From patchwork Wed Jul 29 03:44:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Hao" X-Patchwork-Id: 11690313 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8DD0F14DD for ; Wed, 29 Jul 2020 03:44:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7ABCB2078E for ; Wed, 29 Jul 2020 03:44:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726825AbgG2Dos (ORCPT ); Tue, 28 Jul 2020 23:44:48 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:52800 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726245AbgG2Dos (ORCPT ); Tue, 28 Jul 2020 23:44:48 -0400 X-IronPort-AV: E=Sophos;i="5.75,408,1589212800"; d="scan'208";a="97041138" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 29 Jul 2020 11:44:42 +0800 Received: from G08CNEXMBPEKD04.g08.fujitsu.local (unknown [10.167.33.201]) by cn.fujitsu.com (Postfix) with ESMTP id 0B1834CE38CB; Wed, 29 Jul 2020 11:44:38 +0800 (CST) Received: from G08CNEXCHPEKD06.g08.fujitsu.local (10.167.33.205) by G08CNEXMBPEKD04.g08.fujitsu.local (10.167.33.201) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 29 Jul 2020 11:44:37 +0800 Received: from localhost.localdomain (10.167.225.206) by G08CNEXCHPEKD06.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 29 Jul 2020 11:44:37 +0800 From: Hao Li To: CC: , , , , , , Subject: [PATCH] dax: Fix wrong error-number passed into xas_set_err() Date: Wed, 29 Jul 2020 11:44:36 +0800 Message-ID: <20200729034436.24267-1-lihao2018.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-yoursite-MailScanner-ID: 0B1834CE38CB.A1DB9 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: lihao2018.fnst@cn.fujitsu.com X-Spam-Status: No Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The error-number passed into xas_set_err() should be negative. Otherwise, the xas_error() will return 0, and grab_mapping_entry() will return the found entry instead of a SIGBUS error when the entry is not a value. And then, the subsequent code path would be wrong. Signed-off-by: Hao Li Reviewed-by: Pankaj Gupta --- fs/dax.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/dax.c b/fs/dax.c index 11b16729b86f..acac675fe7a6 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -488,7 +488,7 @@ static void *grab_mapping_entry(struct xa_state *xas, if (dax_is_conflict(entry)) goto fallback; if (!xa_is_value(entry)) { - xas_set_err(xas, EIO); + xas_set_err(xas, -EIO); goto out_unlock; }