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=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 F156DCA9EAF for ; Thu, 24 Oct 2019 22:52:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C45D621929 for ; Thu, 24 Oct 2019 22:52:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="h7CmDroH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732458AbfJXWwN (ORCPT ); Thu, 24 Oct 2019 18:52:13 -0400 Received: from mail-qk1-f202.google.com ([209.85.222.202]:51811 "EHLO mail-qk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732326AbfJXWwL (ORCPT ); Thu, 24 Oct 2019 18:52:11 -0400 Received: by mail-qk1-f202.google.com with SMTP id h4so347748qkd.18 for ; Thu, 24 Oct 2019 15:52:10 -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=mYL9Vajfp90RBhmOr5x+royOTK5ijTSQrnKKnKdSwP8=; b=h7CmDroHNc2GUxa+g8sWKLD1CcV9gP1uFZesaZzVHnU2a/VBAGDrWFnqCRU+m5Vbxp eaGC73Zpw9RZWybSnsktpUOkuEDcpbZIwlHpDgN79dPEQKA6imXqfphOHV6fZIX1vhay UCpiNG3JtiEVtrMytjk/nHqhnqy0gmdjuwm2NOkx0ncwhVH/+Zpkk8+VEcnFqvyBPvs2 m5wks6dUtk7GMFS4ou0w6XEB2b6UOzqqnC4RoG6rt3wfmnkP2N6JtRALXiO9ySr4Fq8U CorUFaTzeYq9F1zwhAtdXHWC+48gHjKj20BQ918yQIZSbJoZWQzd8WGDJiFqjX+ZtINR p1BA== 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=mYL9Vajfp90RBhmOr5x+royOTK5ijTSQrnKKnKdSwP8=; b=KqFAaLOmgmlsDjjvIAqk+kd8HhCNcVVxPYxqjKMlq2tlpwsMWSxhChz1KDYm7THFOM VhCnedBQ6o+39RUKqBi7VuCCiy7ULh/oNl+oAyb36OVWKUXQop3KRoM8ylaaaCvvJass MpXlv7PmAHi1ENFo7ACsqFlsbcezNfRt3tUbH9q9WY7eIw/AU3MbvQTvuSbo4eyviuVk vcD4h0VGzU6BbpbhuSxefxOHSQKGctV49cQm/2IBnL0twNFjuwJwCFHl5oveuy4Uc9Jl mnRvESdzvMgNZB9zTzFdoc12S3Ee9/gKlxojHblgnKM7Vwcp7+xrZ7mAq/GJBl++MZmK zP9A== X-Gm-Message-State: APjAAAUCafAK/UUngXTjGr5uyFkuKPNFw75LVBkZFclFQs0uvoRlZpvp AHsd5661Rs0yH/P0cp3/ldFB7YJjNF4r71kJMOo= X-Google-Smtp-Source: APXvYqyjPZYDLgJTlGq99OGbhTAPtQvVAb9tamVCQRwQTsZBBJQIlLhZeafbs0GYaiDEFKiGX8NWZ+1DbuMz+1REocU= X-Received: by 2002:ae9:e885:: with SMTP id a127mr114159qkg.427.1571957529972; Thu, 24 Oct 2019 15:52:09 -0700 (PDT) Date: Thu, 24 Oct 2019 15:51:24 -0700 In-Reply-To: <20191024225132.13410-1-samitolvanen@google.com> Message-Id: <20191024225132.13410-10-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191024225132.13410-1-samitolvanen@google.com> X-Mailer: git-send-email 2.24.0.rc0.303.g954a862665-goog Subject: [PATCH v2 09/17] arm64: disable function graph tracing with SCS From: samitolvanen@google.com To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel Cc: Dave Martin , Kees Cook , Laura Abbott , Mark Rutland , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With CONFIG_FUNCTION_GRAPH_TRACER, function return addresses are modified in ftrace_graph_caller and prepare_ftrace_return to redirect control flow to ftrace_return_to_handler. This is incompatible with SCS. Signed-off-by: Sami Tolvanen --- arch/arm64/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 3f047afb982c..8cda176dad9a 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -148,7 +148,7 @@ config ARM64 select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_ERROR_INJECTION - select HAVE_FUNCTION_GRAPH_TRACER + select HAVE_FUNCTION_GRAPH_TRACER if !SHADOW_CALL_STACK select HAVE_GCC_PLUGINS select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_IRQ_TIME_ACCOUNTING -- 2.24.0.rc0.303.g954a862665-goog