From: Arjan van de Ven <arjan@infradead.org>
To: chinmaya@innomedia.soft.net
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Enabling message queue in 2.6.10 kernel
Date: Fri, 07 Jul 2006 12:08:58 +0200 [thread overview]
Message-ID: <1152266938.3111.45.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <44AE3188.6000304@innomedia.soft.net>
>
> But the out put messages in # dmesg <enter> is like this
>
> Start send message
> Send ret = -14
> Err: sys_msgsnd
> Start recv message
> Recv ret = -42
> Err: sys_msgrcv
> Stop Kernel Thread
>
> Is there any thing I am missing. Please help soon.
you're missing that you're calling functions which expect a userspace
pointer, but with a kernel space pointer. You really shouldn't do that,
and in fact it doesn't work the way you did it. (you'd need to call
set_fs() and friends first, but if you're not really careful you open
security holes that way)
Can you explain why you'd want to do this from kernel space in the first
place? It's not unlikely that it's the wrong approach....
Greetings,
Arjan van de Ven
prev parent reply other threads:[~2006-07-07 10:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-07 10:03 Chinmaya Mishra
2006-07-07 10:08 ` Arjan van de Ven [this message]
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