eno.cocci 1.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /// The various basic memory allocation functions don't return ERR_PTR
  3. ///
  4. // Confidence: High
  5. // Copyright: (C) 2010-2012 Nicolas Palix.
  6. // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.
  7. // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.
  8. // URL: https://coccinelle.gitlabpages.inria.fr/website
  9. // Comments:
  10. // Options: --no-includes --include-headers
  11. virtual patch
  12. virtual context
  13. virtual org
  14. virtual report
  15. @depends on patch@
  16. expression x,E;
  17. @@
  18. x = \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)
  19. ... when != x = E
  20. - IS_ERR(x)
  21. + !x
  22. @r depends on !patch exists@
  23. expression x,E;
  24. position p1,p2;
  25. @@
  26. *x = \(kmalloc@p1\|kzalloc@p1\|kcalloc@p1\|kmem_cache_alloc@p1\|kmem_cache_zalloc@p1\|kmem_cache_alloc_node@p1\|kmalloc_node@p1\|kzalloc_node@p1\)(...)
  27. ... when != x = E
  28. * IS_ERR@p2(x)
  29. @script:python depends on org@
  30. p1 << r.p1;
  31. p2 << r.p2;
  32. @@
  33. cocci.print_main("alloc call",p1)
  34. cocci.print_secs("IS_ERR that should be NULL tests",p2)
  35. @script:python depends on report@
  36. p1 << r.p1;
  37. p2 << r.p2;
  38. @@
  39. msg = "ERROR: allocation function on line %s returns NULL not ERR_PTR on failure" % (p1[0].line)
  40. coccilib.report.print_report(p2[0], msg)