lkml.org 
[lkml]   [2018]   [May]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v3 00/16] Provide saturating helpers for allocation
On Thu, May 31, 2018 at 7:43 PM Kees Cook <keescook@chromium.org> wrote:
>
> So, while nothing does:
> kmalloc_array(a, b, ...) -> kmalloc(array_size(a, b), ...)
> the treewide changes DO perform changes like this:
> kmalloc(a * b, ...) -> kmalloc(array_size(a, b), ...)

Ugh. I really really still absolutely despise this.

Why can't you just have a separate set of coccinelle scripts that do
the simple and clean cases?

So *before* doing any array_size() conversions, just do

kzalloc(a*b, ...) -> kcalloc(a, b, ...)
kmalloc(a*b,..) -> kmalloc_array(a,b, ...)

and the obvious variations on that (devm_xyz() has all the same helpers).

Only after doing the ones that don't have the nice obvious helpers, do
the remaining ones with array_size(), ie

*alloc(a*b, ..) -> *alloc(array_size(a,b), ...)

because that really makes for much less legible code.

Hmm?

Linus

\
 
 \ /
  Last update: 2018-06-01 02:55    [W:0.232 / U:0.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site