linux-kernel - Re: [PATCH -v8 -rc3] Security: Introduce security= boot parameter

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <1865922a0803060632kb63405fj3d255472fb2e555f@mail.gmail.com>
Date:	Thu, 6 Mar 2008 16:32:51 +0200
From:	"Ahmed S. Darwish" <darwish.07@...il.com>
To:	"James Morris" <jmorris@...ei.org>
Cc:	"Chris Wright" <chrisw@...s-sol.org>,
	"Stephen Smalley" <sds@...ho.nsa.gov>,
	"Eric Paris" <eparis@...isplace.org>,
	"Casey Schaufler" <casey@...aufler-ca.com>,
	"Paul Moore" <paul.moore@...com>,
	"Alexey Dobriyan" <adobriyan@...ru>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	Linus <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	LSM-ML <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH -v8 -rc3] Security: Introduce security= boot parameter

Hi James,

On Thu, Mar 6, 2008, James Morris <jmorris@...ei.org> wrote:
> On Thu, 6 Mar 2008, Ahmed S. Darwish wrote:
>
>  >     Handle Andrew's concerns:
>  >     - Use __init and __initdata in appropriate places.
>  >     - Do not rely upon dummy_ops layout, use C99 initializations.
>  >     - Use DEFINE_SPINLOCK instead of dynamic initialization.
>
>  The spinlock is not needed now, if security_module_enable() can only be
>  called during boot via an initcall.
>

Will do.

Would you mind answering my confusions below so I can do the change
with good understanding ?

I see preempt_disable() before calling security and vfs_caches init,
but what will prevent two processors/cores from executing
security_module_enable() concurrently (thus possibly corrupting
chosen_lsm) ?
security_module_enable() is also now used in __init init_smk_fs().

Or the init path got executed serially ?

Thank you,

-- 
Ahmed S. Darwish
Homepage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com
--
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/