From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 338B4C433ED for ; Thu, 1 Apr 2021 23:42:35 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4F91D61106 for ; Thu, 1 Apr 2021 23:42:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4F91D61106 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Cc:To:From:Subject:References:Mime-Version: Message-Id:In-Reply-To:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kYh9JNhzg4/qaeioDtC0jLU1ur5nL9nQeYQT0Gm8cQc=; b=VHcw0GegPbtgWQ +QFpW26yA5rXQYO+kBsjalASgu3y6ZN0373ivD1ZauIxsqguO1I9QBMMZaAcWAvQQzslgsYoc7gD9 aIT9BzLRPgTmW4Mh0zhmh8w5jgrWL+fLLE0u60iTJC7LmKt2Y5qQbpb25GyRzZGfBKicBOWD7tS6g T7EUfU+zAgzT+6rLtiF/ZoLhJciJGnukPJNboSGloz4tDK/vgF+ig5KTRhgwgoPIGbV39XZRr3v2L qIZ8F2369wzPCjcIU2c2JV5ZjhCRI8IVWfgmQUbupIWNxuQI/mG1xPS7lQvEzfaQSxwWMEhQSoJxA rmuzZrLuIAYCGIwGm/0Q==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lS6sa-00BNr3-KU; Thu, 01 Apr 2021 23:37:37 +0000 Received: from mail-pg1-x549.google.com ([2607:f8b0:4864:20::549]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lS6o1-00BM63-PN for linux-arm-kernel@lists.infradead.org; Thu, 01 Apr 2021 23:32:56 +0000 Received: by mail-pg1-x549.google.com with SMTP id b17so4070816pgh.17 for ; Thu, 01 Apr 2021 16:32:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=UnGCKexXdTyI7Eiqrpiu9/A3gEqTseA/WgHOqsa1uKs=; b=Y6zfeKMJZ/0smJ+JE3FMI+/MMd/ZXHcogVJQP02BVRavDHQc2Edoxb8O9UMVaoGWhY 9M7E77BUjYKqGqhxNg2Ko45u1WpKF8gpGXMiV7k/Tc1x//nVTn29FLsuyQQgeT3V8din SROVjqBNbPfeHTigsIDGDSOViR6QN9BzqkYAwyvaBD4SA5L9n9oHfj14K7uLGlt9J08o mKGxub1wSpYG2Y+5GS3JqQ4O0M0C5WJF9Q77BaDZaElF6rrR+h+xp7Ff9VOWJ+6vYTF6 /Wx+GGqcw4dH75WEKap9ddzI2quiNytHhOyUqj2yLAD5J+cNXqEslF8JyxBMuvId9p8q rGNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=UnGCKexXdTyI7Eiqrpiu9/A3gEqTseA/WgHOqsa1uKs=; b=Z25P08X/e9+7yj291cmsrfcI7e/EUI/P2ufI9nslIfhOrOPXSifMeDJCQQAavagNaB BK6AB6QxNKjmkKYwmuvt39U48YlB0+86lWS99QDBJD2x6Ed0q5hReG2y1yVuEQyLgLvw 81AlzG7L9vNXp7zlboIZ0Vc+4Ufz8iEDPM/OzjdmrUbGqEfwb51aFsHNUWGbOn/6Uro6 T643fIiZSEmGxgBhn+AuG5TKwYwdGxfxA6eQOXOtCX69w92YE9KPE1+rtMuLOZfm/VKX J7KvW03qv7rgS6aqVYwAc71rmb1D83uUoNFW6/d9meUeAP4HDOwHt5NuGRqJDHg4nGCk qcgw== X-Gm-Message-State: AOAM5317ySWWWvkMcJo8gEzv1N0ANr4dALkZqSfKSm06iueRaksLKUNn ZpLpBGZh9Ys6zBdz13jH+NS66GZUBxglBOblp7E= X-Google-Smtp-Source: ABdhPJyBRWK1tySqgHsv5VTyvnh7AhzpICkyfxDBUbSBurGBw1+GMJMgKtJy/KlOFY96rLBaJQLLx0AfoI3De6kZmhg= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:4cd1:da86:e91b:70b4]) (user=samitolvanen job=sendgmr) by 2002:a62:e805:0:b029:1f8:16ba:4518 with SMTP id c5-20020a62e8050000b02901f816ba4518mr9437095pfi.37.1617319970406; Thu, 01 Apr 2021 16:32:50 -0700 (PDT) Date: Thu, 1 Apr 2021 16:32:13 -0700 In-Reply-To: <20210401233216.2540591-1-samitolvanen@google.com> Message-Id: <20210401233216.2540591-16-samitolvanen@google.com> Mime-Version: 1.0 References: <20210401233216.2540591-1-samitolvanen@google.com> X-Mailer: git-send-email 2.31.0.208.g409f899ff0-goog Subject: [PATCH v5 15/18] arm64: add __nocfi to __apply_alternatives From: Sami Tolvanen To: Kees Cook Cc: Nathan Chancellor , Nick Desaulniers , Masahiro Yamada , Will Deacon , Jessica Yu , Arnd Bergmann , Tejun Heo , "Paul E. McKenney" , Christoph Hellwig , Peter Zijlstra , Sedat Dilek , Mark Rutland , Catalin Marinas , bpf@vger.kernel.org, linux-hardening@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210402_003254_590560_19D03F92 X-CRM114-Status: GOOD ( 14.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org __apply_alternatives makes indirect calls to functions whose address is taken in assembly code using the alternative_cb macro. With non-canonical CFI, the compiler won't replace these function references with the jump table addresses, which trips CFI. Disable CFI checking in the function to work around the issue. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- arch/arm64/kernel/alternative.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/alternative.c b/arch/arm64/kernel/alternative.c index 1184c44ea2c7..abc84636af07 100644 --- a/arch/arm64/kernel/alternative.c +++ b/arch/arm64/kernel/alternative.c @@ -133,8 +133,8 @@ static void clean_dcache_range_nopatch(u64 start, u64 end) } while (cur += d_size, cur < end); } -static void __apply_alternatives(void *alt_region, bool is_module, - unsigned long *feature_mask) +static void __nocfi __apply_alternatives(void *alt_region, bool is_module, + unsigned long *feature_mask) { struct alt_instr *alt; struct alt_region *region = alt_region; -- 2.31.0.208.g409f899ff0-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel