[15/18] arm64: vdso: disable Shadow Call Stack

Message ID	20191018161033.261971-16-samitolvanen@google.com (mailing list archive)
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Headers	show Return-Path: <SRS0=LC8D=YL=lists.infradead.org=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 943FE21D7C Date: Fri, 18 Oct 2019 09:10:30 -0700 In-Reply-To: <20191018161033.261971-1-samitolvanen@google.com> Message-Id: <20191018161033.261971-16-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> Subject: [PATCH 15/18] arm64: vdso: disable Shadow Call Stack From: Sami Tolvanen <samitolvanen@google.com> To: Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Steven Rostedt <rostedt@goodmis.org>, Ard Biesheuvel <ard.biesheuvel@linaro.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:f8b0:4864:20:0:0:0:54a listed in] [list.dnswl.org] -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's 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 Precedence: list Cc: Mark Rutland <mark.rutland@arm.com>, Kees Cook <keescook@chromium.org>, kernel-hardening@lists.openwall.com, Nick Desaulniers <ndesaulniers@google.com>, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen <samitolvanen@google.com>, Laura Abbott <labbott@redhat.com>, Dave Martin <Dave.Martin@arm.com>, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org
Series	add support for Clang's Shadow Call Stack \| expand [00/18] add support for Clang's Shadow Call Stack [01/18] arm64: mm: don't use x18 in idmap_kpti_install_ng_mappings [02/18] arm64/lib: copy_page: avoid x18 register in assembler code [03/18] arm64: kvm: stop treating register x18 as caller save [04/18] arm64: kernel: avoid x18 as an arbitrary temp register [05/18] arm64: kbuild: reserve reg x18 from general allocation by the compiler [06/18] add support for Clang's Shadow Call Stack (SCS) [07/18] scs: add accounting [08/18] scs: add support for stack usage debugging [09/18] trace: disable function graph tracing with SCS [10/18] kprobes: fix compilation without CONFIG_KRETPROBES [11/18] kprobes: disable kretprobes with SCS [12/18] arm64: reserve x18 only with Shadow Call Stack [13/18] arm64: preserve x18 when CPU is suspended [14/18] arm64: efi: restore x18 if it was corrupted [15/18] arm64: vdso: disable Shadow Call Stack [16/18] arm64: kprobes: fix kprobes without CONFIG_KRETPROBES [17/18] arm64: disable SCS for hypervisor code [18/18] arm64: implement Shadow Call Stack

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20191018161033.261971-16-samitolvanen@google.com (mailing list archive)

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Subject: [PATCH 15/18] arm64: vdso: disable Shadow Call Stack
From: Sami Tolvanen <samitolvanen@google.com>
To: Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>,
 Steven Rostedt <rostedt@goodmis.org>,
 Ard Biesheuvel <ard.biesheuvel@linaro.org>
Precedence: list
Cc: Mark Rutland <mark.rutland@arm.com>, Kees Cook <keescook@chromium.org>,
 kernel-hardening@lists.openwall.com,
 Nick Desaulniers <ndesaulniers@google.com>, linux-kernel@vger.kernel.org,
 clang-built-linux@googlegroups.com, Sami Tolvanen <samitolvanen@google.com>,
 Laura Abbott <labbott@redhat.com>, Dave Martin <Dave.Martin@arm.com>,
 linux-arm-kernel@lists.infradead.org
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Series

add support for Clang's Shadow Call Stack | expand

Commit Message

Sami Tolvanen Oct. 18, 2019, 4:10 p.m. UTC

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
---
 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..b23c963dd8df 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -19,7 +19,7 @@  obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
 
 ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 --hash-style=sysv \
 		--build-id -n -T
-
+ccflags-y += $(DISABLE_SCS)
 ccflags-y := -fno-common -fno-builtin -fno-stack-protector -ffixed-x18
 ccflags-y += -DDISABLE_BRANCH_PROFILING

[15/18] arm64: vdso: disable Shadow Call Stack

Commit Message

Patch