From patchwork Wed Dec 7 10:54:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 13066977 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 1D374C4708D for ; Wed, 7 Dec 2022 10:55:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229560AbiLGKz2 (ORCPT ); Wed, 7 Dec 2022 05:55:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229437AbiLGKz1 (ORCPT ); Wed, 7 Dec 2022 05:55:27 -0500 Received: from frasgout13.his.huawei.com (frasgout13.his.huawei.com [14.137.139.46]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6223611C21; Wed, 7 Dec 2022 02:55:19 -0800 (PST) Received: from mail02.huawei.com (unknown [172.18.147.229]) by frasgout13.his.huawei.com (SkyGuard) with ESMTP id 4NRvBy3lkhz9yF8q; Wed, 7 Dec 2022 18:48:10 +0800 (CST) Received: from huaweicloud.com (unknown [10.204.63.22]) by APP2 (Coremail) with SMTP id GxC2BwAnDvrycJBjWe_HAA--.20736S2; Wed, 07 Dec 2022 11:54:53 +0100 (CET) From: Roberto Sassu To: dhowells@redhat.com, herbert@gondor.apana.org.au, davem@davemloft.net Cc: zohar@linux.ibm.com, dmitry.kasatkin@gmail.com, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, ebiggers@kernel.org, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Roberto Sassu Subject: [PATCH] public_key: Add a comment to public_key_signature struct definition Date: Wed, 7 Dec 2022 11:54:30 +0100 Message-Id: <20221207105430.248613-1-roberto.sassu@huaweicloud.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: GxC2BwAnDvrycJBjWe_HAA--.20736S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Cw4xJw4DCw4rKr4rXF13urg_yoW8GF4UpF s3Gr1rKryjgrn3AFs7C3WfC34rGa1UCr17Ww4DZ3y3uanxXw1kCw4Ika13W3Z5XrWkXay7 ArZFgw1Yvw15Z3DanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUk2b4IE77IF4wAFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4 vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xIIjxv20xvEc7Cj xVAFwI0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIEc7CjxV AFwI0_Gr0_Gr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40E x7xfMcIj6xIIjxv20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x 0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1l42xK82IY c2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s 026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF 0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0x vE42xK8VAvwI8IcIk0rVWrJr0_WFyUJwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E 87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxUOyCJDUUUU X-CM-SenderInfo: purev21wro2thvvxqx5xdzvxpfor3voofrz/1tbiAgATBF1jj4Jj+AACs- X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org From: Roberto Sassu public_key_verify_signature() calls sg_set_buf() to set the signature and digest for the signature verification. As sg_set_buf() requires the buffer to be in physically contiguous memory, see commit ac4e97abce9b8 ("scatterlist: sg_set_buf() argument must be in linear mapping"), mention that in a comment for the signature and digest fields of the public_key_signature structure. Link: https://lore.kernel.org/linux-integrity/Y4pIpxbjBdajymBJ@sol.localdomain/ Suggested-by: Eric Biggers Signed-off-by: Roberto Sassu Reviewed-by: Paul Moore --- include/crypto/public_key.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h index 68f7aa2a7e55..6d623e063034 100644 --- a/include/crypto/public_key.h +++ b/include/crypto/public_key.h @@ -37,8 +37,8 @@ extern void public_key_free(struct public_key *key); */ struct public_key_signature { struct asymmetric_key_id *auth_ids[3]; - u8 *s; /* Signature */ - u8 *digest; + u8 *s; /* Signature (in physically contiguous mem) */ + u8 *digest; /* Digest (in physically contiguous mem) */ u32 s_size; /* Number of bytes in signature */ u32 digest_size; /* Number of bytes in digest */ const char *pkey_algo;