From: Andrew Morton <akpm@linux-foundation.org>
To: mm-commits@vger.kernel.org, willy@infradead.org,
wangkefeng.wang@huawei.com, vishal.moola@gmail.com,
stable@vger.kernel.org, sj@kernel.org, akpm@linux-foundation.org
Subject: [merged mm-hotfixes-stable] mm-damon-paddr-fix-folio_size-call-after-folio_put-in-damon_pa_young.patch removed from -mm tree
Date: Tue, 07 Mar 2023 17:05:36 -0800 [thread overview]
Message-ID: <20230308010537.68A0CC433EF@smtp.kernel.org> (raw)
The quilt patch titled
Subject: mm/damon/paddr: fix folio_size() call after folio_put() in damon_pa_young()
has been removed from the -mm tree. Its filename was
mm-damon-paddr-fix-folio_size-call-after-folio_put-in-damon_pa_young.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon/paddr: fix folio_size() call after folio_put() in damon_pa_young()
Date: Sat, 4 Mar 2023 19:39:48 +0000
Patch series "mm/damon/paddr: Fix folio-use-after-put bugs".
There are two folio accesses after folio_put() in mm/damon/paddr.c file.
Fix those.
This patch (of 2):
damon_pa_young() is accessing a folio via folio_size() after folio_put()
for the folio has invoked. Fix it.
Link: https://lkml.kernel.org/r/20230304193949.296391-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20230304193949.296391-2-sj@kernel.org
Fixes: 397b0c3a584b ("mm/damon/paddr: remove folio_sz field from damon_pa_access_chk_result")
Signed-off-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: <stable@vger.kernel.org> [6.2.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
--- a/mm/damon/paddr.c~mm-damon-paddr-fix-folio_size-call-after-folio_put-in-damon_pa_young
+++ a/mm/damon/paddr.c
@@ -130,7 +130,6 @@ static bool damon_pa_young(unsigned long
accessed = false;
else
accessed = true;
- folio_put(folio);
goto out;
}
@@ -144,10 +143,10 @@ static bool damon_pa_young(unsigned long
if (need_lock)
folio_unlock(folio);
- folio_put(folio);
out:
*folio_sz = folio_size(folio);
+ folio_put(folio);
return accessed;
}
_
Patches currently in -mm which might be from sj@kernel.org are
reply other threads:[~2023-03-08 1:05 UTC|newest]
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