linux-kernel - Re: [PATCH v5 09/11] vsprintf: Prevent crash when dereferencing invalid pointers

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Message-ID: <1524670366.21176.569.camel@linux.intel.com>
Date:   Wed, 25 Apr 2018 18:32:46 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Petr Mladek <pmladek@...e.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        "Tobin C . Harding" <me@...in.cc>, Joe Perches <joe@...ches.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.cz>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 09/11] vsprintf: Prevent crash when dereferencing
 invalid pointers

On Wed, 2018-04-25 at 18:10 +0300, Andy Shevchenko wrote:

Some typos fixed

> I would preserve similar style of buf pointer handling, i.e.
> 
> static char *valid_pointer_access(char **buf, char *end,

char *buf

> 				  const void *ptr, struct printf_spec
> spec)
> {
> 	const char *err_msg;
> 
> 	err_msg = check_pointer_access(ptr);
> 	if (err_msg)
> 		return = valid_string(*buf, end, err_msg, spec);

		return valid_string(buf, end, err_msg, spec);

> 	return NULL;
> }
> 

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy