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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=s5XAabWLI2BrMJh1ovnuwgRiP/5q7kOCrh3Tv97TlA0=; b=N4in53FF9dHO600aCGoL7Ifz/WeCFFJn5PAmaOe//0BgLSCLSFd1Bt6Cdo4QI9mfb3 Ay+2JKiwYh4QmQ5WLuuwiaJljTic72/Vn2GKGGAIwtwMT6PA6Yw07zscexE4e52zMlZf sQguyYxD7NeGRyy59IVobzoyZeEfUXUWGXL36sgXrqbLa7waGp9LkfcHxHUeFXj4Lt9T Hvrfbb9MsS763CvPPZ9uzP8Fa8BF4JH+weva3iSFUGQMuUjvVX1NK0YAsUPKLRm0RGUL RViA5aCEgw9C3KXpb8uEZV02oIGPSKVVXk3qaNvVASqwxYQMlix6G1Mk+ypuzGCv31gc fTvg== X-Gm-Message-State: AGi0PubyEWU6dZ3Rx8t7+boJKSDdmKZBuJZannYO+TJSe20R67bjeE6J g0vKLjOuWQx+5qht8woGky/S3VnlRikxYK2reH4= X-Google-Smtp-Source: APiQypIC7qXsP5qbhdeCuYbEm/RDRXHOxeiSr4jdV4m9YjAk4hfpiSrYO6gGIVT/CP156YV9CFT4O6s/Zh/4ptwP/o4= X-Received: by 2002:a25:abed:: with SMTP id v100mr3797424ybi.96.1588003251771; Mon, 27 Apr 2020 09:00:51 -0700 (PDT) Date: Mon, 27 Apr 2020 09:00:14 -0700 In-Reply-To: <20200427160018.243569-1-samitolvanen@google.com> Message-Id: <20200427160018.243569-9-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200427160018.243569-1-samitolvanen@google.com> X-Mailer: git-send-email 2.26.2.303.gf8c07b1a785-goog Subject: [PATCH v13 08/12] arm64: vdso: disable Shadow Call Stack From: Sami Tolvanen To: Will Deacon , Catalin Marinas , James Morse , Steven Rostedt , Ard Biesheuvel , Mark Rutland , Masahiro Yamada , Michal Marek , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200427_090055_619072_1F0BB866 X-CRM114-Status: GOOD ( 10.66 ) X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:b4a listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_MED DKIMwl.org - Medium sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Jann Horn , Marc Zyngier , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, Miguel Ojeda , Masami Hiramatsu , Sami Tolvanen , clang-built-linux@googlegroups.com, Laura Abbott , Dave Martin , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Shadow stacks are only available in the kernel, so disable SCS instrumentation for the vDSO. Signed-off-by: Sami Tolvanen Reviewed-by: Nick Desaulniers Reviewed-by: Kees Cook Reviewed-by: Mark Rutland Acked-by: Will Deacon --- arch/arm64/kernel/vdso/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index dd2514bb1511..a87a4f11724e 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -25,7 +25,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING VDSO_LDFLAGS := -Bsymbolic -CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os +CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) KBUILD_CFLAGS += $(DISABLE_LTO) KASAN_SANITIZE := n UBSAN_SANITIZE := n