From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 77E12C3A5A1 for ; Mon, 18 Apr 2022 13:32:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240866AbiDRNeq (ORCPT ); Mon, 18 Apr 2022 09:34:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244880AbiDRNbA (ORCPT ); Mon, 18 Apr 2022 09:31:00 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC8D32A5; Mon, 18 Apr 2022 05:56:57 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 87D11612BB; Mon, 18 Apr 2022 12:56:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B388C385A9; Mon, 18 Apr 2022 12:56:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650286617; bh=ASvl4kzOlN2JBFPVcDkp6qC7onoQI+kOPopbQo3QmCk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lQX+TmUTToZ5sfVUS/vL60b8Cc2mKayvZkYWw+xqjnbTuzIUCR7QtGJ8EKmW3L8HS ZV4r7DgDsGmGWxfS74DiviQRznIV3rWgL8Ng0x5X0qLmtx3Nr6ERHCykg8o7Ix03J3 RFPOvV0C6EWXCCq2zYFjJmCa6QCURv7zKaL/fgxQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrew Price , Andreas Gruenbacher Subject: [PATCH 4.14 191/284] gfs2: Make sure FITRIM minlen is rounded up to fs block size Date: Mon, 18 Apr 2022 14:12:52 +0200 Message-Id: <20220418121217.165187102@linuxfoundation.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220418121210.689577360@linuxfoundation.org> References: <20220418121210.689577360@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Andrew Price commit 27ca8273fda398638ca994a207323a85b6d81190 upstream. Per fstrim(8) we must round up the minlen argument to the fs block size. The current calculation doesn't take into account devices that have a discard granularity and requested minlen less than 1 fs block, so the value can get shifted away to zero in the translation to fs blocks. The zero minlen passed to gfs2_rgrp_send_discards() then allows sb_issue_discard() to be called with nr_sects == 0 which returns -EINVAL and results in gfs2_rgrp_send_discards() returning -EIO. Make sure minlen is never < 1 fs block by taking the max of the requested minlen and the fs block size before comparing to the device's discard granularity and shifting to fs blocks. Fixes: 076f0faa764ab ("GFS2: Fix FITRIM argument handling") Signed-off-by: Andrew Price Signed-off-by: Andreas Gruenbacher Signed-off-by: Greg Kroah-Hartman --- fs/gfs2/rgrp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -1380,7 +1380,8 @@ int gfs2_fitrim(struct file *filp, void start = r.start >> bs_shift; end = start + (r.len >> bs_shift); - minlen = max_t(u64, r.minlen, + minlen = max_t(u64, r.minlen, sdp->sd_sb.sb_bsize); + minlen = max_t(u64, minlen, q->limits.discard_granularity) >> bs_shift; if (end <= start || minlen > sdp->sd_max_rg_data)