/// The various basic memory allocation functions don't return ERR_PTR
  ///
  // Confidence: High

  // Copyright: (C) 2010-2012 Nicolas Palix.  GPLv2.
  // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.  GPLv2.
  // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.  GPLv2.

  // URL: http://coccinelle.lip6.fr/
  // Comments:
  // Options: -no_includes -include_headers
  
  virtual patch

  virtual context
  virtual org
  virtual report

  @depends on patch@

  expression x,E;
  @@
  
  x = \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)
  ... when != x = E
  - IS_ERR(x)
  + !x

  
  @r depends on !patch exists@
  expression x,E;
  position p1,p2;
  @@
  
  *x = \(kmalloc@p1\|kzalloc@p1\|kcalloc@p1\|kmem_cache_alloc@p1\|kmem_cache_zalloc@p1\|kmem_cache_alloc_node@p1\|kmalloc_node@p1\|kzalloc_node@p1\)(...)
  ... when != x = E
  * IS_ERR@p2(x)
  
  @script:python depends on org@
  p1 << r.p1;
  p2 << r.p2;
  @@
  
  cocci.print_main("alloc call",p1)
  cocci.print_secs("IS_ERR that should be NULL tests",p2)
  
  @script:python depends on report@
  p1 << r.p1;
  p2 << r.p2;
  @@
  
  msg = "ERROR: allocation function on line %s returns NULL not ERR_PTR on failure" % (p1[0].line)
  coccilib.report.print_report(p2[0], msg)