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 DCB79C35264 for ; Tue, 18 Jan 2022 03:16:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348853AbiARDQL (ORCPT ); Mon, 17 Jan 2022 22:16:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343826AbiARDG1 (ORCPT ); Mon, 17 Jan 2022 22:06:27 -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 8DCF7C08EDC7; Mon, 17 Jan 2022 18:48:42 -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 125616130A; Tue, 18 Jan 2022 02:48:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 96B41C36AF2; Tue, 18 Jan 2022 02:48:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642474121; bh=HXBz4iIj6SssWXxb0Jk5bHyZF6LEh0NLFm3vPNBODT0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dma4SAeSva9obi5FbhyeZ2IB5I/hzXfbPeQ3Su7FvkZVCFyBO3+BtAmWAc64OlpC0 cauRWz+46o0vBM82J5JBwcbyJltsaexFsSz+FuNfJR0+o4GiSQGi9hWOoeERAOBr29 ckCW97cVsMMfj28GXqn9rOriBvJxiV3O6YpVNMeMMtxT/ZeCWG7jleMUrUTl5wcitF sveC/8P3IKK7OrycY5eisZe7WL+vFg11sT3EfsaDHXX5ha30V6gl+78jPQd8ILtYR2 UWaCVfGAoEIYi743HzMEytaYYJmCs+8xXMZrBp7w5E2jW8RoInR7CnHr9hRHBccTBY +0EaR0eS5kHLw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Rafael J. Wysocki" , Lenny Szubowicz , Bob Moore , Sasha Levin , linux-acpi@vger.kernel.org, devel@acpica.org Subject: [PATCH AUTOSEL 4.19 44/59] ACPICA: Executer: Fix the REFCLASS_REFOF case in acpi_ex_opcode_1A_0T_1R() Date: Mon, 17 Jan 2022 21:46:45 -0500 Message-Id: <20220118024701.1952911-44-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220118024701.1952911-1-sashal@kernel.org> References: <20220118024701.1952911-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: "Rafael J. Wysocki" [ Upstream commit 24ea5f90ec9548044a6209685c5010edd66ffe8f ] ACPICA commit d984f12041392fa4156b52e2f7e5c5e7bc38ad9e If Operand[0] is a reference of the ACPI_REFCLASS_REFOF class, acpi_ex_opcode_1A_0T_1R () calls acpi_ns_get_attached_object () to obtain return_desc which may require additional resolution with the help of acpi_ex_read_data_from_field (). If the latter fails, the reference counter of the original return_desc is decremented which is incorrect, because acpi_ns_get_attached_object () does not increment the reference counter of the object returned by it. This issue may lead to premature deletion of the attached object while it is still attached and a use-after-free and crash in the host OS. For example, this may happen when on evaluation of ref_of() a local region field where there is no registered handler for the given Operation Region. Fix it by making acpi_ex_opcode_1A_0T_1R () return Status right away after a acpi_ex_read_data_from_field () failure. Link: https://github.com/acpica/acpica/commit/d984f120 Link: https://github.com/acpica/acpica/pull/685 Reported-by: Lenny Szubowicz Signed-off-by: Rafael J. Wysocki Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/acpica/exoparg1.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/acpica/exoparg1.c b/drivers/acpi/acpica/exoparg1.c index ba9fbae0cf91f..319f4bc6a8394 100644 --- a/drivers/acpi/acpica/exoparg1.c +++ b/drivers/acpi/acpica/exoparg1.c @@ -1007,7 +1007,8 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state) (walk_state, return_desc, &temp_desc); if (ACPI_FAILURE(status)) { - goto cleanup; + return_ACPI_STATUS + (status); } return_desc = temp_desc; -- 2.34.1