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 CDD28C4332F for ; Sat, 17 Dec 2022 15:41:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231512AbiLQPlN (ORCPT ); Sat, 17 Dec 2022 10:41:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231386AbiLQPj6 (ORCPT ); Sat, 17 Dec 2022 10:39:58 -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 72D6813E13; Sat, 17 Dec 2022 07:31:18 -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 6A838B8049B; Sat, 17 Dec 2022 15:31:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5D98DC433F1; Sat, 17 Dec 2022 15:31:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1671291062; bh=UwPT3DNk5t4dSFGTTejzKR0Qkzhat5PlsoNZ741aEzY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FZJQucnrKN80HbgGkfK0666V8R2xqe/aavTiEYu0lYbS3XTCAcX/RIpY8eH3IC/V4 rR74Jj8F3PDSxldheDLea6BOh/yRHVOcZanQE2BNLyiBSMjibaf1Cpqgwv6Lj0tJq6 o6qRc7PNNFyCZLKRNib1DBja22MJJ5a8v03qeGVYOoRI3rlrgQnWNhDV8VPAobY3t9 OJffmsp0Hl2EpvB75q0qfXmcVCyoTlTIFPS7+PlxNAWjYdU3Y+uO0UNHINzoqDaCht Jfo8vKjrMkI+ixNhImIxpH9LCoEwMJxpaZFtDiHKwTe8+VGMVq2WPsPbJabYkrLU3d JeGicaVcyhvBw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Rafael J. Wysocki" , Chen Zhongjin , Sasha Levin , robert.moore@intel.com, linux-acpi@vger.kernel.org, devel@acpica.org Subject: [PATCH AUTOSEL 4.9 4/8] ACPICA: Fix error code path in acpi_ds_call_control_method() Date: Sat, 17 Dec 2022 10:30:48 -0500 Message-Id: <20221217153053.99513-4-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221217153053.99513-1-sashal@kernel.org> References: <20221217153053.99513-1-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 404ec60438add1afadaffaed34bb5fe4ddcadd40 ] A use-after-free in acpi_ps_parse_aml() after a failing invocaion of acpi_ds_call_control_method() is reported by KASAN [1] and code inspection reveals that next_walk_state pushed to the thread by acpi_ds_create_walk_state() is freed on errors, but it is not popped from the thread beforehand. Thus acpi_ds_get_current_walk_state() called by acpi_ps_parse_aml() subsequently returns it as the new walk state which is incorrect. To address this, make acpi_ds_call_control_method() call acpi_ds_pop_walk_state() to pop next_walk_state from the thread before returning an error. Link: https://lore.kernel.org/linux-acpi/20221019073443.248215-1-chenzhongjin@huawei.com/ # [1] Reported-by: Chen Zhongjin Signed-off-by: Rafael J. Wysocki Reviewed-by: Chen Zhongjin Signed-off-by: Sasha Levin --- drivers/acpi/acpica/dsmethod.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c index 2b3210f42a46..b77d6b86e3f9 100644 --- a/drivers/acpi/acpica/dsmethod.c +++ b/drivers/acpi/acpica/dsmethod.c @@ -547,7 +547,7 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread, info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); if (!info) { status = AE_NO_MEMORY; - goto cleanup; + goto pop_walk_state; } info->parameters = &this_walk_state->operands[0]; @@ -559,7 +559,7 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread, ACPI_FREE(info); if (ACPI_FAILURE(status)) { - goto cleanup; + goto pop_walk_state; } /* @@ -591,6 +591,12 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread, return_ACPI_STATUS(status); +pop_walk_state: + + /* On error, pop the walk state to be deleted from thread */ + + acpi_ds_pop_walk_state(thread); + cleanup: /* On error, we must terminate the method properly */ -- 2.35.1