syzkaller-repros/linux/924f61f6084bdb25ca671dde359fadfabe976b05.c

// BUG: unable to handle kernel NULL pointer dereference in sock_poll
// https://syzkaller.appspot.com/bug?id=924f61f6084bdb25ca671dde359fadfabe976b05
// status:dup
// 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>

uint64_t r[1] = {0xffffffffffffffff};
void loop()
{
  long res = 0;
  res = syscall(__NR_socket, 0x2b, 1, 0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20000040 = r[0];
  *(uint16_t*)0x20000044 = 0;
  *(uint16_t*)0x20000046 = 0;
  syscall(__NR_poll, 0x20000040, 1, 3);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  loop();
  return 0;
}