From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f199.google.com (mail-pf0-f199.google.com [209.85.192.199]) by kanga.kvack.org (Postfix) with ESMTP id 588236B0009 for ; Mon, 26 Feb 2018 23:29:07 -0500 (EST) Received: by mail-pf0-f199.google.com with SMTP id x7so4270270pfd.19 for ; Mon, 26 Feb 2018 20:29:07 -0800 (PST) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTPS id o3-v6si6495676pld.591.2018.02.26.20.29.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 26 Feb 2018 20:29:06 -0800 (PST) Subject: [PATCH v4 01/12] dax: fix vma_is_fsdax() helper From: Dan Williams Date: Mon, 26 Feb 2018 20:20:00 -0800 Message-ID: <151970519993.26729.274277383890046437.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <151970519370.26729.1011551137381425076.stgit@dwillia2-desk3.amr.corp.intel.com> References: <151970519370.26729.1011551137381425076.stgit@dwillia2-desk3.amr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: linux-nvdimm@lists.01.org Cc: Jane Chu , Haozhong Zhang , Jan Kara , linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux-mm@kvack.org, Gerd Rausch , linux-fsdevel@vger.kernel.org Gerd reports that ->i_mode may contain other bits besides S_IFCHR. Use S_ISCHR() instead. Otherwise, get_user_pages_longterm() may fail on device-dax instances when those are meant to be explicitly allowed. Fixes: 2bb6d2837083 ("mm: introduce get_user_pages_longterm") Cc: Reported-by: Gerd Rausch Acked-by: Jane Chu Reported-by: Haozhong Zhang Reviewed-by: Jan Kara Signed-off-by: Dan Williams --- include/linux/fs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/fs.h b/include/linux/fs.h index 2a815560fda0..79c413985305 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3198,7 +3198,7 @@ static inline bool vma_is_fsdax(struct vm_area_struct *vma) if (!vma_is_dax(vma)) return false; inode = file_inode(vma->vm_file); - if (inode->i_mode == S_IFCHR) + if (S_ISCHR(inode->i_mode)) return false; /* device-dax */ return true; } -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org