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Message-Id: <20180214182618.14627-1-willy@infradead.org>
Date: Wed, 14 Feb 2018 10:26:16 -0800
From: Matthew Wilcox <willy@...radead.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Matthew Wilcox <mawilcox@...rosoft.com>,
linux-mm@...ck.org,
Kees Cook <keescook@...omium.org>,
linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: [PATCH 0/2] Add kvzalloc_struct to complement kvzalloc_array
From: Matthew Wilcox <mawilcox@...rosoft.com>
We all know the perils of multiplying a value provided from userspace
by a constant and then allocating the resulting number of bytes. That's
why we have kvmalloc_array(), so we don't have to think about it.
This solves the same problem when we embed one of these arrays in a
struct like this:
struct {
int n;
unsigned long array[];
};
Using kvzalloc_struct() to allocate this will save precious thinking
time and reduce the possibilities of bugs.
Matthew Wilcox (2):
mm: Add kernel-doc for kvfree
mm: Add kvmalloc_ab_c and kvzalloc_struct
include/linux/mm.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
mm/util.c | 10 ++++++++++
2 files changed, 61 insertions(+)
--
2.15.1
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