linux-kernel - [PATCH 5.7 1/1] fuse: fix weird page warning

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Message-Id: <20200721185459.103445-1-andrealmeid@collabora.com>
Date:   Tue, 21 Jul 2020 15:54:59 -0300
From:   André Almeida <andrealmeid@...labora.com>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     kernel@...labora.com, linux-fsdevel@...r.kernel.org,
        gregkh@...uxfoundation.org, sashal@...nel.org,
        krisman@...labora.com,
        André Almeida <andrealmeid@...labora.com>,
        Nikolaus Rath <Nikolaus@...h.org>,
        Hugh Dickins <hughd@...gle.com>,
        Miklos Szeredi <mszeredi@...hat.com>
Subject: [PATCH 5.7 1/1] fuse: fix weird page warning

From: Miklos Szeredi <mszeredi@...hat.com>

commit a5005c3cda6eeb6b95645e6cc32f58dafeffc976 upstream.

When PageWaiters was added, updating this check was missed.

Reported-by: Nikolaus Rath <Nikolaus@...h.org>
Reported-by: Hugh Dickins <hughd@...gle.com>
Fixes: 62906027091f ("mm: add PageWaiters indicating tasks are waiting for a page bit")
Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Signed-off-by: André Almeida <andrealmeid@...labora.com>
---
 fs/fuse/dev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 5c155437a455..ec02c3240176 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -771,7 +771,8 @@ static int fuse_check_page(struct page *page)
 	       1 << PG_uptodate |
 	       1 << PG_lru |
 	       1 << PG_active |
-	       1 << PG_reclaim))) {
+	       1 << PG_reclaim |
+	       1 << PG_waiters))) {
 		pr_warn("trying to steal weird page\n");
 		pr_warn("  page=%p index=%li flags=%08lx, count=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(page), page->mapping);
 		return 1;
-- 
2.27.0