Message ID | 20250314-v5_user_cfi_series-v12-25-e51202b53138@rivosinc.com (mailing list archive) |
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State | New |
Headers | show
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Fri, 14 Mar 2025 14:40:33 -0700 (PDT) From: Deepak Gupta <debug@rivosinc.com> Date: Fri, 14 Mar 2025 14:39:44 -0700 Subject: [PATCH v12 25/28] riscv: create a config for shadow stack and landing pad instr support MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250314-v5_user_cfi_series-v12-25-e51202b53138@rivosinc.com> References: <20250314-v5_user_cfi_series-v12-0-e51202b53138@rivosinc.com> In-Reply-To: <20250314-v5_user_cfi_series-v12-0-e51202b53138@rivosinc.com> To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>, Andrew Morton <akpm@linux-foundation.org>, "Liam R. Howlett" <Liam.Howlett@oracle.com>, Vlastimil Babka <vbabka@suse.cz>, Lorenzo Stoakes <lorenzo.stoakes@oracle.com>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Conor Dooley <conor@kernel.org>, Rob Herring <robh@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Christian Brauner <brauner@kernel.org>, Peter Zijlstra <peterz@infradead.org>, Oleg Nesterov <oleg@redhat.com>, Eric Biederman <ebiederm@xmission.com>, Kees Cook <kees@kernel.org>, Jonathan Corbet <corbet@lwn.net>, Shuah Khan <shuah@kernel.org>, Jann Horn <jannh@google.com>, Conor Dooley <conor+dt@kernel.org> Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, alistair.francis@wdc.com, richard.henderson@linaro.org, jim.shu@sifive.com, andybnac@gmail.com, kito.cheng@sifive.com, charlie@rivosinc.com, atishp@rivosinc.com, evan@rivosinc.com, cleger@rivosinc.com, alexghiti@rivosinc.com, samitolvanen@google.com, broonie@kernel.org, rick.p.edgecombe@intel.com, Zong Li <zong.li@sifive.com>, Deepak Gupta <debug@rivosinc.com> X-Mailer: b4 0.14.0 X-Rspam-User: X-Rspamd-Queue-Id: C770914000B X-Rspamd-Server: rspam08 X-Stat-Signature: cq7ufwa3ygtpw4tsm7xjydjjmqqahyu3 X-HE-Tag: 1741988434-245515 X-HE-Meta: U2FsdGVkX1/8y2ka2vvcLds9RHzSAtHcxh/97rG4E5cToeZNINVLNEtj3HUelRosgEa4zzAVyO3JLIWW7E6pNB9dX/Y0SlTDSUN9EKj0nKTqPBhL5OfLCpY52ulk6cvjU7ArKyfA45p12vtdA0kyDugrPItg015ruJJUOdSOgMDmYJ4oC5bu/MbOLYbKidfABQtOE9Rk9jsKSl74nCdsNrHmqpOaH8wN8znFHigH0mNSE5qGD1Fi/Kt6wOFO6Fbk0L8k6i9YNnh3Fw8G6Ar957i5nPeYGKp7xBbAwi7IM50VQW2deSEKihn8g6WeIuAjSL0N7W3YlJRGqIc7W5fPZ25jfPEhgpC7V7s+SVsWCR85QZZucvaBFRD8WGNGz4cGg/Oi5UUJc2hEik4jErP3jp5p/VxQpIj1mlvBd4cAy+wuD1F0s6uhI/NbPweumU8l9eDOHAAWyfTU+ib3XlWk/EgvFV/Yqk6opdc5/nzq92rZLGbzRj9tVgRHj/pIxmZ0pSVXdjNh4TRrRanmv2wlXtkr4QuhHF35dVHplIRie8WQxmlKuGiAtHl2aa92IqHv86dB6Yp1wWRXiZNyTdpaVK0Rm25+Wcbd8ofOK/TPnobxy2J0w2Wo6OrI1A+iw/L41Wu7lxpL4Qz+VagLKB8GhReIupZUyotPyNvOFf3Pq4EmU+xFegoTWo8wjJ8dYPBKe4bHCL+IzUaFbbG3nppgbeSajdIB6h6K9Rdmo/g1p8oRb3HtEk1Hp9uPJ47s4H7UnmBQ28Q8aad30BtI3H23qF8KuoESx5j8piAP/nr7tcZU0Fw2Rp/hKFyy4NY9bgw5hApST/2go7ITbgcLm7E6HwkCWx6ewCtT/V1LjdYFGUggLcQAf27PcKQMDs2dLiJVVUuoMA01BiM7VepXlehgHvKeS7LjCUm3v0X+7rpfPv/glGph0FoXeQIiuZZ7Ri0ftur0ka7M1QkcOcpS/aC SurK02Y7 3kf+HPyjOwt1D7dvLiXOUW2DWRsfoddPxVFKHFYBjdKbmwus876hVRItn+v6tY5eBp5XMQAlkKormyGHgnu32eHSRxSh+e1NXnHj6+4ILniYktNA= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000045, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> List-Subscribe: <mailto:majordomo@kvack.org> List-Unsubscribe: <mailto:majordomo@kvack.org> |
Series |
riscv control-flow integrity for usermode
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expand
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diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 7612c52e9b1e..0a2e50f056e8 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -250,6 +250,26 @@ config ARCH_HAS_BROKEN_DWARF5 # https://github.com/llvm/llvm-project/commit/7ffabb61a5569444b5ac9322e22e5471cc5e4a77 depends on LD_IS_LLD && LLD_VERSION < 180000 +config RISCV_USER_CFI + def_bool y + bool "riscv userspace control flow integrity" + depends on 64BIT && $(cc-option,-mabi=lp64 -march=rv64ima_zicfiss) + depends on RISCV_ALTERNATIVE + select ARCH_HAS_USER_SHADOW_STACK + select ARCH_USES_HIGH_VMA_FLAGS + select DYNAMIC_SIGFRAME + help + Provides CPU assisted control flow integrity to userspace tasks. + Control flow integrity is provided by implementing shadow stack for + backward edge and indirect branch tracking for forward edge in program. + Shadow stack protection is a hardware feature that detects function + return address corruption. This helps mitigate ROP attacks. + Indirect branch tracking enforces that all indirect branches must land + on a landing pad instruction else CPU will fault. This mitigates against + JOP / COP attacks. Applications must be enabled to use it, and old user- + space does not get protection "for free". + default y + config ARCH_MMAP_RND_BITS_MIN default 18 if 64BIT default 8