From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x227QZL/Gg1IEHgHk6hZiRiGlaCVoXOWxurSkh85PQVbOe3tcC9uGN8o5V/8HSwRlAnlFjsx9 ARC-Seal: i=1; a=rsa-sha256; t=1518708495; cv=none; d=google.com; s=arc-20160816; b=CZ+fyQiQ4pVW+P5tBJoBg00YJXwfbOCVKqkY5CnztjyOuBIFxQk9uHCc2efkzMFebR /l1/cx70jobi5EyGqhkcoxcq0JsNmR59XJT8CUnmgMSk0P8PHaEmq7H4wBMDNi8tFDt7 n9K1WheMEdrrybrf1XGTg+0Umnwg1PefT2d50z0boelBpg1MsXV1jKTHKYVyzLpgY8u3 Z2LtU4QlpXO0ZW6eZEodYDm+TseBO964K/lV2gMVs1Y017IxZpsM+JsAB84t/oRCdw6K QZ4HMIbzEcZKDGH1/2/fn8OlcakHdgO4yQayYCGaLkjeE7l6aUutFYIObK992SKqbK9a WxRA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=wHR42FEeuCFbKrhbn5cfVqSYlNQS9rRrty6z1lzw+J4=; b=yFm+E90PSlQESk+O9GfqnvKETCwT2burl+nMH/WmcCM495j3ydu8o7P9OdcZs1/tDl vZAKqfJVHny3BfZ6k77tSvBEt2sLDR+SQoVJ08NHOdyJPKTQDCGb2jmHtJVkQhq8MMOI HJiftxGkzXbFVhVooPngAkala3lKggD2qJXeWxq8dm4mpBDtQkyKY5Zssz4taIphSkVd S443SF2zGr2nncs9iy8qR6/B2vIqtHWBMHDbG8z2lenXe0w06yc1GzVuzltFL+kcoZEa HLbmZVSRVT7kpdYqffdnvt1gfgqGLZkVLU9FOWQ5M40pMry8NaSs/mmDUlUhD/0o4QMk /Jcw== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Trond Myklebust Subject: [PATCH 4.9 26/88] NFS: Fix a race between mmap() and O_DIRECT Date: Thu, 15 Feb 2018 16:16:53 +0100 Message-Id: <20180215151226.311791271@linuxfoundation.org> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180215151222.437136975@linuxfoundation.org> References: <20180215151222.437136975@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1592481280163816585?= X-GMAIL-MSGID: =?utf-8?q?1592481280163816585?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Trond Myklebust commit e231c6879cfd44e4fffd384bb6dd7d313249a523 upstream. When locking the file in order to do O_DIRECT on it, we must unmap any mmapped ranges on the pagecache so that we can flush out the dirty data. Fixes: a5864c999de67 ("NFS: Do not serialise O_DIRECT reads and writes") Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/nfs/io.c +++ b/fs/nfs/io.c @@ -98,7 +98,7 @@ static void nfs_block_buffered(struct nf { if (!test_bit(NFS_INO_ODIRECT, &nfsi->flags)) { set_bit(NFS_INO_ODIRECT, &nfsi->flags); - nfs_wb_all(inode); + nfs_sync_mapping(inode->i_mapping); } }