Messages in this thread | | | Date | Mon, 8 Jan 2007 11:26:17 +0200 | From | "Pekka Enberg" <> | Subject | Re: [PATCH] include/linux/slab.h: new KFREE() macro. |
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On 1/8/07, Amit Choudhary <amit2030@yahoo.com> wrote: > It is a programming error because the underlying code cannot handle it.
Yes. Do you also grasp the fact that there is no way for the allocator to handle it either? So, double-free, from allocator standpoint can _never_ be no-op.
What you're proposing is _not_ making double-free no-op, but instead, making sure we never have a reference to p after kfree(p). However, (1) that bloats the kernel text and (2) doesn't actually guarantee that there are _no_ references to p (you can have an alias q for it, but there's no way for us to know that). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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