From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5334D8494 for ; Thu, 5 Jan 2023 13:05:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B12E3C433D2; Thu, 5 Jan 2023 13:05:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672923945; bh=pKKGgtqI6fELRiiCR1Hbq+evu49cEuQoaDxrNgOMJqQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dwLwv9UaLkCa4/iixnGDpAwMrPjfoaKGBksQD63KlyPnsvaDgwuwuFg6AAuxRbQh5 R4RB4zUAB5x99xbHj0xzZRzHZZfNYJhzEIzZZemW6tjbDDEDrBaiPBNssPxZqnB+kk pBwNeiebVcRTUzQQsszgzH1kwDGZ09nWxZHQNK1Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chen Zhongjin , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 4.9 183/251] ACPICA: Fix error code path in acpi_ds_call_control_method() Date: Thu, 5 Jan 2023 13:55:20 +0100 Message-Id: <20230105125343.176924661@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230105125334.727282894@linuxfoundation.org> References: <20230105125334.727282894@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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