uint8_t*)0x2000012f = 0;
  *(uint8_t*)0x20000130 = 0;
  *(uint8_t*)0x20000131 = 0;
  *(uint8_t*)0x20000132 = 0;
  *(uint8_t*)0x20000133 = 0;
  *(uint8_t*)0x20000134 = 0;
  *(uint8_t*)0x20000135 = 0;
  *(uint8_t*)0x20000136 = 0;
  *(uint8_t*)0x20000137 = 0;
  *(uint8_t*)0x20000138 = 0xc0;
  *(uint8_t*)0x20000139 = 0;
  *(uint8_t*)0x2000013a = 0;
  *(uint8_t*)0x2000013b = 0;
  *(uint32_t*)0x2000013c = 0;
  *(uint32_t*)0x20000140 = r[1];
  *(uint32_t*)0x20000144 = 0;
  syscall(__NR_write, r[0], 0x20000100, 0x48);
  *(uint32_t*)0x20000040 = 1;
  *(uint32_t*)0x20000044 = 0x70;
  *(uint8_t*)0x20000048 = 0;
  *(uint8_t*)0x20000049 = 0;
  *(uint8_t*)0x2000004a = 0;
  *(uint8_t*)0x2000004b = 0;
  *(uint32_t*)0x2000004c = 0;
  *(uint64_t*)0x20000050 = 0x50d;
  *(uint64_t*)0x20000058 = 0;
  *(uint64_t*)0x20000060 = 0;
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 0, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 1, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 2, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 3, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 4, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 5, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 6, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 7, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 8, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 9, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 10, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 11, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 12, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 13, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 14, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 15, 2);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 17, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 18, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 19, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 20, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 21, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 22, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 23, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 24, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 25, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 26, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 27, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 28, 1);
  STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 29, 35);
  *(uint32_t*)0x20000070 = 0;
  *(uint32_t*)0x20000074 = 0;
  *(uint64_t*)0x20000078 = 0x20000000;
  *(uint64_t*)0x20000080 = 0;
  *(uint64_t*)0x20000088 = 0;
  *(uint64_t*)0x20000090 = 0;
  *(uint32_t*)0x20000098 = 0;
  *(uint32_t*)0x2000009c = 0;
  *(uint64_t*)0x200000a0 = 0;
  *(uint32_t*)0x200000a8 = 0;
  *(uint16_t*)0x200000ac = 0;
  *(uint16_t*)0x200000ae = 0;
  syscall(__NR_perf_event_open, 0x20000040, 0, 0, -1, 0);
  *(uint32_t*)0x20000400 = 0;
  syscall(__NR_setsockopt, -1, 0x10e, 1, 0x20000400, 4);
  memcpy((void*)0x20000140, "oom_score_adj", 14);
  res = syz_open_procfs(0, 0x20000140);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x20000240 = 0x5d;
  syscall(__NR_sendfile, r[2], -1, 0x20000240, 0x239ffffffffffff);
  *(uint64_t*)0x20000140 = 0x40000000000009;
  syscall(__NR_sched_setaffinity, 0, 8, 0x20000140);
  *(uint32_t*)0x20000400 = 0;
  syscall(__NR_setsockopt, -1, 0x10e, 1, 0x20000400, 4);
  memcpy((void*)0x20000140, "oom_score_adj", 14);
  res = syz_open_procfs(0, 0x20000140);
  if (res != -1)
    r[3] = res;
  *(uint64_t*)0x20000240 = 0x5d;
  syscall(__NR_sendfile, r[3], -1, 0x20000240, 0x239ffffffffffff);
  res = syscall(__NR_socket, 0x10, 2, 0);
  if (res != -1)
    r[4] = res;
  *(uint64_t*)0x20000100 = 0x20000080;
  *(uint16_t*)0x20000080 = 0x10;
  *(uint16_t*)0x20000082 = 0x7003;
  *(uint32_t*)0x20000084 = 0;
  *(uint32_t*)0x20000088 = 0;
  *(uint32_t*)0x20000108 = 0x80;
  *(uint64_t*)0x20000110 = 0x20000200;
  *(uint64_t*)0x20000200 = 0x20000240;
  memcpy((void*)0x20000240,
         "\x55\x00\x00\x00\x18\x00\x7f\x5e\x00\xfe\x01\xb2\xa4\xa2\x80\x93\x0a"
         "\x60\x08\x00\xff\xa8\x43\x02\x91\x00\x00\x00\x2d\x00\x09\x00\x23\x00"
         "\x0c\x00\x0b\x00\x00\x00\x0d\x00\x05\x00\xfe\x80\x00\x00\x00\x00\xc7"
         "\x8b\x80\x08\x23\x14\xe9\x03\x0b\x9d\x56\x68\x85\xb1\x67\x32\x0b\x00"
         "\xdc\x13\x38\xd5\x44\x00\x00\x9b\x84\x13\x6e\xf7\x5a\xfb\x83\xde\x44",
         85);
  *(uint64_t*)0x20000208 = 0x55;
  *(uint64_t*)0x20000118 = 1;
  *(uint64_t*)0x20000120 = 0x20000080;
  *(uint64_t*)0x20000128 = 0;
  *(uint32_t*)0x20000130 = 0;
  syscall(__NR_sendmsg, r[4], 0x20000100, 0);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  do_sandbox_none();
  return 0;
}