Re: [PATCH] [DISCUSS] Make the variable NULL after freeing it.

From: YOSHIFUJI Hideaki / 吉藤英明
Date: Sun Dec 31 2006 - 20:08:00 EST

In article <200701010143.02870.ioe-lkml@xxxxxxxxxx> (at Mon, 1 Jan 2007 01:43:00 +0100), Ingo Oeser <ioe-lkml@xxxxxxxxxx> says:

> On Sunday, 31. December 2006 14:38, Bernd Petrovitsch wrote:
> > That depends on the decision/definition if (so called) "double free" is
> > an error or not (and "free(NULL)" must work in POSIX-compliant
> > environments).
> A double free of non-NULL is certainly an error.
> So the idea of setting it to NULL is ok, since then you can
> kfree the variable over and over again without any harm.

I dislike (or, say, I hate) this idea; people should fix up
such broken code paths.

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