From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x2269tqwtx9m9R+YFIE7JmeJzaJAU776uAAAY+Nr55iQFPX8ENOm6Cgy1gkmKWVDVOXKgSlnj ARC-Seal: i=1; a=rsa-sha256; t=1518709393; cv=none; d=google.com; s=arc-20160816; b=ff3/RMZU4Fx6rmWSGOUqwmF7UG7kuX3vr60qpA7iSDgO9qxX8WbL6o0H//kl//zemS MioPpHR9uabxFv59KNoTFVbKAmAuR5nIN8Lr4e3CMpERHJwfD5+6/aguZuvgjN2F6Evj WDCz7YgAtXX6PKTkXcuK/DwmRVNAYuHOVutTFd7n5J79g6l7ZML4w8jrdasGWxe77/qB jqf89oQEIptzHtEb05LvZl4C5zCsxl65D1PLD+0lajaNa3RkEV3Z/m5JhZtj4skHCJjP bBATzMkRkwkO8DBwnWioOZqoM+mYqO5ZT1WCxGHzMr8MnM3ACuRng37qBe5/o6XnEtqY lu/Q== 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=WGp3g6B+7Q8JLNiiV2EU765747deKJp+alYFksimKBM=; b=txubfUiap+CllwM3T3XukETFOdY0Qcp/Rre3cn5e6ILIy/L9YN72sOjgf47Ro9uiZB HPXww9aHTQL5Nkh3nxgz3j2mUG0vrfkoq2XnNPIVZf8LZFRbDrxDB1B9CT1EMG7pnJl7 VdbEbczclCDiHuWyoUI73WYNmQrt3XPr8emNwyzpWJK8B4amVT6gjqk4fT9sehGas05M PHSoanxqlXxd7OTome2SQC4nQMBTmVjxFLct0rczoqz45oJshKseITxWt4eYoW0t9rbf dQAt0ElR49BwY1HJFAxX7OMGa+hcJkgRr2bkPR0t0RJikwy3SVF5NzAR95N5w2cOCskG brrg== 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 4.15 102/202] NFS: Fix a race between mmap() and O_DIRECT Date: Thu, 15 Feb 2018 16:16:42 +0100 Message-Id: <20180215151718.630262423@linuxfoundation.org> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180215151712.768794354@linuxfoundation.org> References: <20180215151712.768794354@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?1592482220965824292?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.15-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 @@ -99,7 +99,7 @@ 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); } }