From: Andrea Arcangeli <aarcange@redhat.com>
To: Chris Wright <chrisw@sous-sol.org>
Cc: CAI Qian <caiqian@redhat.com>,
Andrea Righi <andrea@betterlinux.com>,
Hugh Dickins <hughd@google.com>, Rik van Riel <riel@redhat.com>,
Mel Gorman <mel@csn.ul.ie>, Izik Eidus <ieidus@redhat.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [BUG 3.0.0-rc1] ksm: NULL pointer dereference in ksm_do_scan()
Date: Thu, 2 Jun 2011 16:36:22 +0200 [thread overview]
Message-ID: <20110602143622.GE19505@random.random> (raw)
In-Reply-To: <20110602143143.GI23047@sequoia.sous-sol.org>
On Thu, Jun 02, 2011 at 07:31:43AM -0700, Chris Wright wrote:
> * CAI Qian (caiqian@redhat.com) wrote:
> > madvise(0x2210000, 4096, 0xc /* MADV_??? */) = 0
> > --- SIGSEGV (Segmentation fault) @ 0 (0) ---
>
> Right, that's just what the program is trying to do, segfault.
>
> > +++ killed by SIGSEGV (core dumped) +++
> > Segmentation fault (core dumped)
> >
> > Did I miss anything?
>
> I found it works but not 100% of the time.
>
> So I just run the bug in a loop.
echo 0 >scan_millisecs helps.
next prev parent reply other threads:[~2011-06-02 14:52 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-01 22:20 [BUG 3.0.0-rc1] ksm: NULL pointer dereference in ksm_do_scan() Andrea Righi
2011-06-02 1:53 ` Chris Wright
2011-06-02 7:09 ` CAI Qian
2011-06-02 14:19 ` Andrea Righi
2011-06-02 16:48 ` Chris Wright
2011-06-02 17:29 ` Hugh Dickins
2011-06-02 17:43 ` Andrea Arcangeli
2011-06-03 17:06 ` Hugh Dickins
2011-06-03 18:13 ` Andrea Arcangeli
2011-06-02 17:35 ` [PATCH] ksm: fix race between ksmd and exiting task Chris Wright
2011-06-02 20:12 ` Andrea Righi
2011-06-02 21:23 ` Chris Wright
2011-06-03 16:37 ` Hugh Dickins
2011-06-04 0:54 ` [PATCH] ksm: fix NULL pointer dereference in scan_get_next_rmap_item Chris Wright
2011-06-02 20:10 ` [BUG 3.0.0-rc1] ksm: NULL pointer dereference in ksm_do_scan() Andrea Righi
2011-06-03 4:42 ` CAI Qian
2011-06-02 14:31 ` Chris Wright
2011-06-02 14:36 ` Andrea Arcangeli [this message]
2011-06-02 15:36 ` Chris Wright
2011-06-02 16:44 ` Andrea Arcangeli
2011-06-02 20:15 ` Andrea Righi
2011-06-02 21:35 ` Andrea Arcangeli
2011-06-03 4:50 ` CAI Qian
2011-06-03 4:44 ` CAI Qian
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