linux-kernel - [PATCH 1/2] arm64: Enable seccomp architecture tracking

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Date:   Tue, 27 Oct 2020 17:19:59 -0700
From:   Kees Cook <keescook@...omium.org>
To:     YiFei Zhu <yifeifz2@...inois.edu>
Cc:     Kees Cook <keescook@...omium.org>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Andy Lutomirski <luto@...capital.net>,
        Will Drewry <wad@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] arm64: Enable seccomp architecture tracking

To enable seccomp constant action bitmaps, we need to have a static
mapping to the audit architecture and system call table size. Add these
for arm64.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 arch/arm64/include/asm/seccomp.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/include/asm/seccomp.h b/arch/arm64/include/asm/seccomp.h
index c36387170936..40f325e7a404 100644
--- a/arch/arm64/include/asm/seccomp.h
+++ b/arch/arm64/include/asm/seccomp.h
@@ -19,4 +19,19 @@
 
 #include <asm-generic/seccomp.h>
 
+#ifdef CONFIG_ARM64
+# define SECCOMP_ARCH_NATIVE		AUDIT_ARCH_AARCH64
+# define SECCOMP_ARCH_NATIVE_NR		NR_syscalls
+# define SECCOMP_ARCH_NATIVE_NAME	"arm64"
+# ifdef CONFIG_COMPAT
+#  define SECCOMP_ARCH_COMPAT		AUDIT_ARCH_ARM
+#  define SECCOMP_ARCH_COMPAT_NR	__NR_compat_syscalls
+#  define SECCOMP_ARCH_COMPAT_NAME	"arm"
+# endif
+#else /* !CONFIG_ARM64 */
+# define SECCOMP_ARCH_NATIVE		AUDIT_ARCH_ARM
+# define SECCOMP_ARCH_NATIVE_NR		NR_syscalls
+# define SECCOMP_ARCH_NATIVE_NAME	"arm"
+#endif
+
 #endif /* _ASM_SECCOMP_H */
-- 
2.25.1