From: Jens Axboe <axboe@suse.de>
To: Peter Palfrader <peter@palfrader.org>, linux-kernel@vger.kernel.org
Cc: agk@redhat.com
Subject: Re: 2.6.16: Oops - null ptr in blk_recount_segments?
Date: Wed, 29 Mar 2006 10:23:44 +0200 [thread overview]
Message-ID: <20060329082343.GV8186@suse.de> (raw)
In-Reply-To: <20060329005917.GR25288@asteria.noreply.org>
On Wed, Mar 29 2006, Peter Palfrader wrote:
> On Wed, 29 Mar 2006, Nathan Scott wrote:
>
> > You'll be better off trying the bio_clone fix discussed in the
> > other (ext3-bio_clone-panic) thread than go down this route
> > (there is a fix in 2.6.16.1 apparently - start there). Certainly
> > try that before attempting to revert these changes anyway.
>
> The problem persists on 2.6.16.1.
The original oops showed the path into bio_clone() originating from
crypt_alloc_buffer() in dm-crypt.c - and blk_recount_segments() is
oopsinig in page_to_pfn(), meaning that the most likely cause of this is
dm-crypt passing in a bio with invalid ->bi_idx and/or ->bi_vcnt. At
least they are not matching what ->bi_io_vec[] holds.
--
Jens Axboe
next prev parent reply other threads:[~2006-03-29 8:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-27 2:28 Peter Palfrader
2006-03-27 4:36 ` David Chinner
2006-03-27 4:58 ` Peter Palfrader
2006-03-27 6:10 ` David Chinner
2006-03-28 14:22 ` Jan Engelhardt
2006-03-28 21:38 ` Peter Palfrader
2006-03-28 21:42 ` Nathan Scott
2006-03-29 0:59 ` Peter Palfrader
2006-03-29 8:23 ` Jens Axboe [this message]
2006-03-29 4:40 ` Peter Palfrader
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