linux-kernel - Re: [PATCH 1/2] ecryptfs: Improve metatdata read failure logging

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]

Date:	Wed, 11 Jan 2012 12:36:51 -0800
From:	Kees Cook <keescook@...omium.org>
To:	Tim Gardner <tim.gardner@...onical.com>
Cc:	linux-fsdevel@...r.kernel.org, tyler.hicks@...onical.com,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 1/2] ecryptfs: Improve metatdata read failure logging

On Wed, Jan 11, 2012 at 06:00:41PM +0100, Tim Gardner wrote:
> There are 3 read failure cases in ecryptfs_read_metadata(), but only 2
> of them are uniquely noted by kernel log messages. This patch
> identifies and logs each read failure case. It also correctly interprets
> a negative return value from ecryptfs_read_lower().
> 
> Removes unnecessary variable initialization.
> 
> Cc: linux-kernel@...r.kernel.org
> Cc: stable@...r.kernel.org
> Cc: Tyler Hicks <tyler.hicks@...onical.com>
> Signed-off-by: Tim Gardner <tim.gardner@...onical.com>

I always like more verbose error reporting. :)

Reviewed-by: Kees Cook <keescook@...omium.org>

> +		printk(KERN_ERR "%s: Could not read %u bytes\n",
> +			__func__, crypt_stat->extent_size);

I wonder if eCryptfs in general might want to consider using the "pr_fmt"
and "pr_*" macros to do printk handling:

#define pr_fmt(fmt) __func__ ": " fmt

...

	pr_err("Could not read %u bytes\n", crypt_stat->extent_size);


-Kees

-- 
Kees Cook
--
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/