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

From: Arjan van de Ven
Date: Tue Aug 08 2006 - 11:08:44 EST

Alan Cox wrote:
The biggest crawly horror I've found so far in auditing the tty locking
is current->signal->tty. The tty layer currently and explicitly protects
this using tty_mutex. The core kernel likewise knows about this.

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
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