linux-kernel - Re: [PATCH 0/7] tcp: bugs and cleanup for 2.6.33

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: <1267130591.2107.16.camel@achroite.uk.solarflarecom.com>
Date:	Thu, 25 Feb 2010 20:43:11 +0000
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	William Allen Simpson <william.allen.simpson@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Developers <linux-kernel@...r.kernel.org>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 0/7] tcp: bugs and cleanup for 2.6.33

On Thu, 2010-02-25 at 15:34 -0500, William Allen Simpson wrote:
> Redefine two TCP header functions to accept TCP header pointer.
> When subtracting, return signed int to allow error checking.

This patch only adds functions, so why do you say 'redefine'?

> These functions will be used in subsequent patches that implement
> additional features.
[...]
> +/* Length of standard options only.  This could be negative. */
> +static inline int tcp_option_len_th(const struct tcphdr *th)
> +{
> +       return (int)(th->doff * 4) - sizeof(*th);
> +}

I don't see  the point of this cast; the left operand of the subtraction
will in any case be promoted to size_t to match the right operand.

Did you mean
	return (int)(th->doff * 4 - sizeof(*th));
?

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

--
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/