linux-kernel - Re: [PATCH 1/4] stringbuf: A string buffer implementation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20071027073140.GB6043@ucw.cz>
Date:	Sat, 27 Oct 2007 07:31:40 +0000
From:	Pavel Machek <pavel@....cz>
To:	Matthew Wilcox <matthew@....cx>
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org,
	Matthew Wilcox <willy@...ux.intel.com>
Subject: Re: [PATCH 1/4] stringbuf: A string buffer implementation

On Tue 2007-10-23 17:12:43, Matthew Wilcox wrote:
> Consecutive calls to printk are non-atomic, which leads to various
> implementations for accumulating strings which can be printed in one call.
> This is a generic string buffer which can also be used for non-printk
> purposes.  There is no sb_scanf implementation yet as I haven't identified
> a user for it.

GFP_ATOMIC alloca5tion there is bad news. It can randomly fail.....
without good method of handling that in caller.
							Pavel
> +/*
> + * Convert the stringbuf to a string.  It is the caller's responsibility
> + * to free the string.  The stringbuf is then ready to be reused.
> + */
> +static inline char *sb_to_string(struct stringbuf *sb)
> +{
> +	char *s = sb->s;
> +	if (sb_error(sb))
> +		s = kstrdup(s, GFP_ATOMIC);
> +	sb_init(sb);
> +	return s;
> +}

							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/