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From: Vlastimil Babka <vbabka@suse.cz>
To: Petr Mladek <pmladek@suse.com>, Steven Rostedt <rostedt@goodmis.org>
Cc: Timur Tabi <timur@kernel.org>,
	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	Matthew Wilcox <willy@infradead.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
	roman.fietze@magna.com, keescook@chromium.org,
	John Ogness <john.ogness@linutronix.de>,
	linux-mm@kvack.org, Akinobu Mita <akinobu.mita@gmail.com>
Subject: Re: [PATCH 0/2] introduce DUMP_PREFIX_UNHASHED for hex dumps
Date: Wed, 27 Jan 2021 11:38:17 +0100	[thread overview]
Message-ID: <d021c867-3f24-9933-65d4-124e1b2dac33@suse.cz> (raw)
In-Reply-To: <YBE8Pj8t8bsVroyQ@alley>

On 1/27/21 11:11 AM, Petr Mladek wrote:
> On Tue 2021-01-26 12:40:32, Steven Rostedt wrote:
>> On Tue, 26 Jan 2021 12:39:12 -0500
>> Steven Rostedt <rostedt@goodmis.org> wrote:
>> 
>> > On Tue, 26 Jan 2021 11:30:02 -0600
>> > Timur Tabi <timur@kernel.org> wrote:
>> > 
>> > > On 1/26/21 11:14 AM, Vlastimil Babka wrote:  
>> > > > If it was a boot option, I would personally be for leaving hashing enabled by
>> > > > default, with opt-in boot option to disable it.    
>> > > 
>> > > A boot option would solve all my problems.  I wouldn't need to recompile 
>> > > the kernel, and it would apply to all variations of printk.  
>> > 
>> > Should it be called "make-printk-insecure"
> 
> Nit: This makes me feel that printk() might break (block) the system.
>      Please, make it more clear that it is about unveiling some secret
>      information, something like:
> 
> 	"non-secret-printk"
> 	"non-confidental-printk"
> 	"unretricted-printk"
> 
> I do not mind about the words order or using the
> "make-printk-non-secret" form.

Yeah, let's not be overly dramatic here.

>> And even if we make this a boot time option, perhaps we should still
>> include that nasty dmesg notice, which will let people know that the kernel
>> has unhashed values.
> 
> +1

If it's what it takes to have that option, fine :)

> Best Regards,
> Petr
> 


  reply	other threads:[~2021-01-27 10:42 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-16 22:09 [PATCH 0/2] introduce DUMP_PREFIX_UNHASHED for hex dumps Timur Tabi
2021-01-16 22:09 ` [PATCH 1/2] [v2] lib/hexdump: introduce DUMP_PREFIX_UNHASHED for unhashed addresses Timur Tabi
2021-01-18 10:03   ` Andy Shevchenko
2021-01-18 15:57     ` Timur Tabi
2021-01-18 17:14       ` Andy Shevchenko
2021-01-18 17:53         ` Timur Tabi
2021-01-16 22:09 ` [PATCH 2/2] mm/page_poison: use unhashed address in hexdump for check_poison_mem() Timur Tabi
2021-01-18 18:26 ` [PATCH 0/2] introduce DUMP_PREFIX_UNHASHED for hex dumps Matthew Wilcox
2021-01-18 19:03   ` Timur Tabi
2021-01-19  0:53     ` Sergey Senozhatsky
2021-01-19  1:47       ` Matthew Wilcox
2021-01-19 10:38         ` Sergey Senozhatsky
2021-01-19 19:45           ` Kees Cook
2021-01-26 16:47           ` Vlastimil Babka
2021-01-26 16:59             ` Timur Tabi
2021-01-26 17:14               ` Steven Rostedt
2021-01-26 17:14               ` Vlastimil Babka
2021-01-26 17:30                 ` Timur Tabi
2021-01-26 17:39                   ` Steven Rostedt
2021-01-26 17:40                     ` Steven Rostedt
2021-01-26 19:23                       ` John Ogness
2021-01-27  2:11                         ` Sergey Senozhatsky
2021-01-27  3:22                           ` Timur Tabi
2021-01-27 10:11                       ` Petr Mladek
2021-01-27 10:38                         ` Vlastimil Babka [this message]
2021-01-19 19:45         ` Kees Cook
2021-01-19 19:55           ` Timur Tabi
2021-01-19 20:10             ` Steven Rostedt
2021-01-19 20:49               ` Timur Tabi
2021-01-19 21:15                 ` Steven Rostedt
2021-01-19 21:25                   ` Timur Tabi
2021-01-20  9:19             ` Petr Mladek
2021-01-20 12:17               ` Matthew Wilcox
2021-01-20 19:39               ` Linus Torvalds
2021-01-19 20:18           ` Randy Dunlap
2021-01-20 20:28             ` Kees Cook
2021-01-19  2:30       ` Timur Tabi

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