linux-kernel - Re: How to lock current->signal->tty

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Message-Id: <1155051876.5729.93.camel@localhost.localdomain>
Date:	Tue, 08 Aug 2006 16:44:36 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, davem@...hat.com, sds@...ho.nsa.gov,
	jack@...e.cz, dwmw2@...radead.org, tony.luck@...el.com,
	jdike@...aya.com, James.Bottomley@...senPartnership.com
Subject: Re: How to lock current->signal->tty

Ar Maw, 2006-08-08 am 08:10 -0700, ysgrifennodd Arjan van de Ven:
> > Unfortunately:
> > 	Dquot passes the tty to tty_write_message without locking
> > 	arch/ia64/kernel/unanligned seems to write to it without locking
> 
> these two have absolutely no business at all using anything tty.... they should
> just use printk with KERN_EMERG or whatever

Dquot does - it writes to the controlling tty of the process exceeding
quota . That is standard Unix behaviour

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