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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD90BC433E1 for ; Thu, 20 Aug 2020 09:28:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9561F2173E for ; Thu, 20 Aug 2020 09:28:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597915700; bh=qJmEpL7tQCrTn65OLAj/uvcxZFClayXp+iHkQUQEPGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yZWs9fXZr2AFwhLEfIc67S0c7YjUNyl+GWqBtC30ToXKLZpElLhyTdQ+hEKlKRiFX Ptzs0YIb0kGeDAiR1P5Bu8s2ZS0tt8JNlccG36ZA2+gn7SyuOgp9/knZcJHb9VTRXl O4r2Q57JPtAXh40tdejdcVEL/mJdBpzyv6TVqSi4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726930AbgHTJ2O (ORCPT ); Thu, 20 Aug 2020 05:28:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:34832 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727936AbgHTJ04 (ORCPT ); Thu, 20 Aug 2020 05:26:56 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1367322D2C; Thu, 20 Aug 2020 09:26:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597915615; bh=qJmEpL7tQCrTn65OLAj/uvcxZFClayXp+iHkQUQEPGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SElX8l4P0ygjJRsOue7LR99wPuglwvyOqANe5RQ2mV/l3gpwqc8CmeXCmAqGLpAEi 1X6TXyRgu4g8qMQc/n3rcLiYB6P8Q+Yze6Z76JkkZaAVedAchi+dVKVDzWaGZlno1m srJYnuL/C0ihMRe0GyvdkBos6vjlwtgfg2l77W7Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mikulas Patocka , Jan Kara Subject: [PATCH 5.8 076/232] ext2: fix missing percpu_counter_inc Date: Thu, 20 Aug 2020 11:18:47 +0200 Message-Id: <20200820091616.491366598@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820091612.692383444@linuxfoundation.org> References: <20200820091612.692383444@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mikulas Patocka commit bc2fbaa4d3808aef82dd1064a8e61c16549fe956 upstream. sbi->s_freeinodes_counter is only decreased by the ext2 code, it is never increased. This patch fixes it. Note that sbi->s_freeinodes_counter is only used in the algorithm that tries to find the group for new allocations, so this bug is not easily visible (the only visibility is that the group finding algorithm selects inoptinal result). Link: https://lore.kernel.org/r/alpine.LRH.2.02.2004201538300.19436@file01.intranet.prod.int.rdu2.redhat.com Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org Signed-off-by: Jan Kara Signed-off-by: Greg Kroah-Hartman --- fs/ext2/ialloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/ext2/ialloc.c +++ b/fs/ext2/ialloc.c @@ -80,6 +80,7 @@ static void ext2_release_inode(struct su if (dir) le16_add_cpu(&desc->bg_used_dirs_count, -1); spin_unlock(sb_bgl_lock(EXT2_SB(sb), group)); + percpu_counter_inc(&EXT2_SB(sb)->s_freeinodes_counter); if (dir) percpu_counter_dec(&EXT2_SB(sb)->s_dirs_counter); mark_buffer_dirty(bh); @@ -528,7 +529,7 @@ got: goto fail; } - percpu_counter_add(&sbi->s_freeinodes_counter, -1); + percpu_counter_dec(&sbi->s_freeinodes_counter); if (S_ISDIR(mode)) percpu_counter_inc(&sbi->s_dirs_counter);