From: Joe Perches <joe@perches.com>
To: Petr Mladek <pmladek@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
"Tobin C . Harding" <me@tobin.cc>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.cz>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 6/9] vsprintf: Factor out %pV handler as va_format()
Date: Fri, 06 Apr 2018 07:19:15 -0700 [thread overview]
Message-ID: <1523024355.6127.3.camel@perches.com> (raw)
In-Reply-To: <20180406131242.mnxutlobi7r6qi6u@pathway.suse.cz>
On Fri, 2018-04-06 at 15:12 +0200, Petr Mladek wrote:
> On Wed 2018-04-04 07:26:07, Joe Perches wrote:
> > On Wed, 2018-04-04 at 10:58 +0200, Petr Mladek wrote:
> > > Move the code from the long pointer() function. We are going to add a check
> > > for the access to the address that will make it even more complicated.
> > >
> > > This patch does not change the existing behavior.
> >
> > But it might increase stack consumption.
> >
> > As the %pV is recursive, this is may not be a good thing.
>
> It seems to be safe to pass just a pointer to struct printf_spec.
> In fact, it would make sense to use this also in string() and
> __string() calls. Copying 64 bytes many times look useless.
huh?
struct printf_spec is 64 bits, the same size as a
pointer on 64 bit systems.
I'm dubious about this entire patch series.
next prev parent reply other threads:[~2018-04-06 14:19 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-04 8:58 [PATCH v4 0/9] vsprintf: Prevent silent crashes and consolidate error handling Petr Mladek
2018-04-04 8:58 ` [PATCH v4 1/9] vsprintf: Shuffle ptr_to_id() code Petr Mladek
2018-04-04 8:58 ` [PATCH v4 2/9] vsprintf: Consistent %pK handling for kptr_restrict == 0 Petr Mladek
2018-04-04 23:10 ` Sergey Senozhatsky
2018-04-05 14:34 ` Petr Mladek
2018-04-05 13:04 ` Andy Shevchenko
2018-04-05 14:46 ` Petr Mladek
2018-04-07 14:08 ` Andy Shevchenko
2018-04-09 12:05 ` Petr Mladek
2018-04-09 12:11 ` Andy Shevchenko
2018-04-04 8:58 ` [PATCH v4 3/9] vsprintf: Do not check address of well-known strings Petr Mladek
2018-04-05 13:30 ` Rasmus Villemoes
2018-04-06 9:15 ` Petr Mladek
2018-04-07 14:12 ` Andy Shevchenko
2018-04-09 12:19 ` Petr Mladek
2018-04-10 10:05 ` Andy Shevchenko
2018-04-04 8:58 ` [PATCH v4 4/9] vsprintf: Consolidate handling of unknown pointer specifiers Petr Mladek
2018-04-05 14:25 ` Rasmus Villemoes
2018-04-05 23:45 ` Joe Perches
2018-04-05 23:55 ` Joe Perches
2018-04-06 11:43 ` Petr Mladek
2018-04-06 13:17 ` Rasmus Villemoes
2018-04-06 14:27 ` Joe Perches
2018-04-09 12:30 ` Petr Mladek
2018-04-07 14:23 ` Andy Shevchenko
2018-04-06 23:52 ` Sergey Senozhatsky
2018-04-06 23:59 ` Joe Perches
2018-04-07 0:33 ` Sergey Senozhatsky
2018-04-07 1:00 ` Joe Perches
2018-04-07 1:17 ` Sergey Senozhatsky
2018-04-06 11:25 ` Petr Mladek
2018-04-07 14:26 ` Andy Shevchenko
2018-04-09 13:50 ` Petr Mladek
2018-04-10 11:41 ` Andy Shevchenko
2018-04-11 9:52 ` Petr Mladek
2018-04-24 16:47 ` Andy Shevchenko
2018-04-04 8:58 ` [PATCH v4 5/9] vsprintf: Factor out %p[iI] handler as ip_addr_string() Petr Mladek
2018-04-04 23:58 ` Sergey Senozhatsky
2018-04-05 14:14 ` Petr Mladek
2018-04-07 14:30 ` Andy Shevchenko
2018-04-04 8:58 ` [PATCH v4 6/9] vsprintf: Factor out %pV handler as va_format() Petr Mladek
2018-04-04 14:26 ` Joe Perches
2018-04-06 13:12 ` Petr Mladek
2018-04-06 14:19 ` Joe Perches [this message]
2018-04-09 11:44 ` Petr Mladek
2018-04-09 11:59 ` Joe Perches
2018-04-04 8:58 ` [PATCH v4 7/9] vsprintf: Factor out %pO handler as kobject_string() Petr Mladek
2018-04-04 23:35 ` Sergey Senozhatsky
2018-04-04 23:43 ` Sergey Senozhatsky
2018-04-05 14:02 ` Petr Mladek
2018-04-04 8:58 ` [PATCH v4 8/9] vsprintf: Prevent crash when dereferencing invalid pointers Petr Mladek
2018-04-05 14:46 ` Rasmus Villemoes
2018-04-06 12:26 ` Petr Mladek
2018-04-06 13:12 ` Rasmus Villemoes
2018-04-10 13:26 ` Petr Mladek
2018-04-06 9:37 ` Rasmus Villemoes
2018-04-04 8:58 ` [PATCH v4 9/9] vsprintf: Avoid confusion between invalid address and value Petr Mladek
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