[openwrt/openwrt] buildsystem: add CONFIG_SECCOMP

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/b118efa0d25f5b60226a9d316eb838dd6be22f78

commit b118efa0d25f5b60226a9d316eb838dd6be22f78
Author: Florian Eckert <fe at dev.tdt.de>
AuthorDate: Fri Oct 15 09:19:12 2021 +0200

    buildsystem: add CONFIG_SECCOMP
    
    Until now, this feature was switched on via the kernel configuration
    option KERNEL_SECCOMP.
    
    The follwing change a7f794cd2aa104fdbd4c6e38f9b76373bf9b96e1 now requires that
    the package procd-seccomp must also enabled for buildinmg.
    
    However, this is not the case we have no dependency and the imagebuilder
    cannot build the image, because of the implicit package selection.
    
    This change adds a new configuration option CONFIG_SECCOMP.
    The new option  has the same behaviour as the configuration
    option CONFIG_SELINUX.
    
    If the CONFIG_SECCOMP is selected then the package procd-seccomp and
    KERNEL_SECCOMP is enabled for this build.
    
    Signed-off-by: Florian Eckert <fe at dev.tdt.de>
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 config/Config-build.in        | 12 ++++++++++++
 include/target.mk             |  2 +-
 package/system/procd/Makefile |  3 +--
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/config/Config-build.in b/config/Config-build.in
index f0e1aaa695..ca6f513450 100644
--- a/config/Config-build.in
+++ b/config/Config-build.in
@@ -386,4 +386,16 @@ menu "Global build settings"
 
 	endchoice
 
+	config SECCOMP
+		bool "Enable SECCOMP"
+		select KERNEL_SECCOMP
+		select PACKAGE_procd-seccomp
+		depends on (aarch64 || arm || armeb || mips || mipsel || i386 || powerpc || x86_64)
+		depends on !TARGET_uml
+		default y
+		help
+		  This option enables seccomp kernel features to safely
+		  execute untrusted bytecode and selects the seccomp-variants
+		  of procd
+
 endmenu
diff --git a/include/target.mk b/include/target.mk
index 03192d3ebe..60760bf602 100644
--- a/include/target.mk
+++ b/include/target.mk
@@ -39,7 +39,7 @@ DEFAULT_PACKAGES+=procd-ujail
 endif
 
 # include seccomp ld-preload hooks if kernel supports it
-ifneq ($(CONFIG_KERNEL_SECCOMP),)
+ifneq ($(CONFIG_SECCOMP),)
 DEFAULT_PACKAGES+=procd-seccomp
 endif
 
diff --git a/package/system/procd/Makefile b/package/system/procd/Makefile
index 6f506423f8..4c76045062 100644
--- a/package/system/procd/Makefile
+++ b/package/system/procd/Makefile
@@ -82,8 +82,7 @@ endef
 define Package/procd-seccomp
   SECTION:=base
   CATEGORY:=Base system
-  DEPENDS:=@(aarch64||arm||armeb||mips||mipsel||i386||powerpc||x86_64) @!TARGET_uml \
-	  @KERNEL_SECCOMP +libubox +libblobmsg-json
+  DEPENDS:=@SECCOMP +libubox +libblobmsg-json
   TITLE:=OpenWrt process seccomp helper + utrace
 endef