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 92013C433FE for ; Mon, 24 Jan 2022 19:11:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347184AbiAXTJt (ORCPT ); Mon, 24 Jan 2022 14:09:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345275AbiAXTDN (ORCPT ); Mon, 24 Jan 2022 14:03:13 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C24DC06174E; Mon, 24 Jan 2022 10:58:59 -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 ams.source.kernel.org (Postfix) with ESMTPS id CCE11B8122C; Mon, 24 Jan 2022 18:58:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 01645C340E5; Mon, 24 Jan 2022 18:58:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643050736; bh=yqra3Bl1aJz0zvUd6eMq6pYqBx4bxEbp699g1+233U8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UXgy7v9U9uhiD4IxrqTiDfjUijmZXa+FX02gK6+40Vj1io9mpAk0XVkhKO9zOmmWI vWf+cNYBsriQfjxFBivKh0yRGsn+5+a/T6nsRzqKLPUTHa10V5TuepBrVNgc0B/1Sk gfWagipdpcotfL2saiEFBneb1JD46l8diePGlesY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lenny Szubowicz , "Rafael J. Wysocki" , Bob Moore , Sasha Levin Subject: [PATCH 4.9 096/157] ACPICA: Executer: Fix the REFCLASS_REFOF case in acpi_ex_opcode_1A_0T_1R() Date: Mon, 24 Jan 2022 19:43:06 +0100 Message-Id: <20220124183935.819994578@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124183932.787526760@linuxfoundation.org> References: <20220124183932.787526760@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 007300433cdea..1cea26a741474 100644 --- a/drivers/acpi/acpica/exoparg1.c +++ b/drivers/acpi/acpica/exoparg1.c @@ -1029,7 +1029,8 @@ 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