linux-kernel - Re: [PATCH] bio-integrity: Fix use of bs->bio_integrity

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Date:	Thu, 13 Jun 2013 11:33:15 -0700
From:	Kent Overstreet <koverstreet@...gle.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Jens Axboe <axboe@...nel.dk>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH] bio-integrity: Fix use of bs->bio_integrity_pool after
 free

On Thu, Jun 13, 2013 at 12:14:54PM -0600, Bjorn Helgaas wrote:
> On Wed, May 29, 2013 at 4:29 PM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
> > This fixes a copy and paste error introduced by 9f060e2231
> > ("block: Convert integrity to bvec_alloc_bs()").
> >
> > Found by Coverity (CID 1020654).
> >
> > Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> > ---
> >  fs/bio-integrity.c |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
> > index 8fb4291..45e944f 100644
> > --- a/fs/bio-integrity.c
> > +++ b/fs/bio-integrity.c
> > @@ -734,7 +734,7 @@ void bioset_integrity_free(struct bio_set *bs)
> >                 mempool_destroy(bs->bio_integrity_pool);
> >
> >         if (bs->bvec_integrity_pool)
> > -               mempool_destroy(bs->bio_integrity_pool);
> > +               mempool_destroy(bs->bvec_integrity_pool);
> >  }
> >  EXPORT_SYMBOL(bioset_integrity_free);
> 
> Kent, do you want to chime in on this?  Looks like an obvious error to
> me, but maybe I'm missing something and we should teach Coverity to
> shut up about it.

Sorry - no, this is definitely a bug:

Acked-by: Kent Overstreet <koverstreet@...gle.com>
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