syzkaller-repros/linux/41cd42cb159de1cbed921865f1323987fd6fe628.c

// suspicious RCU usage at net/ipv6/ip6_fib.c:LINE
// https://syzkaller.appspot.com/bug?id=41cd42cb159de1cbed921865f1323987fd6fe628
// status:fixed
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <stdint.h>
#include <string.h>
#include <sys/syscall.h>
#include <unistd.h>

static void test();

void loop()
{
  while (1) {
    test();
  }
}

long r[3];
void test()
{
  memset(r, -1, sizeof(r));
  syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0);
  r[0] = syscall(__NR_socket, 0xa, 2, 0);
  memcpy((void*)0x20190fd8,
         "\x73\x69\x74\x30\x00\x00\xfb\xff\x00\x00\x00\x00\x00\x00\x00\x00",
         16);
  *(uint32_t*)0x20190fe8 = 0;
  *(uint8_t*)0x20190fec = 0;
  *(uint8_t*)0x20190fed = 0;
  *(uint8_t*)0x20190fee = 0;
  *(uint8_t*)0x20190fef = 0;
  *(uint8_t*)0x20190ff0 = 0;
  *(uint8_t*)0x20190ff1 = 0;
  *(uint8_t*)0x20190ff2 = 0;
  *(uint8_t*)0x20190ff3 = 0;
  *(uint8_t*)0x20190ff4 = 0;
  *(uint8_t*)0x20190ff5 = 0;
  *(uint8_t*)0x20190ff6 = 0;
  *(uint8_t*)0x20190ff7 = 0;
  *(uint8_t*)0x20190ff8 = 0;
  *(uint8_t*)0x20190ff9 = 0;
  *(uint8_t*)0x20190ffa = 0;
  *(uint8_t*)0x20190ffb = 0;
  *(uint8_t*)0x20190ffc = 0;
  *(uint8_t*)0x20190ffd = 0;
  *(uint8_t*)0x20190ffe = 0;
  *(uint8_t*)0x20190fff = 0;
  if (syscall(__NR_ioctl, r[0], 0x8933, 0x20190fd8) != -1)
    r[1] = *(uint32_t*)0x20190fe8;
  *(uint8_t*)0x20c0cfb0 = 0xfe;
  *(uint8_t*)0x20c0cfb1 = 0x80;
  *(uint8_t*)0x20c0cfb2 = 0;
  *(uint8_t*)0x20c0cfb3 = 0;
  *(uint8_t*)0x20c0cfb4 = 0;
  *(uint8_t*)0x20c0cfb5 = 0;
  *(uint8_t*)0x20c0cfb6 = 0;
  *(uint8_t*)0x20c0cfb7 = 0;
  *(uint8_t*)0x20c0cfb8 = 0;
  *(uint8_t*)0x20c0cfb9 = 0;
  *(uint8_t*)0x20c0cfba = 0;
  *(uint8_t*)0x20c0cfbb = 0;
  *(uint8_t*)0x20c0cfbc = 0;
  *(uint8_t*)0x20c0cfbd = 0;
  *(uint8_t*)0x20c0cfbe = 0;
  *(uint8_t*)0x20c0cfbf = 0xaa;
  *(uint64_t*)0x20c0cfc0 = htobe64(0);
  *(uint64_t*)0x20c0cfc8 = htobe64(1);
  *(uint64_t*)0x20c0cfd0 = htobe64(0);
  *(uint64_t*)0x20c0cfd8 = htobe64(1);
  *(uint32_t*)0x20c0cfe0 = 0;
  *(uint16_t*)0x20c0cfe4 = 0;
  *(uint16_t*)0x20c0cfe6 = 0;
  *(uint32_t*)0x20c0cfe8 = -1;
  *(uint64_t*)0x20c0cff0 = 0;
  *(uint32_t*)0x20c0cff8 = 0x400000;
  *(uint32_t*)0x20c0cffc = r[1];
  syscall(__NR_ioctl, r[0], 0x890b, 0x20c0cfb0);
  r[2] = syscall(__NR_socket, 0x10, 3, 0);
  *(uint64_t*)0x20bb2000 = 0x20447fd7;
  *(uint64_t*)0x20bb2008 = 0x29;
  memcpy((void*)0x20447fd7, "\x29\x00\x00\x00\x18\x00\x31\x15\xff\xff\xef\x00"
                            "\x00\xc5\x0a\x17\x0a\x80\x00\x66\x01\x6d\x00\x09"
                            "\x99\x98\xff\xbf\x08\x00\x08\x00\x04\x00\x01\x00"
                            "\x0e\xf4\xff\x01\xff",
         41);
  syscall(__NR_writev, r[2], 0x20bb2000, 1);
}

int main()
{
  for (;;) {
    loop();
  }
}