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 8A089C5AE4A for ; Wed, 15 Nov 2023 20:45:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233567AbjKOUpL (ORCPT ); Wed, 15 Nov 2023 15:45:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233601AbjKOUpI (ORCPT ); Wed, 15 Nov 2023 15:45:08 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4CC441B8 for ; Wed, 15 Nov 2023 12:45:05 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4033C433C8; Wed, 15 Nov 2023 20:45:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700081105; bh=xE9sHPSSJs9D4VxynDprAuDzDYMg3+OgLD/LZb87cVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rrWl+kqn4EC5VC5fb7x+REKWql+8fKwRLKQkg44gfiVU12yYbWsu39eFAcU52BqIv gly2ZYAGkwyFeztO8nt/ocsdB5e3hpT9MS8xaMoVFS+hTKJI4p9SApni4M6S3rvRet LdWvEZhiGwJJoNmpjZWsuZmpYpTvhCpX7lQ1ykM4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Gou Hao , Theodore Tso , Sasha Levin Subject: [PATCH 4.19 41/88] ext4: move ix sanity check to corrent position Date: Wed, 15 Nov 2023 15:35:53 -0500 Message-ID: <20231115191428.663813748@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115191426.221330369@linuxfoundation.org> References: <20231115191426.221330369@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Gou Hao [ Upstream commit af90a8f4a09ec4a3de20142e37f37205d4687f28 ] Check 'ix' before it is used. Fixes: 80e675f906db ("ext4: optimize memmmove lengths in extent/index insertions") Signed-off-by: Gou Hao Link: https://lore.kernel.org/r/20230906013341.7199-1-gouhao@uniontech.com Signed-off-by: Theodore Ts'o Signed-off-by: Sasha Levin --- fs/ext4/extents.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 6c492fca60c41..d931252b7d0d1 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -997,6 +997,11 @@ static int ext4_ext_insert_index(handle_t *handle, struct inode *inode, ix = curp->p_idx; } + if (unlikely(ix > EXT_MAX_INDEX(curp->p_hdr))) { + EXT4_ERROR_INODE(inode, "ix > EXT_MAX_INDEX!"); + return -EFSCORRUPTED; + } + len = EXT_LAST_INDEX(curp->p_hdr) - ix + 1; BUG_ON(len < 0); if (len > 0) { @@ -1006,11 +1011,6 @@ static int ext4_ext_insert_index(handle_t *handle, struct inode *inode, memmove(ix + 1, ix, len * sizeof(struct ext4_extent_idx)); } - if (unlikely(ix > EXT_MAX_INDEX(curp->p_hdr))) { - EXT4_ERROR_INODE(inode, "ix > EXT_MAX_INDEX!"); - return -EFSCORRUPTED; - } - ix->ei_block = cpu_to_le32(logical); ext4_idx_store_pblock(ix, ptr); le16_add_cpu(&curp->p_hdr->eh_entries, 1); -- 2.42.0