linux-ext4 - Re: [PATCH 0/5] mballoc: trivial code cleanup

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]

Date:	Mon, 7 Feb 2011 17:24:50 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Amir Goldstein <amir73il@...il.com>
Cc:	i@...y.li, Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 0/5] mballoc: trivial code cleanup

On Mon, Feb 07, 2011 at 10:59:54PM +0200, Amir Goldstein wrote:
> it says alloc_sem protects against lazy init of adjacent groups
> and says nothing about protecting block group specific data structures...
> 
> what am I missing???

You're missing ext4_mb_load_buddy(), which takes grp->alloc_sem, and
which is released by ext4_mb_unload_buddy().  No, it's not the most
obvious code in the world...

					- Ted


--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html