linux-kernel - [PATCH 3.16 45/72] fuse: fix missing unlock_page in fuse

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Date:   Sun, 08 Dec 2019 13:53:29 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Vasily Averin" <vvs@...tuozzo.com>,
        "Miklos Szeredi" <mszeredi@...hat.com>
Subject: [PATCH 3.16 45/72] fuse: fix missing unlock_page in fuse_writepage()

3.16.79-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Vasily Averin <vvs@...tuozzo.com>

commit d5880c7a8620290a6c90ced7a0e8bd0ad9419601 upstream.

unlock_page() was missing in case of an already in-flight write against the
same page.

Signed-off-by: Vasily Averin <vvs@...tuozzo.com>
Fixes: ff17be086477 ("fuse: writepage: skip already in flight")
Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 fs/fuse/file.c | 1 +
 1 file changed, 1 insertion(+)

--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1767,6 +1767,7 @@ static int fuse_writepage(struct page *p
 		WARN_ON(wbc->sync_mode == WB_SYNC_ALL);
 
 		redirty_page_for_writepage(wbc, page);
+		unlock_page(page);
 		return 0;
 	}