Re: [PATCH] fs: System memory leak when running HTX with T10 DIF enabled

[Christoph Hellwig <hch@lst.de>]

On Wed, Jun 28, 2017 at 01:10:31PM -0400, Keith Busch wrote:
> On Wed, Jun 28, 2017 at 11:32:51AM -0500, wenxiong@linux.vnet.ibm.com wrote:
> > diff --git a/fs/block_dev.c b/fs/block_dev.c
> > index 519599d..e871444 100644
> > --- a/fs/block_dev.c
> > +++ b/fs/block_dev.c
> > @@ -264,6 +264,10 @@ static void blkdev_bio_end_io_simple(struct bio *bio)
> >  
> >  	if (unlikely(bio.bi_error))
> >  		return bio.bi_error;
> > +
> > +	if (bio_integrity(&bio))
> > +		bio_integrity_free(&bio);
> > +
> >  	return ret;
> >  }
> 
> We don't want to leak the integrity payload in case of bi_error either.

And we should just call __bio_free.  Which btw every user of bio_init
probably needs.