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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=R+pagykxtiUayWbEADuJoiydRcDW6HSTgqXK05LN0/E=; b=ECqI0ebYmCTCe2rHdjOHhrMH5jR2N8affAPc1uUuMgBtyYk8D3nD7FPqHK6hAaFDLP KFvZUAXclk2m3PfP4Nmhlvvxlh73CfJT8GrzCwPTM7T7BcoifRfzR5e90ZoE7C0kJmU5 2ie25xJMAEWEYsUbNH0xNcs4syPeokCpTUg/Xmi9/rOOIhOA3SVWInEs8OV2bSBJfR7K ai8aHjReC/HVmXcW5ldtIe1gHxkgyXmUfPpb0DUTmaoZ1gGxXEpuWnGUxr1bU1SeeJOy 2Fo/bGWdELq8FQQkzEbCcSEZB0FPc73IQ4rAqqBnKoJOcUHrS3rwP3XHz9JaH/dZk+O1 /4kg== X-Gm-Message-State: APjAAAXjTefrihlME0ZDjT5TpBzL5OtzNzCN7HhYxpN56DZh3xcqYq57 CPmGiy7clLnggR8VGwa0LWPId/NxBOXTW3OzaFA= X-Google-Smtp-Source: APXvYqxu3PYbJO97f2mzp9DNQTcnJCAUNKZZIOqlBzTc4OuUnzwTI3m0AgfuJaiQwAi1b2GOeoccGn5nuZqvAM1i7Q0= X-Received: by 2002:a25:cc87:: with SMTP id l129mr704884ybf.48.1571957534881; Thu, 24 Oct 2019 15:52:14 -0700 (PDT) Date: Thu, 24 Oct 2019 15:51:25 -0700 In-Reply-To: <20191024225132.13410-1-samitolvanen@google.com> Message-Id: <20191024225132.13410-11-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 10/17] arm64: disable kretprobes with SCS From: samitolvanen@google.com To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191024_155217_388432_E3BFE41E X-CRM114-Status: GOOD ( 11.18 ) X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.2 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:b49 listed in] [list.dnswl.org] -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 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -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 -0.0 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: Mark Rutland , Kees Cook , Jann Horn , Masahiro Yamada , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, Miguel Ojeda , clang-built-linux@googlegroups.com, Sami Tolvanen , 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 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 8cda176dad9a..42867174920f 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