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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 DFB05C433B4 for ; Mon, 12 Apr 2021 07:38:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B6E3661207 for ; Mon, 12 Apr 2021 07:38:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236901AbhDLHjC (ORCPT ); Mon, 12 Apr 2021 03:39:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48734 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236892AbhDLHjA (ORCPT ); Mon, 12 Apr 2021 03:39:00 -0400 Received: from mail-wr1-x430.google.com (mail-wr1-x430.google.com [IPv6:2a00:1450:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE40FC061574 for ; Mon, 12 Apr 2021 00:38:42 -0700 (PDT) Received: by mail-wr1-x430.google.com with SMTP id 12so11808254wrz.7 for ; Mon, 12 Apr 2021 00:38:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=philpotter-co-uk.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=8Ba8vkc1BfSZosx3uGhz1pPY/j875HME7u94kJO8dVU=; b=0x8a4/DegqzPKaTGbhPHvPJhPWy/aa5JytZrFbsC8wsCwIBTtA1WnY5EWX3FzqxELy EYTgKov9wazo9LP0UvtmbsB21XV7dVMFd2HWIuZo+cUsrrib+UIVKeMrWPfymIe5RzrH BN2Rhz1OIvsXP/3jiip/xT9TAAqOJlNqt9oArDXXvdqxCIhVsNHfLf/uzd91d7h47PMz QI4rp6aRpSc43K1z5S56aTRvX3vzegYSRyX7ES6ZRMNrqbncQMxt1sDbsJeVVQ89/MZO S5azl9liCp4shlG2+3ZS+rpHsORfgKadr5osWlhs2dt2c9vnYmnVULm6mv18nqYDruAI UOMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=8Ba8vkc1BfSZosx3uGhz1pPY/j875HME7u94kJO8dVU=; b=XhtkGSajDvA1z5UxhwWXLg1yvgTtbdjoomrlTa7ZM9KMaTB0VPGtpxU68oAool4Abk JsXeRxFkoyq0zoptkP7nIk78YL07V6f4A9f1dF3aki+XVC+LzRbHPHjooUfglCrnfoSi I7S1Q8hRuI0M+xQbms8/CE1VmHFHgEpx/TP3WZ3OFzfihvYnza4KWA0N8+LHPEwnRTrS udkbeLfaDCUVHCMi3by+7RWdZzzoa/ghuauC3JOaNqbfg3peAak0RkIH8W0fHVnRNm0/ LPs5Gv8v+h6XYcuuw2urJAlR8bL00Fs+hQj3SUW+Hnj0r1vLqxYJh7raPmHpDWkEBuBG 0blQ== X-Gm-Message-State: AOAM531F634ohKCd9enCX7ihJ7P/tw4gG/TQ3LPCL6agTVSIbkzz0RLk +LHbLpFbyfjG+u14hD+ReBWJ+eta9gsTQ6f5VP0= X-Google-Smtp-Source: ABdhPJzNN7fVoaZnxbco4trv/zzU5GvG94C3eALL0Sf+45NIZ9FIrtRyn1CXac5tVYi+dTm6fHT22w== X-Received: by 2002:adf:e402:: with SMTP id g2mr30527861wrm.1.1618213120778; Mon, 12 Apr 2021 00:38:40 -0700 (PDT) Received: from localhost.localdomain (2.0.5.1.1.6.3.8.5.c.c.3.f.b.d.3.0.0.0.0.6.1.f.d.0.b.8.0.1.0.0.2.ip6.arpa. [2001:8b0:df16:0:3dbf:3cc5:8361:1502]) by smtp.gmail.com with ESMTPSA id y31sm14500431wmp.46.2021.04.12.00.38.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Apr 2021 00:38:40 -0700 (PDT) From: Phillip Potter To: tytso@mit.edu Cc: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] fs: ext4: mballoc: amend goto to cleanup groupinfo memory correctly Date: Mon, 12 Apr 2021 08:38:37 +0100 Message-Id: <20210412073837.1686-1-phil@philpotter.co.uk> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When flexible block groups are enabled on a filesystem, and there are too many log groups per flexible block group, goto err_freebuddy rather than err_freesgi within ext4_mb_init_backend. Cleanup code for new_inode and successive executions of ext4_mb_add_groupinfo in the previous loop is then correctly run. Fixes memory leak reported by syzbot at: https://syzkaller.appspot.com/bug?extid=aa12d6106ea4ca1b6aae Reported-by: syzbot+aa12d6106ea4ca1b6aae@syzkaller.appspotmail.com Signed-off-by: Phillip Potter --- fs/ext4/mballoc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index a02fadf4fc84..d24cb3dc79ff 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2715,7 +2715,7 @@ static int ext4_mb_init_backend(struct super_block *sb) */ if (sbi->s_es->s_log_groups_per_flex >= 32) { ext4_msg(sb, KERN_ERR, "too many log groups per flexible block group"); - goto err_freesgi; + goto err_freebuddy; } sbi->s_mb_prefetch = min_t(uint, 1 << sbi->s_es->s_log_groups_per_flex, BLK_MAX_SEGMENT_SIZE >> (sb->s_blocksize_bits - 9)); -- 2.30.2