From: Mike Snitzer <snitzer@redhat.com>
To: Kent Overstreet <koverstreet@google.com>
Cc: linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org,
dm-devel@redhat.com, axboe@kernel.dk
Subject: Re: NULL pointer due to malformed bcache bio
Date: Tue, 23 Apr 2013 12:35:51 -0400 [thread overview]
Message-ID: <20130423163551.GA9958@redhat.com> (raw)
In-Reply-To: <20130422212218.GA4704@localhost>
On Mon, Apr 22 2013 at 5:22pm -0400,
Kent Overstreet <koverstreet@google.com> wrote:
> On Wed, Apr 10, 2013 at 04:54:40PM -0400, Mike Snitzer wrote:
> > Hey,
> >
> > So DM core clearly needs to be more defensive about the possibility for
> > a NULL return from bio_alloc_bioset() given I'm hitting a NULL pointer
> > in DM's alloc_tio() because nr_iovecs=512. bio_alloc_bioset()'s call to
> > bvec_alloc() only supports nr_iovecs up to BIO_MAX_PAGES (256).
>
> I have a fix for this queued up in my bcache-for-upstream, if you want
> to check and make sure it works.
Works for me, thanks.
prev parent reply other threads:[~2013-04-23 16:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-10 20:54 NULL pointer due to malformed bcache bio Mike Snitzer
2013-04-10 20:54 ` Mike Snitzer
2013-04-10 22:49 ` Kent Overstreet
[not found] ` <20130410224914.GD30871-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2013-04-11 0:03 ` Mike Snitzer
2013-04-11 0:03 ` Mike Snitzer
[not found] ` <20130411000342.GA19451-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-04-12 18:53 ` Kent Overstreet
2013-04-12 18:53 ` Kent Overstreet
2013-04-22 21:22 ` Kent Overstreet
2013-04-23 16:35 ` Mike Snitzer [this message]
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