From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754082AbcAEUQl (ORCPT ); Tue, 5 Jan 2016 15:16:41 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:45297 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753279AbcAETsM (ORCPT ); Tue, 5 Jan 2016 14:48:12 -0500 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Al Viro , Jens Axboe , Kamal Mostafa Subject: [PATCH 4.2.y-ckt 113/211] dax_io(): don't let non-error value escape via retval instead of EFAULT Date: Tue, 5 Jan 2016 11:43:41 -0800 Message-Id: <1452023119-25647-114-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1452023119-25647-1-git-send-email-kamal@canonical.com> References: <1452023119-25647-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 4.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.2.8-ckt1 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Al Viro commit cadfbb6ec2e55171479191046142c927a8b12d87 upstream. Signed-off-by: Al Viro Reported-by: Sasha Levin Signed-off-by: Jens Axboe Signed-off-by: Kamal Mostafa --- fs/dax.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/dax.c b/fs/dax.c index ef35a20..a3eb5b0 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -162,8 +162,10 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter, else len = iov_iter_zero(max - pos, iter); - if (!len) + if (!len) { + retval = -EFAULT; break; + } pos += len; addr += len; -- 1.9.1