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Message-ID: <20180705100003.GL2458@hirez.programming.kicks-ass.net>
Date: Thu, 5 Jul 2018 12:00:03 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: Alexander Popov <alex.popov@...ux.com>,
kernel-hardening@...ts.openwall.com,
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linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 (resend) 2/6] x86/entry: Add STACKLEAK erasing the
kernel stack at the end of syscalls
On Thu, Jul 05, 2018 at 10:12:37AM +0200, Ingo Molnar wrote:
> * Alexander Popov <alex.popov@...ux.com> wrote:
> > +static inline void stackleak_task_init(struct task_struct *task)
> > +{
> > +#ifdef CONFIG_GCC_PLUGIN_STACKLEAK
> > + task->lowest_stack = (unsigned long)end_of_stack(task) +
> > + sizeof(unsigned long);
> > +#endif
>
> Please don't break the line in such an ugly fashion - just keep the line long and
> ignore checkpatch, because the cure is worse than the disease.
FWIW I don't totally hate on:
task->lowest_stack =
(unsigned long)end_of_stack(task) + sizeof(unsigned long);
which is a much more readable split.
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