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

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if_arp.h>
#include <sched.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 <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 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 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);
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void loop(void)
{
  long res = 0;
  res = syscall(__NR_socket, 0x10, 2, 0);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000100 = 0x20000080;
  *(uint16_t*)0x20000080 = 0x10;
  *(uint16_t*)0x20000082 = 0;
  *(uint32_t*)0x20000084 = 0;
  *(uint32_t*)0x20000088 = 0;
  *(uint32_t*)0x20000108 = 0x80;
  *(uint64_t*)0x20000110 = 0x20000200;
  *(uint64_t*)0x20000200 = 0x20000180;
  memcpy((void*)0x20000180,
         "\x55\x00\x00\x00\x18\x00\x7f\x70\x00\xfe\x01\xb2\xa4\xa2\x80\x93\x0a"
         "\x60\x05\x00\x00\xa8\x43\x02\x91\x00\x00\x00\x39\x00\x09\x00\x23\x00"
         "\x0c\x00\x0b\x00\x00\x00\x1b\x00\x05\x00\x03\x00\x00\x00\x00\x40\xc7"
         "\x8b\x80\x08\x23\x14\xe9\x03\x0b\x9d\x56\x68\x85\xb1\x67\x32\x00\x9b"
         "\x14\x00\xb1\xdf\x13\x6e\xf7\x5a\xfb\x00\x00\x00\x00\x00\x00\x00\x00",
         85);
  *(uint64_t*)0x20000208 = 0x55;
  *(uint64_t*)0x20000118 = 1;
  *(uint64_t*)0x20000120 = 0x20000400;
  *(uint64_t*)0x20000128 = 0;
  *(uint32_t*)0x20000130 = 0;
  syscall(__NR_sendmsg, r[0], 0x20000100, 0);
  memcpy((void*)0x20000040, "/dev/infiniband/rdma_cm", 24);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000040, 2, 0);
  if (res != -1)
    r[1] = 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[1], 0x200000c0, 0x20);
  if (res != -1)
    r[2] = *(uint32_t*)0x20000080;
  *(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[2];
  *(uint32_t*)0x20000144 = 0;
  syscall(__NR_write, r[1], 0x20000100, 0x48);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  do_sandbox_none();
  return 0;
}