syzkaller-repros/linux/b99a32e971368f716992e75d20025d2f2b1dd8bc.c

// BUG: corrupted list in nf_tables_commit
// https://syzkaller.appspot.com/bug?id=b99a32e971368f716992e75d20025d2f2b1dd8bc
// status:open
// 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 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) {
  }
}

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;
  for (iter = 0;; 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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0xcul);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20003ac0 = 0;
  *(uint32_t*)0x20003ac8 = 0;
  *(uint64_t*)0x20003ad0 = 0x20003a80;
  *(uint64_t*)0x20003a80 = 0x20003940;
  *(uint32_t*)0x20003940 = 0x14;
  *(uint16_t*)0x20003944 = 0x10;
  *(uint16_t*)0x20003946 = 1;
  *(uint32_t*)0x20003948 = 0;
  *(uint32_t*)0x2000394c = 0;
  *(uint8_t*)0x20003950 = 0;
  *(uint8_t*)0x20003951 = 0;
  *(uint16_t*)0x20003952 = htobe16(0xa);
  *(uint32_t*)0x20003954 = 0xe0;
  *(uint8_t*)0x20003958 = 0x18;
  *(uint8_t*)0x20003959 = 0xa;
  *(uint16_t*)0x2000395a = 0x101;
  *(uint32_t*)0x2000395c = 0;
  *(uint32_t*)0x20003960 = 0;
  *(uint8_t*)0x20003964 = 1;
  *(uint8_t*)0x20003965 = 0;
  *(uint16_t*)0x20003966 = htobe16(0);
  *(uint16_t*)0x20003968 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x2000396a, 7, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000396b, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000396b, 0, 7, 1);
  *(uint32_t*)0x2000396c = htobe32(3);
  *(uint16_t*)0x20003970 = 0xc;
  STORE_BY_BITMASK(uint16_t, , 0x20003972, 5, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20003973, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20003973, 0, 7, 1);
  *(uint64_t*)0x20003974 = htobe64(1);
  *(uint16_t*)0x2000397c = 8;
  STORE_BY_BITMASK(uint16_t, , 0x2000397e, 7, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000397f, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000397f, 0, 7, 1);
  *(uint32_t*)0x20003980 = htobe32(1);
  *(uint16_t*)0x20003984 = 0xa4;
  STORE_BY_BITMASK(uint16_t, , 0x20003986, 3, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20003987, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20003987, 1, 7, 1);
  *(uint16_t*)0x20003988 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x2000398a, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000398b, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000398b, 0, 7, 1);
  *(uint32_t*)0x2000398c = htobe32(0);
  *(uint16_t*)0x20003990 = 0x68;
  STORE_BY_BITMASK(uint16_t, , 0x20003992, 3, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20003993, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20003993, 1, 7, 1);
  *(uint16_t*)0x20003994 = 0x14;
  *(uint16_t*)0x20003996 = 1;
  memcpy((void*)0x20003998, "veth0_vlan\000\000\000\000\000\000", 16);
  *(uint16_t*)0x200039a8 = 0x14;
  *(uint16_t*)0x200039aa = 1;
  memcpy((void*)0x200039ac, "bond0\000\000\000\000\000\000\000\000\000\000\000",
         16);
  *(uint16_t*)0x200039bc = 0x14;
  *(uint16_t*)0x200039be = 1;
  memcpy((void*)0x200039c0, "ip6gretap0\000\000\000\000\000\000", 16);
  *(uint16_t*)0x200039d0 = 0x14;
  *(uint16_t*)0x200039d2 = 1;
  memcpy((void*)0x200039d4, "gretap0\000\000\000\000\000\000\000\000\000", 16);
  *(uint16_t*)0x200039e4 = 0x14;
  *(uint16_t*)0x200039e6 = 1;
  memcpy((void*)0x200039e8,
         "lo\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16);
  *(uint16_t*)0x200039f8 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x200039fa, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200039fb, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200039fb, 0, 7, 1);
  *(uint32_t*)0x200039fc = htobe32(5);
  *(uint16_t*)0x20003a00 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20003a02, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20003a03, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20003a03, 0, 7, 1);
  *(uint32_t*)0x20003a04 = htobe32(0);
  *(uint16_t*)0x20003a08 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20003a0a, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20003a0b, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20003a0b, 0, 7, 1);
  *(uint32_t*)0x20003a0c = htobe32(0);
  *(uint16_t*)0x20003a10 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20003a12, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20003a13, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20003a13, 0, 7, 1);
  *(uint32_t*)0x20003a14 = htobe32(0);
  *(uint16_t*)0x20003a18 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20003a1a, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20003a1b, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20003a1b, 0, 7, 1);
  *(uint32_t*)0x20003a1c = htobe32(0);
  *(uint16_t*)0x20003a20 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20003a22, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20003a23, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20003a23, 0, 7, 1);
  *(uint32_t*)0x20003a24 = htobe32(4);
  *(uint16_t*)0x20003a28 = 9;
  *(uint16_t*)0x20003a2a = 1;
  memcpy((void*)0x20003a2c, "syz0\000", 5);
  *(uint32_t*)0x20003a34 = 0x2c;
  *(uint8_t*)0x20003a38 = 2;
  *(uint8_t*)0x20003a39 = 0xa;
  *(uint16_t*)0x20003a3a = 0x101;
  *(uint32_t*)0x20003a3c = 0;
  *(uint32_t*)0x20003a40 = 0;
  *(uint8_t*)0x20003a44 = 0;
  *(uint8_t*)0x20003a45 = 0;
  *(uint16_t*)0x20003a46 = htobe16(1);
  *(uint16_t*)0x20003a48 = 9;
  *(uint16_t*)0x20003a4a = 1;
  memcpy((void*)0x20003a4c, "syz0\000", 5);
  *(uint16_t*)0x20003a54 = 9;
  *(uint16_t*)0x20003a56 = 1;
  memcpy((void*)0x20003a58, "syz0\000", 5);
  *(uint32_t*)0x20003a60 = 0x14;
  *(uint16_t*)0x20003a64 = 0x11;
  *(uint16_t*)0x20003a66 = 1;
  *(uint32_t*)0x20003a68 = 0;
  *(uint32_t*)0x20003a6c = 0;
  *(uint8_t*)0x20003a70 = 0;
  *(uint8_t*)0x20003a71 = 0;
  *(uint16_t*)0x20003a72 = htobe16(0xa);
  *(uint64_t*)0x20003a88 = 0x134;
  *(uint64_t*)0x20003ad8 = 1;
  *(uint64_t*)0x20003ae0 = 0;
  *(uint64_t*)0x20003ae8 = 0;
  *(uint32_t*)0x20003af0 = 0x4000800;
  syscall(__NR_sendmsg, r[0], 0x20003ac0ul, 0x42ul);
  *(uint64_t*)0x20003e00 = 0;
  *(uint32_t*)0x20003e08 = 0;
  *(uint64_t*)0x20003e10 = 0x20003dc0;
  *(uint64_t*)0x20003dc0 = 0x20000200;
  *(uint32_t*)0x20000200 = 0x14;
  *(uint16_t*)0x20000204 = 0x10;
  *(uint16_t*)0x20000206 = 1;
  *(uint32_t*)0x20000208 = 0;
  *(uint32_t*)0x2000020c = 0;
  *(uint8_t*)0x20000210 = 0;
  *(uint8_t*)0x20000211 = 0;
  *(uint16_t*)0x20000212 = htobe16(0xa);
  *(uint32_t*)0x20000214 = 0x20;
  *(uint8_t*)0x20000218 = 0;
  *(uint8_t*)0x20000219 = 0xa;
  *(uint16_t*)0x2000021a = 0x1405;
  *(uint32_t*)0x2000021c = 0;
  *(uint32_t*)0x20000220 = 0;
  *(uint8_t*)0x20000224 = 1;
  *(uint8_t*)0x20000225 = 0;
  *(uint16_t*)0x20000226 = htobe16(0);
  *(uint16_t*)0x20000228 = 9;
  *(uint16_t*)0x2000022a = 1;
  memcpy((void*)0x2000022c, "syz0\000", 5);
  *(uint32_t*)0x20000234 = 0x58;
  *(uint8_t*)0x20000238 = 0x16;
  *(uint8_t*)0x20000239 = 0xa;
  *(uint16_t*)0x2000023a = 1;
  *(uint32_t*)0x2000023c = 0;
  *(uint32_t*)0x20000240 = 0;
  *(uint8_t*)0x20000244 = 1;
  *(uint8_t*)0x20000245 = 0;
  *(uint16_t*)0x20000246 = htobe16(0);
  *(uint16_t*)0x20000248 = 9;
  *(uint16_t*)0x2000024a = 1;
  memcpy((void*)0x2000024c, "syz0\000", 5);
  *(uint16_t*)0x20000254 = 9;
  *(uint16_t*)0x20000256 = 2;
  memcpy((void*)0x20000258, "syz2\000", 5);
  *(uint16_t*)0x20000260 = 0x2c;
  STORE_BY_BITMASK(uint16_t, , 0x20000262, 3, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000263, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000263, 1, 7, 1);
  *(uint16_t*)0x20000264 = 0x18;
  STORE_BY_BITMASK(uint16_t, , 0x20000266, 3, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000267, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000267, 1, 7, 1);
  *(uint16_t*)0x20000268 = 0x14;
  *(uint16_t*)0x2000026a = 1;
  memcpy((void*)0x2000026c,
         "lo\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16);
  *(uint16_t*)0x2000027c = 8;
  STORE_BY_BITMASK(uint16_t, , 0x2000027e, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000027f, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000027f, 0, 7, 1);
  *(uint32_t*)0x20000280 = htobe32(0);
  *(uint16_t*)0x20000284 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20000286, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000287, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000287, 0, 7, 1);
  *(uint32_t*)0x20000288 = htobe32(0);
  *(uint32_t*)0x2000028c = 0x14;
  *(uint16_t*)0x20000290 = 0x11;
  *(uint16_t*)0x20000292 = 1;
  *(uint32_t*)0x20000294 = 0;
  *(uint32_t*)0x20000298 = 0;
  *(uint8_t*)0x2000029c = 0;
  *(uint8_t*)0x2000029d = 0;
  *(uint16_t*)0x2000029e = htobe16(0xa);
  *(uint64_t*)0x20003dc8 = 0xa0;
  *(uint64_t*)0x20003e18 = 1;
  *(uint64_t*)0x20003e20 = 0;
  *(uint64_t*)0x20003e28 = 0;
  *(uint32_t*)0x20003e30 = 0;
  syscall(__NR_sendmsg, r[0], 0x20003e00ul, 0ul);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0);
  loop();
  return 0;
}