From: Kent Overstreet <koverstreet@google.com>
To: Mike Snitzer <snitzer@redhat.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: Mon, 22 Apr 2013 14:22:18 -0700 [thread overview]
Message-ID: <20130422212218.GA4704@localhost> (raw)
In-Reply-To: <20130410205439.GA18092@redhat.com>
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.
next prev parent reply other threads:[~2013-04-22 21:22 UTC|newest]
Thread overview: 6+ 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 22:49 ` Kent Overstreet
2013-04-11 0:03 ` Mike Snitzer
2013-04-12 18:53 ` Kent Overstreet
2013-04-22 21:22 ` Kent Overstreet [this message]
2013-04-23 16:35 ` Mike Snitzer
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