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 626F1CA9ECB for ; Thu, 31 Oct 2019 16:47:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 36C27217D9 for ; Thu, 31 Oct 2019 16:47:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="MFB8Vi7T" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728967AbfJaQrN (ORCPT ); Thu, 31 Oct 2019 12:47:13 -0400 Received: from mail-pl1-f201.google.com ([209.85.214.201]:36508 "EHLO mail-pl1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728913AbfJaQrL (ORCPT ); Thu, 31 Oct 2019 12:47:11 -0400 Received: by mail-pl1-f201.google.com with SMTP id g2so2479295plq.3 for ; Thu, 31 Oct 2019 09:47:11 -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=9Ao7uN2sNi3wFwgEShB4rOY2NPtO1ve2nhewvDVkd70=; b=MFB8Vi7TeDoI2FwYG6EbbYc+LBTOUEvRqAUAKVWlm/Y9wlKU7ujBC6awj8P8GgNg15 SHrqse6Eby/JmzTas4YOpEbcYfE5zV02IRVEzTRd+/8pcGMuY5LmXsc1LvTsYyOPQRbj rWB9hKuYdsKAq5u+1gwPKMLhd3aFBv9y7s34IJD7qUWZFLaH/dCyw0RXobVGkHrXVve3 OIoYdwBvTIcedJKnwnczA/JcOUoSjLk5Niw2NS8hRSGXfbcB1RQzOd3+hhaLOuVMzDiz eb9NXbVSx5Tc5HE4+fuT64N6mKP3gK4YOR6cATCVdP01/rojf3F/IcVEmTxc2qVknVy3 MHuw== 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=9Ao7uN2sNi3wFwgEShB4rOY2NPtO1ve2nhewvDVkd70=; b=l4j9X8ZtlWhBWrre0ytx+N1VlfUKyIIotlwlmucwpMiOTwXAyPo7S+I29aa61/ZtRy NNsbvalsLG5mlRtPM6qmb6bgKYFpd3K/2KHzRkqr5POPMPMLoXhKp6K6Msuq/UEqGLMN lMXgxy3Cyy6ie57H+AcUUn0chjJhA39jc8UQc1Ou4q6zEisQHIpuJSAwjrFTiBDzHIr8 mfr21IZinoHdMpPsS1VY2qBP5z16a6Gb5xVDEvCwh8JvEBLGw6BcPrUjm1/D6q1VN02B PJFFN60or3RyeUiXE1BLbfubEH1yVubRvE6TpNFNkigscKA+dyBC8x5fq6m2ba5MPOAv WCFA== X-Gm-Message-State: APjAAAXJLM1f0iLrOsnCUeJAGaU/S8iVdDjZtnzAmW5l0gOXk8Q14XjY ATg8MxiIVPdDbQ6+eGcJpZPpIPEc4QoGkPqqGoU= X-Google-Smtp-Source: APXvYqyTGY27y+fXLM2c6y9Il6TlGdGiGRpFxeY59Reh3sr0g68TeqvBad+M0W7yvXKqIy6D21VCf66mb2yA9rq9620= X-Received: by 2002:a63:d258:: with SMTP id t24mr7711243pgi.289.1572540430252; Thu, 31 Oct 2019 09:47:10 -0700 (PDT) Date: Thu, 31 Oct 2019 09:46:30 -0700 In-Reply-To: <20191031164637.48901-1-samitolvanen@google.com> Message-Id: <20191031164637.48901-11-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191031164637.48901-1-samitolvanen@google.com> X-Mailer: git-send-email 2.24.0.rc0.303.g954a862665-goog Subject: [PATCH v3 10/17] arm64: disable kretprobes 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_KRETPROBES, function return addresses are modified to redirect control flow to kretprobe_trampoline. 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..e7b57a8a5531 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -165,7 +165,7 @@ config ARM64 select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS select HAVE_KPROBES - select HAVE_KRETPROBES + select HAVE_KRETPROBES if !SHADOW_CALL_STACK select HAVE_GENERIC_VDSO select IOMMU_DMA if IOMMU_SUPPORT select IRQ_DOMAIN -- 2.24.0.rc0.303.g954a862665-goog