From: Joe Perches <joe@perches.com>
To: Kay Sievers <kay@vrfy.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-arm-kernel@lists.infradead.org,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
devel@driverdev.osuosl.org, alsa-devel@alsa-project.org
Subject: Re: [PATCH 0/8] Rework KERN_<LEVEL>
Date: Tue, 05 Jun 2012 17:19:31 -0700 [thread overview]
Message-ID: <1338941971.11962.20.camel@joe2Laptop> (raw)
In-Reply-To: <CAPXgP12OFnh6FZO4zFGCw=Ea4U6Ne5OoCg_9BPxRX62x0EVnng@mail.gmail.com>
On Wed, 2012-06-06 at 02:13 +0200, Kay Sievers wrote:
> The question is what happens if you inject your new binary two-byte
> prefix, like:
> echo -e "\x01\x02Hello" > /dev/kmsg
It's not a 2 byte binary.
It's a leading ascii SOH and a standard ascii char
'0' ... '7' or 'd'.
#define KERN_EMERG KERN_SOH "0" /* system is unusable */
#define KERN_ALERT KERN_SOH "1" /* action must be taken immediately */
etc...
> And if that changes the log-level to "2" instead of the default "4"?
No it doesn't.
It's not triggering that because devkmsg_writev does
prefix parsing only on the old "<n>" form.
next prev parent reply other threads:[~2012-06-06 0:19 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-05 9:46 [PATCH 0/8] Rework KERN_<LEVEL> Joe Perches
2012-06-05 9:46 ` [PATCH 4/8] btrfs: Use printk_get_level and printk_skip_level, add __printf, fix fallout Joe Perches
2012-06-05 21:28 ` [PATCH 0/8] Rework KERN_<LEVEL> Andrew Morton
2012-06-05 21:53 ` Kay Sievers
2012-06-05 22:11 ` Joe Perches
2012-06-05 22:17 ` Andrew Morton
2012-06-05 22:49 ` Joe Perches
2012-06-05 23:29 ` Andrew Morton
2012-06-05 23:35 ` Joe Perches
2012-06-05 23:39 ` Kay Sievers
2012-06-05 23:43 ` Joe Perches
2012-06-05 23:48 ` Kay Sievers
2012-06-05 23:52 ` Joe Perches
2012-06-05 23:58 ` Andrew Morton
2012-06-06 0:07 ` Joe Perches
2012-06-06 0:13 ` Kay Sievers
2012-06-06 0:19 ` Joe Perches [this message]
2012-06-06 0:28 ` Kay Sievers
2012-06-06 0:37 ` Joe Perches
2012-06-06 0:37 ` Andrew Morton
2012-06-06 0:40 ` Joe Perches
2012-06-06 0:46 ` Andrew Morton
2012-06-06 1:10 ` Kay Sievers
2012-06-06 2:06 ` Joe Perches
2012-06-06 3:04 ` [PATCH 9/8] printk: Only look for prefix levels in kernel messages Joe Perches
2012-06-05 23:48 ` [PATCH 0/8] Rework KERN_<LEVEL> Joe Perches
2012-06-05 22:55 ` Kay Sievers
2012-06-05 23:09 ` Andrew Morton
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