From patchwork Mon Aug 15 18:06:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 12944030 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 4FDE7C282E7 for ; Mon, 15 Aug 2022 19:53:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345465AbiHOTx2 (ORCPT ); Mon, 15 Aug 2022 15:53:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345314AbiHOTwO (ORCPT ); Mon, 15 Aug 2022 15:52:14 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8572A42AFA; Mon, 15 Aug 2022 11:50:46 -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 E9D0AB810A4; Mon, 15 Aug 2022 18:50:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0FA69C433C1; Mon, 15 Aug 2022 18:50:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660589443; bh=i3e/A4Zn400OOB+vPxUgs7Ypq6tOijgt4jkqF0Vp0po=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CHaNkVhg7GK3j8VoPJlTa1gGkscOjJfHuM4n3giZj1Xtcs6FsSQ73o1VqQLTn3e0H KxZ4IRY5hcEyYxKLciaOLkVxwCGw4oWuS2nBUjpmp35LbxtSiAJeKHtCYvR3tfMvgQ mL4qsXb45LiabAngYZFjCSqQbKGrZKT1Qyx4L1tE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Philipp Rudo , kexec@lists.infradead.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, Michal Suchanek , "Lee, Chun-Yi" , Baoquan He , Coiby Xu , Heiko Carstens , Mimi Zohar , Sasha Levin Subject: [PATCH 5.15 719/779] kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification Date: Mon, 15 Aug 2022 20:06:03 +0200 Message-Id: <20220815180408.186099124@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180337.130757997@linuxfoundation.org> References: <20220815180337.130757997@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Precedence: bulk List-ID: From: Michal Suchanek [ Upstream commit 0828c4a39be57768b8788e8cbd0d84683ea757e5 ] commit e23a8020ce4e ("s390/kexec_file: Signature verification prototype") adds support for KEXEC_SIG verification with keys from platform keyring but the built-in keys and secondary keyring are not used. Add support for the built-in keys and secondary keyring as x86 does. Fixes: e23a8020ce4e ("s390/kexec_file: Signature verification prototype") Cc: stable@vger.kernel.org Cc: Philipp Rudo Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Signed-off-by: Michal Suchanek Reviewed-by: "Lee, Chun-Yi" Acked-by: Baoquan He Signed-off-by: Coiby Xu Acked-by: Heiko Carstens Signed-off-by: Mimi Zohar Signed-off-by: Sasha Levin --- arch/s390/kernel/machine_kexec_file.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/arch/s390/kernel/machine_kexec_file.c b/arch/s390/kernel/machine_kexec_file.c index a81d6c43b9b6..3459362c54ac 100644 --- a/arch/s390/kernel/machine_kexec_file.c +++ b/arch/s390/kernel/machine_kexec_file.c @@ -29,6 +29,7 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) const unsigned long marker_len = sizeof(MODULE_SIG_STRING) - 1; struct module_signature *ms; unsigned long sig_len; + int ret; /* Skip signature verification when not secure IPLed. */ if (!ipl_secure_flag) @@ -63,11 +64,18 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) return -EBADMSG; } - return verify_pkcs7_signature(kernel, kernel_len, - kernel + kernel_len, sig_len, - VERIFY_USE_PLATFORM_KEYRING, - VERIFYING_MODULE_SIGNATURE, - NULL, NULL); + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_SECONDARY_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + return ret; } #endif /* CONFIG_KEXEC_SIG */