From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9FBD22906 for ; Sat, 4 Mar 2023 19:40:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2D13C4339C; Sat, 4 Mar 2023 19:40:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1677958802; bh=uVtft0lxTja3jBPQPJpnoQbKRCxZP/ST9hjfus9mMms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e3nKr5Xsgp0MN2UPq7FxyhDz5NDDfGt1VW+xC+uwXKXl/fw5Ie91/IKKZwhFgi+yh 9CFrNXy26L4W8ttmk7TxHUh28ikksODKGfRMLce15uwQC3XqMYNKtV7Vj7ORG+oyDP mlPZ/o1VpAT8fNgpNrqGke2yktJx4RWUtx1oHDmE6d0G9zaqXuHyE7Tlxmgl0RG6sB e4OzERuIHep+cFfGL6RNdEEtI2fzu0E7JvEyAElXtJXvcoO/LwD4tObncoLD/62A/t CcLHJgqyFqenktJMegZbT/nUoR0mfKR9Bav6rvN2UVlatGynzpKP55fHXEDqUGwAEf AZ9ZkvF6WyUMQ== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Kefeng Wang , "Vishal Moola (Oracle)" , "Matthew Wilcox (Oracle)" , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH 2/2] mm/damon/paddr: fix folio_nr_pages() after folio_put() in damon_pa_mark_accessed_or_deactivate() Date: Sat, 4 Mar 2023 19:39:49 +0000 Message-Id: <20230304193949.296391-3-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230304193949.296391-1-sj@kernel.org> References: <20230304193949.296391-1-sj@kernel.org> Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit damon_pa_mark_accessed_or_deactivate() is accessing a folio via folio_nr_pages() after folio_put() for the folio has invoked. Fix it. Fixes: f70da5ee8fe1 ("mm/damon: convert damon_pa_mark_accessed_or_deactivate() to use folios") Cc: # 6.3.x Signed-off-by: SeongJae Park --- mm/damon/paddr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index 10f159b315ea..0db724aec5cb 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -277,8 +277,8 @@ static inline unsigned long damon_pa_mark_accessed_or_deactivate( folio_mark_accessed(folio); else folio_deactivate(folio); - folio_put(folio); applied += folio_nr_pages(folio); + folio_put(folio); } return applied * PAGE_SIZE; } -- 2.25.1