From 282a181b1a0d66de1f0894d82f395fcd478f51d1 Mon Sep 17 00:00:00 2001 From: YiFei Zhu Date: Thu, 24 Sep 2020 07:44:16 -0500 Subject: seccomp: Move config option SECCOMP to arch/Kconfig In order to make adding configurable features into seccomp easier, it's better to have the options at one single location, considering especially that the bulk of seccomp code is arch-independent. An quick look also show that many SECCOMP descriptions are outdated; they talk about /proc rather than prctl. As a result of moving the config option and keeping it default on, architectures arm, arm64, csky, riscv, sh, and xtensa did not have SECCOMP on by default prior to this and SECCOMP will be default in this change. Architectures microblaze, mips, powerpc, s390, sh, and sparc have an outdated depend on PROC_FS and this dependency is removed in this change. Suggested-by: Jann Horn Link: https://lore.kernel.org/lkml/CAG48ez1YWz9cnp08UZgeieYRhHdqh-ch7aNwc4JRBnGyrmgfMg@mail.gmail.com/ Signed-off-by: YiFei Zhu [kees: added HAVE_ARCH_SECCOMP help text, tweaked wording] Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/9ede6ef35c847e58d61e476c6a39540520066613.1600951211.git.yifeifz2@illinois.edu --- arch/um/Kconfig | 16 ---------------- 1 file changed, 16 deletions(-) (limited to 'arch/um') diff --git a/arch/um/Kconfig b/arch/um/Kconfig index eb51fec75948..d49f471b02e3 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -173,22 +173,6 @@ config PGTABLE_LEVELS default 3 if 3_LEVEL_PGTABLES default 2 -config SECCOMP - def_bool y - prompt "Enable seccomp to safely compute untrusted bytecode" - help - This kernel feature is useful for number crunching applications - that may need to compute untrusted bytecode during their - execution. By using pipes or other transports made available to - the process as file descriptors supporting the read/write - syscalls, it's possible to isolate those applications in - their own address space using seccomp. Once seccomp is - enabled via prctl(PR_SET_SECCOMP), it cannot be disabled - and the task is only allowed to execute a few safe syscalls - defined by each seccomp mode. - - If unsure, say Y. - config UML_TIME_TRAVEL_SUPPORT bool prompt "Support time-travel mode (e.g. for test execution)" -- cgit