From patchwork Mon Jan 24 18:41:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 534947 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 45021C35278 for ; Tue, 25 Jan 2022 00:06:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2369350AbiAYABd (ORCPT ); Mon, 24 Jan 2022 19:01:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1848236AbiAXXWB (ORCPT ); Mon, 24 Jan 2022 18:22:01 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0388C0219E6; Mon, 24 Jan 2022 13:28:51 -0800 (PST) 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 7073E61320; Mon, 24 Jan 2022 21:28:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5D476C33E61; Mon, 24 Jan 2022 21:28:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643059730; bh=+j/hF9KUbkWpVpF0TWD+CJhI+JZR0eec5rq0R+03JEU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jm7gwoBSmtArZ6qliUrCFMhWvZ1s7Zd0QK19u/VKyzZHPRYpcBk7I3CORfEBHFISd HnEPQPjBKiVRlbPeM5Xb/kh+yzbiM7PNM7knBL/ZwbWmNdBsjoZBmY8huuJpd38veN QUZW+lbujX2Z2xZ4m1DLHy8sW4uMAjfOjEMY6YlI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Joe Thornber , Mike Snitzer , Sasha Levin Subject: [PATCH 5.16 0714/1039] dm space map common: add bounds check to sm_ll_lookup_bitmap() Date: Mon, 24 Jan 2022 19:41:43 +0100 Message-Id: <20220124184149.335514594@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184125.121143506@linuxfoundation.org> References: <20220124184125.121143506@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Joe Thornber [ Upstream commit cba23ac158db7f3cd48a923d6861bee2eb7a2978 ] Corrupted metadata could warrant returning error from sm_ll_lookup_bitmap(). Signed-off-by: Joe Thornber Signed-off-by: Mike Snitzer Signed-off-by: Sasha Levin --- drivers/md/persistent-data/dm-space-map-common.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/md/persistent-data/dm-space-map-common.c b/drivers/md/persistent-data/dm-space-map-common.c index 4a6a2a9b4eb49..bfbfa750e0160 100644 --- a/drivers/md/persistent-data/dm-space-map-common.c +++ b/drivers/md/persistent-data/dm-space-map-common.c @@ -283,6 +283,11 @@ int sm_ll_lookup_bitmap(struct ll_disk *ll, dm_block_t b, uint32_t *result) struct disk_index_entry ie_disk; struct dm_block *blk; + if (b >= ll->nr_blocks) { + DMERR_LIMIT("metadata block out of bounds"); + return -EINVAL; + } + b = do_div(index, ll->entries_per_block); r = ll->load_ie(ll, index, &ie_disk); if (r < 0)