From: Kefeng Wang <wangkefeng.wang@huawei.com>
To: SeongJae Park <sj@kernel.org>, Andrew Morton <akpm@linux-foundation.org>
Cc: <damon@lists.linux.dev>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>, <stable@vger.kernel.org>
Subject: Re: [PATCH 1/2] mm/damon/paddr: fix folio_size() call after folio_put() in damon_pa_young()
Date: Mon, 6 Mar 2023 10:09:16 +0800 [thread overview]
Message-ID: <90d30f18-68e7-d295-7a42-c33554fd8b17@huawei.com> (raw)
In-Reply-To: <20230304193949.296391-2-sj@kernel.org>
On 2023/3/5 3:39, SeongJae Park wrote:
> damon_pa_young() is accessing a folio via folio_size() after folio_put()
> for the folio has invoked. Fix it.
>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
> Fixes: 397b0c3a584b ("mm/damon/paddr: remove folio_sz field from damon_pa_access_chk_result")
> Cc: <stable@vger.kernel.org> # 6.3.x
> Signed-off-by: SeongJae Park <sj@kernel.org>
> ---
> mm/damon/paddr.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
> index 3fda00a0f786..10f159b315ea 100644
> --- a/mm/damon/paddr.c
> +++ b/mm/damon/paddr.c
> @@ -130,7 +130,6 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz)
> accessed = false;
> else
> accessed = true;
> - folio_put(folio);
> goto out;
> }
>
> @@ -144,10 +143,10 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz)
>
> if (need_lock)
> folio_unlock(folio);
> - folio_put(folio);
>
> out:
> *folio_sz = folio_size(folio);
> + folio_put(folio);
> return accessed;
> }
>
next prev parent reply other threads:[~2023-03-06 2:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-04 19:39 [PATCH 0/2] mm/damon/paddr: Fix folio-use-after-put bugs SeongJae Park
2023-03-04 19:39 ` [PATCH 1/2] mm/damon/paddr: fix folio_size() call after folio_put() in damon_pa_young() SeongJae Park
2023-03-05 0:00 ` Matthew Wilcox
2023-03-06 2:09 ` Kefeng Wang [this message]
2023-03-04 19:39 ` [PATCH 2/2] mm/damon/paddr: fix folio_nr_pages() after folio_put() in damon_pa_mark_accessed_or_deactivate() SeongJae Park
2023-03-05 0:00 ` Matthew Wilcox
2023-03-06 2:05 ` Kefeng Wang
2023-03-06 2:04 ` [PATCH 0/2] mm/damon/paddr: Fix folio-use-after-put bugs Kefeng Wang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=90d30f18-68e7-d295-7a42-c33554fd8b17@huawei.com \
--to=wangkefeng.wang@huawei.com \
--cc=akpm@linux-foundation.org \
--cc=damon@lists.linux.dev \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=sj@kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.