From: Ingo Molnar <mingo@elte.hu>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Christoph Lameter <clameter@sgi.com>,
linux-kernel@vger.kernel.org, Mel Gorman <mel@csn.ul.ie>,
Nick Piggin <npiggin@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
Yinghai.Lu@sun.com, apw@shadowen.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [patch] mm: sparsemem memory_present() memory corruption fix
Date: Wed, 16 Apr 2008 02:34:49 +0200 [thread overview]
Message-ID: <20080416003449.GA26633@elte.hu> (raw)
In-Reply-To: <20080416000356.GA24737@elte.hu>
small addendum to the changelog:
> if (!ms->section_mem_map)
> ms->section_mem_map = sparse_encode_early_nid(nid) |
+ | SECTION_MARKED_PRESENT
>
> 'ms' will be out of bounds and we'll corrupt a small amount of memory by
> encoding the node ID. Depending on what that memory is, we might crash,
> misbehave or just not notice the bug.
the corruption might happen when encoding a non-zero node ID, or due to
the SECTION_MARKED_PRESENT which is 0x1:
mmzone.h:#define SECTION_MARKED_PRESENT (1UL<<0)
Ingo
next prev parent reply other threads:[~2008-04-16 0:35 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-11 7:41 [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/slab.c:2103!" Ingo Molnar
2008-04-11 8:21 ` Pekka Enberg
2008-04-11 8:50 ` Pekka Enberg
2008-04-11 8:54 ` Ingo Molnar
2008-04-11 9:05 ` Pekka Enberg
2008-04-11 9:08 ` Pekka Enberg
2008-04-11 9:11 ` Pekka Enberg
2008-04-11 9:24 ` Ingo Molnar
2008-04-11 10:34 ` Nick Piggin
2008-04-11 19:28 ` Christoph Lameter
2008-04-12 10:38 ` Christoph Lameter
2008-04-12 17:22 ` Yinghai Lu
2008-04-15 5:43 ` Ingo Molnar
2008-04-15 9:36 ` Mel Gorman
2008-04-15 10:03 ` Ingo Molnar
2008-04-15 6:25 ` [bug] SLUB + mm/slab.c boot crash in -rc9 Ingo Molnar
2008-04-15 6:41 ` Pekka Enberg
2008-04-15 7:08 ` Ingo Molnar
2008-04-15 8:31 ` Yinghai Lu
2008-04-15 8:46 ` Ingo Molnar
2008-04-15 9:11 ` Ingo Molnar
2008-04-15 16:02 ` Linus Torvalds
2008-04-15 16:15 ` Ingo Molnar
2008-04-15 17:23 ` Linus Torvalds
2008-04-15 19:35 ` Ingo Molnar
2008-04-15 19:41 ` Ingo Molnar
2008-04-15 19:39 ` Christoph Lameter
2008-04-15 19:54 ` Ingo Molnar
2008-04-15 20:03 ` Christoph Lameter
2008-04-15 20:17 ` Ingo Molnar
2008-04-15 20:28 ` Ingo Molnar
2008-04-15 20:34 ` Ingo Molnar
2008-04-15 20:42 ` Ingo Molnar
2008-04-15 20:50 ` Christoph Lameter
2008-04-15 20:58 ` Ingo Molnar
2008-04-15 21:08 ` Christoph Lameter
2008-04-15 21:16 ` Mike Travis
2008-04-15 21:19 ` Ingo Molnar
2008-04-15 21:21 ` Christoph Lameter
2008-04-15 21:23 ` Ingo Molnar
2008-04-15 21:24 ` Christoph Lameter
2008-04-15 21:28 ` Ingo Molnar
2008-04-15 21:33 ` Christoph Lameter
2008-04-15 21:43 ` Mike Travis
2008-04-15 22:07 ` Ingo Molnar
2008-04-15 21:27 ` Mike Travis
2008-04-15 20:34 ` Pekka Enberg
2008-04-15 20:40 ` Ingo Molnar
2008-04-15 21:06 ` Linus Torvalds
2008-04-15 21:13 ` Ingo Molnar
2008-04-15 21:24 ` Ingo Molnar
2008-04-15 21:42 ` Christoph Lameter
2008-04-15 21:55 ` Ingo Molnar
2008-04-15 22:06 ` Christoph Lameter
2008-04-15 22:13 ` Ingo Molnar
2008-04-15 22:27 ` Christoph Lameter
2008-04-15 22:32 ` Ingo Molnar
2008-04-15 23:22 ` Christoph Lameter
2008-04-15 23:27 ` Ingo Molnar
2008-04-15 23:32 ` Christoph Lameter
2008-04-16 0:04 ` Christoph Lameter
2008-04-15 23:18 ` Yinghai Lu
2008-04-16 0:03 ` [patch] mm: sparsemem memory_present() memory corruption fix Ingo Molnar
2008-04-16 0:10 ` Christoph Lameter
2008-04-16 0:18 ` Ingo Molnar
2008-04-16 0:32 ` Yinghai Lu
2008-04-16 0:44 ` Ingo Molnar
2008-04-16 0:46 ` Christoph Lameter
2008-04-16 0:52 ` Ingo Molnar
2008-04-16 1:17 ` Ingo Molnar
2008-04-16 1:30 ` Yinghai Lu
2008-04-16 2:00 ` Yinghai Lu
2008-04-16 2:20 ` KAMEZAWA Hiroyuki
2008-04-16 0:56 ` Yinghai Lu
2008-04-16 1:02 ` Ingo Molnar
2008-04-16 1:17 ` Yinghai Lu
2008-04-16 0:19 ` Christoph Lameter
2008-04-16 0:33 ` Yinghai Lu
2008-04-16 0:36 ` Ingo Molnar
2008-04-16 0:34 ` Ingo Molnar [this message]
2008-04-16 0:40 ` Ingo Molnar
2008-04-16 0:45 ` Christoph Lameter
2008-04-16 0:52 ` Ingo Molnar
2008-04-16 1:14 ` Ingo Molnar
2008-04-16 2:45 ` Linus Torvalds
2008-04-16 1:48 ` KAMEZAWA Hiroyuki
2008-04-16 14:05 ` Mel Gorman
2008-04-16 15:03 ` Ingo Molnar
2008-04-15 20:54 ` [bug] SLUB + mm/slab.c boot crash in -rc9 Christoph Lameter
2008-04-15 20:58 ` Ingo Molnar
2008-04-15 21:08 ` Ingo Molnar
2008-04-15 20:23 ` Ingo Molnar
2008-04-11 19:26 ` [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/slab.c:2103!" Christoph Lameter
2008-04-11 19:25 ` Christoph Lameter
2008-04-15 5:49 ` Ingo Molnar
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