Who Says C is Simple?

Re:Who Says C is Simple? by anon1385 on Wednesday July 17, 2013 @03:09PM (#6059575)

Even if you don't do something like that a modern C compiler will do all sorts of things behind your back. Like removing null checks[1] or pointer overflow checks[2]

[1] http://www.cvedetails.com/cve/CVE-2009-1897

[2] http://www.cvedetails.com/cve/CVE-2008-1685

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Re:Who Says C is Simple? by rapala on Thursday July 18, 2013 @05:13AM (#6062579)

Well, to be fair, the NULL check was in a wrong place. The pointer was already dereferenced before the check.

  struct tun_struct *tun = __tun_get(tfile);
  struct sock *sk = tun->sk;
  unsigned int mask = 0;
  
  if (!tun)
    return POLLERR;

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