1. 31 Oct, 2012 1 commit
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  9. 21 Oct, 2012 1 commit
    • Julia Lawall's avatar
      ALSA: sound/isa/opti9xx/miro.c: eliminate possible double free · edb66893
      Julia Lawall authored
      snd_miro_probe is a static function that is only called twice in the file
      that defines it.  At each call site, its argument is freed using
      snd_card_free.  Thus, there is no need for snd_miro_probe to call
      snd_card_free on its argument on any of its error exit paths.
      
      Because snd_card_free both reads the fields of its argument and kfrees its
      argments, the results of the second snd_card_free should be unpredictable.
      
      A simplified version of the semantic match that finds this problem is as
      follows: (http://coccinelle.lip6.fr/)
      
      // <smpl>
      @r@
      identifier f,free,a;
      parameter list[n] ps;
      type T;
      expression e;
      @@
      
      f(ps,T a,...) {
        ... when any
            when != a = e
        if(...) { ... free(a); ... return ...; }
        ... when any
      }
      
      @@
      identifier r.f,r.free;
      expression x,a;
      expression list[r.n] xs;
      @@
      
      * x = f(xs,a,...);
        if (...) { ... free(a); ... return ...; }
      // </smpl>
      Signed-off-by: default avatarJulia Lawall <Julia.Lawall@lip6.fr>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      edb66893
  10. 20 Oct, 2012 19 commits
  11. 19 Oct, 2012 5 commits