linux-kernel - Re: [PATCH, RFC] Char dev BKL pushdown v2

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Tue, 20 May 2008 09:26:51 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Roland Dreier <rdreier@...co.com>
Cc:	corbet@....net (Jonathan Corbet),
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alexander Viro <viro@....linux.org.uk>,
	linux-kernel@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH, RFC] Char dev BKL pushdown v2

> Thanks.  Just to be super-explicit, ioctl() cannot be called on a given
> file until the open() for that particular file has returned, right?

Right. Or two ioctls against each other unless one sleepers, or against
random other parts of the kernel which still use the BKL - eg fasync,
bits of procfs ...

> And the point about driver initialization is that open() can be called
> as soon as the file operations are registered, even if the module_init
> function has not returned?

Exactly.

Alan
--
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/