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Date: Thu, 5 Mar 2020 11:07:56 +0300 From: Dan Carpenter <dan.carpenter@...cle.com> To: Kees Cook <keescook@...omium.org> Cc: "open list:ANDROID DRIVERS" <devel@...verdev.osuosl.org>, Jann Horn <jannh@...gle.com>, Peter Zijlstra <peterz@...radead.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, LKML <linux-kernel@...r.kernel.org>, Arve Hjønnevåg <arve@...roid.com>, Ingo Molnar <mingo@...hat.com>, Alexander Potapenko <glider@...gle.com>, Joe Perches <joe@...ches.com>, Dmitriy Vyukov <dvyukov@...gle.com>, Todd Kjos <tkjos@...gle.com> Subject: Re: [PATCH v2 2/3] binder: do not initialize locals passed to copy_from_user() On Wed, Mar 04, 2020 at 10:13:40AM -0800, Kees Cook wrote: > On Tue, Mar 03, 2020 at 12:38:32PM +0300, Dan Carpenter wrote: > > The real fix is to initialize everything manually, the automated > > initialization is a hardenning feature which many people will disable. > > I cannot disagree more with this sentiment. Linus has specifically said he > wants this initialization on by default[1], Fine, but as long as it's a configurable thing then we need to manually initialize as well or it's still a CVE etc. It will take a while before we drop support for old versions of GCC as well. regards, dan carpenter
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