linux-kernel - RE: [PATCH v4 01/12] nvdimm/pmem: Fix leak on dax_add

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Date: Thu, 8 Feb 2024 13:28:40 -0800
From: Dan Williams <dan.j.williams@...el.com>
To: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Dan Williams
	<dan.j.williams@...el.com>, Arnd Bergmann <arnd@...db.de>, Dave Chinner
	<david@...morbit.com>
CC: <linux-kernel@...r.kernel.org>, Mathieu Desnoyers
	<mathieu.desnoyers@...icios.com>, Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>, Vishal Verma
	<vishal.l.verma@...el.com>, Dave Jiang <dave.jiang@...el.com>, Matthew Wilcox
	<willy@...radead.org>, Russell King <linux@...linux.org.uk>,
	<linux-arch@...r.kernel.org>, <linux-cxl@...r.kernel.org>,
	<linux-fsdevel@...r.kernel.org>, <linux-mm@...ck.org>,
	<linux-xfs@...r.kernel.org>, <dm-devel@...ts.linux.dev>,
	<nvdimm@...ts.linux.dev>, <linux-s390@...r.kernel.org>, Alasdair Kergon
	<agk@...hat.com>, Mike Snitzer <snitzer@...nel.org>, Mikulas Patocka
	<mpatocka@...hat.com>
Subject: RE: [PATCH v4 01/12] nvdimm/pmem: Fix leak on dax_add_host() failure

Mathieu Desnoyers wrote:
> Fix a leak on dax_add_host() error, where "goto out_cleanup_dax" is done
> before setting pmem->dax_dev, which therefore issues the two following
> calls on NULL pointers:
> 
> out_cleanup_dax:
>         kill_dax(pmem->dax_dev);
>         put_dax(pmem->dax_dev);
> 
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>

Looks good to me.

Reviewed-by: Dan Williams <dan.j.williams@...el.com>