linux-kernel - Re: [PATCH 2/2] mm: Add kvmalloc_ab_c and kvzalloc

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Message-ID: <20180308025812.GA9082@bombadil.infradead.org>
Date:   Wed, 7 Mar 2018 18:58:12 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Julia Lawall <julia.lawall@...6.fr>
Cc:     Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        cocci@...teme.lip6.fr, Himanshu Jha <himanshujha199640@...il.com>
Subject: Re: [PATCH 2/2] mm: Add kvmalloc_ab_c and kvzalloc_struct

On Wed, Mar 07, 2018 at 10:18:21PM +0100, Julia Lawall wrote:
> > Otherwise, yes, please. We could build a coccinelle rule for
> > additional replacements...
> 
> A potential semantic patch and the changes it generates are attached
> below.  Himanshu Jha helped with its development.  Working on this
> uncovered one bug, where the allocated array is too large, because the
> size provided for it was a structure size, but actually only pointers to
> that structure were to be stored in it.

This is cool!  Thanks for doing the coccinelle patch!  Diffstat:

 50 files changed, 81 insertions(+), 124 deletions(-)

I find that pretty compelling.  I'll repost the kvmalloc_struct patch
imminently.