netdev - Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413

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:	Tue, 22 Nov 2011 08:50:03 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Christian Kujau <lists@...dbynature.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"Alex,Shi" <alex.shi@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>
Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413

On Tue, 22 Nov 2011, Markus Trippelsdorf wrote:

> > Given slub is now lockless, validate_slab_slab() is probably very wrong
> > these days.
>
> OK "slabinfo -v" is useless then. But that doesn't invalidate the BUGs
> that I saw during boot. They happend before I could even run slabinfo
> for the first time.

Correct. Also the use of debugging disables the use of cmpxchg_double()
but not this_cpu_cmpxchg() use. See cmpxchg_double_slab() and
kmem_cache_open()s determination of the __CMPXCHG_DOUBLE flag.

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