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Mon, 23 Feb 2026 03:31:04 +0000 Received: from DS7PR12MB9473.namprd12.prod.outlook.com ([fe80::f01d:73d2:2dda:c7b2]) by DS7PR12MB9473.namprd12.prod.outlook.com ([fe80::f01d:73d2:2dda:c7b2%4]) with mapi id 15.20.9632.017; Mon, 23 Feb 2026 03:31:04 +0000 From: Zi Yan To: linux-mm@kvack.org Cc: David Hildenbrand , Andrew Morton , linux-erofs@lists.ozlabs.org, linux-block@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Zi Yan , Christian Brauner , K Prateek Nayak , Davidlohr Bueso , Eric Sandeen Subject: [PATCH v1 05/11] watch_queue: zero page->private when freeing pages Date: Sun, 22 Feb 2026 22:26:35 -0500 Message-ID: <20260223032641.1859381-6-ziy@nvidia.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260223032641.1859381-1-ziy@nvidia.com> References: <20260223032641.1859381-1-ziy@nvidia.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: MN2PR16CA0054.namprd16.prod.outlook.com (2603:10b6:208:234::23) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|IA0PR12MB8908:EE_ X-MS-Office365-Filtering-Correlation-Id: 5e45bf64-982e-4846-b091-08de728bf93b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7416014; 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Signed-off-by: Zi Yan Cc: Christian Brauner Cc: K Prateek Nayak Cc: Davidlohr Bueso Cc: Eric Sandeen --- kernel/watch_queue.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/kernel/watch_queue.c b/kernel/watch_queue.c index 52f89f1137da..8f887eafd438 100644 --- a/kernel/watch_queue.c +++ b/kernel/watch_queue.c @@ -301,8 +301,10 @@ long watch_queue_set_size(struct pipe_inode_info *pipe, unsigned int nr_notes) return 0; error_p: - while (--i >= 0) + while (--i >= 0) { + set_page_private(pages[i], 0); __free_page(pages[i]); + } kfree(pages); error: (void) account_pipe_buffers(pipe->user, nr_pages, pipe->nr_accounted); @@ -398,8 +400,10 @@ static void __put_watch_queue(struct kref *kref) struct watch_filter *wfilter; int i; - for (i = 0; i < wqueue->nr_pages; i++) + for (i = 0; i < wqueue->nr_pages; i++) { + set_page_private(wqueue->notes[i], 0); __free_page(wqueue->notes[i]); + } kfree(wqueue->notes); bitmap_free(wqueue->notes_bitmap); -- 2.51.0