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From: Eric Biggers <ebiggers@kernel.org>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	stable@vger.kernel.org, Alexei Starovoitov <ast@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jeff Vander Stoep <jeffv@google.com>,
	Jessica Yu <jeyu@kernel.org>
Subject: Re: [PATCH] kmod: make request_module() return an error when autoloading is disabled
Date: Wed, 11 Mar 2020 11:08:05 -0700	[thread overview]
Message-ID: <20200311180805.GA1273@sol.localdomain> (raw)
In-Reply-To: <20200311180107.GO11244@42.do-not-panic.com>

On Wed, Mar 11, 2020 at 06:01:07PM +0000, Luis Chamberlain wrote:
> On Wed, Mar 11, 2020 at 10:41:34AM -0700, Eric Biggers wrote:
> > On Wed, Mar 11, 2020 at 10:28:07AM -0700, Kees Cook wrote:
> > > On Tue, Mar 10, 2020 at 03:37:31PM -0700, Eric Biggers wrote:
> > > > From: Eric Biggers <ebiggers@google.com>
> > > > 
> > > > It's long been possible to disable kernel module autoloading completely
> > > > by setting /proc/sys/kernel/modprobe to the empty string.  This can be
> > > 
> > > Hunh. I've never seen that before. :) I've always used;
> > > 
> > > echo 1 > /proc/sys/kernel/modules_disabled
> > > 
> > > Regardless,
> > > 
> > > Reviewed-by: Kees Cook <keescook@chromium.org>
> > > 
> > 
> > modules_disabled is different because it disables *all* module loading, not just
> > autoloading.
> 
> Clarifying this on your patch would be useful, otherwise its lost
> tribal knowledge.

I think it would be more useful to improve the documentation in proc(5) and
Documentation/admin-guide/sysctl/kernel.rst.  People shouldn't have to read
random kernel commit messages to find the documentation.

I'll send out patches for those.

- Eric

      reply	other threads:[~2020-03-11 18:08 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-10 22:37 Eric Biggers
2020-03-11  4:32 ` Luis Chamberlain
2020-03-11  5:26   ` Eric Biggers
2020-03-11  6:31     ` Luis Chamberlain
2020-03-11 17:35       ` Eric Biggers
2020-03-11 18:00         ` Luis Chamberlain
2020-03-11 18:21           ` Eric Biggers
2020-03-11 18:40             ` Luis Chamberlain
2020-03-11  5:55   ` Josh Triplett
2020-03-11  6:32     ` Luis Chamberlain
2020-03-11 17:28 ` Kees Cook
2020-03-11 17:41   ` Eric Biggers
2020-03-11 17:50     ` Kees Cook
2020-03-11 18:01     ` Luis Chamberlain
2020-03-11 18:08       ` Eric Biggers [this message]

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