From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7B6CF4B7A35; Thu, 17 Sep 2026 17:55:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789667752; cv=none; b=Ib6mBdDo2BIG38mYe887CPfTu3vqA2O4et4/ns0+vx2IsKyFwKYSNJCQT/TJY5mv7PpNVvGeFDKHy7RP2E4dwyZixzIpB79xbiuFO53OKdmLFT3k/7+29TCyQ1ZA0NCUZGpkpOKaVV3VEW9p8f5JM6QOo25iyj+YSCl6L3+IJv4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789667752; c=relaxed/simple; bh=EHmUV3sK0tP2VZ0SQ5VubvPzC/8Pn9OVSLESEjGlqTM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nYijRd6lha3yyeXS1BXQUkIT3Yegi5cJvZoFJpzXN5vCcv3RfxN10Dg83CPd/Bei23hFooi54LWEJGTWaMCcfeUyhAom8XoxXYYRy3u2LOl7k35PrnGGWdqIb12cSwHrSdM1xYHi1LOkW3hk2LDQ/eVpCj25L84Z3/vUzsPBxAs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=r1SmsZQf; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="r1SmsZQf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1E7A1F000FF; Thu, 17 Sep 2026 17:55:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789667751; bh=AC+MGWcoUNpEt4aj1IY6OYc3qG9qxwPLLk7G16Tc24w=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=r1SmsZQfFnu0d565hJTyL7OpnQCv7qxHgNTxybY830VoUT8oX00mEC3vYGPrpmbF+ bRIdD6YOWmD2aka5cYfNGR++qiNuE9xU/sGVMbmpfW5Yis5IhJvQfjNkc2QLOCbxHU HOwhW/zLgoVXJNA6qDZkoQ20Mq++n5nY6D0FXtSY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, ikaros , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 6.12 0170/1102] ACPICA: Add validation for node in acpi_ns_build_normalized_path() Date: Thu, 17 Sep 2026 16:01:53 +0100 Message-ID: <20260917151543.808928838@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151539.408551884@linuxfoundation.org> References: <20260917151539.408551884@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: ikaros [ Upstream commit 96b2b616870e46e2bc04efec03879683a0036e66 ] Add validation for node in acpi_ns_build_normalized_path() to prevent use-after-free vulnerabilities. Link: https://github.com/acpica/acpica/commit/b35adf49e89a Signed-off-by: ikaros Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/118666237.nniJfEyVGO@rafael.j.wysocki Signed-off-by: Sasha Levin --- drivers/acpi/acpica/nsnames.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/acpi/acpica/nsnames.c b/drivers/acpi/acpica/nsnames.c index d91153f657005..ab6d217d31db4 100644 --- a/drivers/acpi/acpica/nsnames.c +++ b/drivers/acpi/acpica/nsnames.c @@ -222,6 +222,12 @@ acpi_ns_build_normalized_path(struct acpi_namespace_node *node, goto build_trailing_null; } + /* Validate the Node to avoid use-after-free vulnerabilities */ + + if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) { + goto build_trailing_null; + } + next_node = node; while (next_node && next_node != acpi_gbl_root_node) { if (next_node != node) { -- 2.53.0