From patchwork Fri Aug 19 15:40:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 12948897 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 29CFAC32773 for ; Fri, 19 Aug 2022 15:41:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350033AbiHSPlR (ORCPT ); Fri, 19 Aug 2022 11:41:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38274 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349924AbiHSPku (ORCPT ); Fri, 19 Aug 2022 11:40:50 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72DF810228B; Fri, 19 Aug 2022 08:40:41 -0700 (PDT) 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 0AD9FB8280C; Fri, 19 Aug 2022 15:40:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3C4B0C433D6; Fri, 19 Aug 2022 15:40:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660923638; bh=q01TiepYCgbd3YDF3Teq86Su7fa1NExU5eO/8Pw2Xpc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=inDF4Cwoo7ABxjN+YhYvvw4ANZWmqd2vqAXHKruCZ9hMbOoG3d77t1Mx8bjNe8XkG FGRGlLeINtiwKZMyhh3G0GbKQ75ICa5lZMHvNHWuRr/rbKsOlp65YF9q9JuGFOs06x AFg0PtkbzT9bVA2bv/QBJyymTc1V1Yu3SNfD/n7k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Baoquan He , kexec@lists.infradead.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, Michal Suchanek , Will Deacon , Coiby Xu , Mimi Zohar Subject: [PATCH 5.18 6/6] arm64: kexec_file: use more system keyrings to verify kernel image signature Date: Fri, 19 Aug 2022 17:40:18 +0200 Message-Id: <20220819153710.669386636@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220819153710.430046927@linuxfoundation.org> References: <20220819153710.430046927@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org From: Coiby Xu commit 0d519cadf75184a24313568e7f489a7fc9b1be3b upstream. Currently, when loading a kernel image via the kexec_file_load() system call, arm64 can only use the .builtin_trusted_keys keyring to verify a signature whereas x86 can use three more keyrings i.e. .secondary_trusted_keys, .machine and .platform keyrings. For example, one resulting problem is kexec'ing a kernel image would be rejected with the error "Lockdown: kexec: kexec of unsigned images is restricted; see man kernel_lockdown.7". This patch set enables arm64 to make use of the same keyrings as x86 to verify the signature kexec'ed kernel image. Fixes: 732b7b93d849 ("arm64: kexec_file: add kernel signature verification support") Cc: stable@vger.kernel.org # 105e10e2cf1c: kexec_file: drop weak attribute from functions Cc: stable@vger.kernel.org # 34d5960af253: kexec: clean up arch_kexec_kernel_verify_sig Cc: stable@vger.kernel.org # 83b7bb2d49ae: kexec, KEYS: make the code in bzImage64_verify_sig generic Acked-by: Baoquan He Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Co-developed-by: Michal Suchanek Signed-off-by: Michal Suchanek Acked-by: Will Deacon Signed-off-by: Coiby Xu Signed-off-by: Mimi Zohar Signed-off-by: Greg Kroah-Hartman --- arch/arm64/kernel/kexec_image.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) --- a/arch/arm64/kernel/kexec_image.c +++ b/arch/arm64/kernel/kexec_image.c @@ -14,7 +14,6 @@ #include #include #include -#include #include #include #include @@ -130,18 +129,10 @@ static void *image_load(struct kimage *i return NULL; } -#ifdef CONFIG_KEXEC_IMAGE_VERIFY_SIG -static int image_verify_sig(const char *kernel, unsigned long kernel_len) -{ - return verify_pefile_signature(kernel, kernel_len, NULL, - VERIFYING_KEXEC_PE_SIGNATURE); -} -#endif - const struct kexec_file_ops kexec_image_ops = { .probe = image_probe, .load = image_load, #ifdef CONFIG_KEXEC_IMAGE_VERIFY_SIG - .verify_sig = image_verify_sig, + .verify_sig = kexec_kernel_verify_pe_sig, #endif };