linux-kernel - Re: [PATCH] mm: fix lazy vmap purging (use-after-free error)

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: <19f34abd0902230024g63aadad2jef16c97a9d792291@mail.gmail.com>
Date:	Mon, 23 Feb 2009 09:24:39 +0100
From:	Vegard Nossum <vegard.nossum@...il.com>
To:	paulmck@...ux.vnet.ibm.com
Cc:	Ingo Molnar <mingo@...e.hu>, stable@...nel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: fix lazy vmap purging (use-after-free error)

2009/2/23 Paul E. McKenney <paulmck@...ux.vnet.ibm.com>:
> Hello, Vegard,
>
> Could you please try out the following patch?  I am not 100% confident
> of it on non-x86 architectures, nor during the time that non-boot CPUs
> start up (though this patch should not break non-boot CPUs any more than
> they might already be broken).

Hi!

This patch fixes it for me. Now I see the huge stream of call_rcu()s,
followed by a huge stream of kfrees() (after the list traversal has
completed).


Vegard

-- 
"The animistic metaphor of the bug that maliciously sneaked in while
the programmer was not looking is intellectually dishonest as it
disguises that the error is the programmer's own creation."
	-- E. W. Dijkstra, EWD1036
--
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/