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openwrtv4/package/base-files/Makefile
Kevin Darbyshire-Bryant 7765e442d0 basefiles: allow suid coredumps 
Set sysctl fs.suid_dumpable = 2

This allows suid processes to dump core according to kernel.core_pattern
setting.  LEDE typically uses suid to drop root priviledge rather than
gain it but without this setting any suid process would be unable to
produce coredumps (e.g. dnsmasq)

Processes still need to set a non zero core file process limit ('ulimit
-c unlimited' or if procd used 'procd_set_param limits
core="unlimited"') in order to produce a core.  This setting removes an
obscure stumbling block along the way.

>From https://www.kernel.org/doc/Documentation/sysctl/fs.txt

suid_dumpable:

This value can be used to query and set the core dump mode for setuid
or otherwise protected/tainted binaries. The modes are

0 - (default) - traditional behaviour. Any process which has changed
	privilege levels or is execute only will not be dumped.
1 - (debug) - all processes dump core when possible. The core dump is
	owned by the current user and no security is applied. This is
	intended for system debugging situations only. Ptrace is unchecked.
	This is insecure as it allows regular users to examine the memory
	contents of privileged processes.
2 - (suidsafe) - any binary which normally would not be dumped is dumped
	anyway, but only if the "core_pattern" kernel sysctl is set to
	either a pipe handler or a fully qualified path. (For more details
	on this limitation, see CVE-2006-2451.) This mode is appropriate
	when administrators are attempting to debug problems in a normal
	environment, and either have a core dump pipe handler that knows
	to treat privileged core dumps with care, or specific directory
	defined for catching core dumps. If a core dump happens without
	a pipe handler or fully qualifid path, a message will be emitted
	to syslog warning about the lack of a correct setting.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com> [PKG_RELEASE increase]
2017-09-12 22:18:45 +02:00

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Makefile
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#
# Copyright (C) 2007-2016 OpenWrt.org
# Copyright (C) 2010 Vertical Communications
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
include $(INCLUDE_DIR)/version.mk
PKG_NAME:=base-files
PKG_RELEASE:=175
PKG_FLAGS:=nonshared
PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
PKG_BUILD_DEPENDS:=usign/host
PKG_LICENSE:=GPL-2.0
# Extend depends from version.mk
PKG_CONFIG_DEPENDS += \
CONFIG_SIGNED_PACKAGES CONFIG_TARGET_INIT_PATH CONFIG_TARGET_PREINIT_DISABLE_FAILSAFE \
CONFIG_NAND_SUPPORT
include $(INCLUDE_DIR)/package.mk
ifneq ($(DUMP),1)
STAMP_CONFIGURED:=$(strip $(STAMP_CONFIGURED))_$(shell echo $(CONFIG_TARGET_INIT_PATH) | mkhash md5)
TARGET:=-$(BOARD)
endif
define Package/base-files
SECTION:=base
CATEGORY:=Base system
DEPENDS:=+netifd +libc +procd +jsonfilter +SIGNED_PACKAGES:usign +SIGNED_PACKAGES:lede-keyring +NAND_SUPPORT:ubi-utils +fstools +fwtool
TITLE:=Base filesystem for Lede
URL:=http://openwrt.org/
VERSION:=$(PKG_RELEASE)-$(REVISION)
endef
define Package/base-files/conffiles
/etc/config/
/etc/config/network
/etc/config/system
/etc/crontabs/
/etc/dropbear/
/etc/group
/etc/hosts
/etc/inittab
/etc/iproute2/rt_protos
/etc/iproute2/rt_tables
/etc/passwd
/etc/profile
/etc/profile.d
/etc/protocols
/etc/rc.local
/etc/services
/etc/shadow
/etc/shells
/etc/sysctl.conf
/etc/sysctl.d/
/etc/sysctl.d/local.conf
/etc/sysupgrade.conf
$(call $(TARGET)/conffiles)
endef
define Package/base-files/description
This package contains a base filesystem and system scripts for OpenWrt.
endef
define ImageConfigOptions
mkdir -p $(1)/lib/preinit
echo 'pi_suppress_stderr="$(CONFIG_TARGET_PREINIT_SUPPRESS_STDERR)"' >$(1)/lib/preinit/00_preinit.conf
echo 'fs_failsafe_wait_timeout=$(if $(CONFIG_TARGET_PREINIT_TIMEOUT),$(CONFIG_TARGET_PREINIT_TIMEOUT),2)' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_init_path="$(TARGET_INIT_PATH)"' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_init_env=$(if $(CONFIG_TARGET_INIT_ENV),$(CONFIG_TARGET_INIT_ENV),"")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_init_cmd=$(if $(CONFIG_TARGET_INIT_CMD),$(CONFIG_TARGET_INIT_CMD),"/sbin/init")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_init_suppress_stderr="$(CONFIG_TARGET_INIT_SUPPRESS_STDERR)"' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_ifname=$(if $(CONFIG_TARGET_PREINIT_IFNAME),$(CONFIG_TARGET_PREINIT_IFNAME),"")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_ip=$(if $(CONFIG_TARGET_PREINIT_IP),$(CONFIG_TARGET_PREINIT_IP),"192.168.1.1")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_netmask=$(if $(CONFIG_TARGET_PREINIT_NETMASK),$(CONFIG_TARGET_PREINIT_NETMASK),"255.255.255.0")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_broadcast=$(if $(CONFIG_TARGET_PREINIT_BROADCAST),$(CONFIG_TARGET_PREINIT_BROADCAST),"192.168.1.255")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_preinit_net_messages="$(CONFIG_TARGET_PREINIT_SHOW_NETMSG)"' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_preinit_no_failsafe_netmsg="$(CONFIG_TARGET_PREINIT_SUPPRESS_FAILSAFE_NETMSG)"' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_preinit_no_failsafe="$(CONFIG_TARGET_PREINIT_DISABLE_FAILSAFE)"' >>$(1)/lib/preinit/00_preinit.conf
endef
define Build/Prepare
mkdir -p $(PKG_BUILD_DIR)
endef
define Build/Compile/Default
endef
Build/Compile = $(Build/Compile/Default)
ifdef CONFIG_SIGNED_PACKAGES
define Build/Configure
[ -s $(BUILD_KEY) -a -s $(BUILD_KEY).pub ] || \
$(STAGING_DIR_HOST)/bin/usign -G -s $(BUILD_KEY) -p $(BUILD_KEY).pub -c "Local build key"
endef
define Package/base-files/install-key
mkdir -p $(1)/etc/opkg/keys
$(CP) $(BUILD_KEY).pub $(1)/etc/opkg/keys/`$(STAGING_DIR_HOST)/bin/usign -F -p $(BUILD_KEY).pub`
endef
endif
ifeq ($(CONFIG_NAND_SUPPORT),)
define Package/base-files/nand-support
rm -f $(1)/lib/upgrade/nand.sh
endef
endif
define Package/base-files/install
$(CP) ./files/* $(1)/
$(Package/base-files/install-key)
$(Package/base-files/nand-support)
if [ -d $(GENERIC_PLATFORM_DIR)/base-files/. ]; then \
$(CP) $(GENERIC_PLATFORM_DIR)/base-files/* $(1)/; \
fi
if [ -d $(PLATFORM_DIR)/base-files/. ]; then \
$(CP) $(PLATFORM_DIR)/base-files/* $(1)/; \
fi
$(if $(filter-out $(PLATFORM_DIR),$(PLATFORM_SUBDIR)), \
if [ -d $(PLATFORM_SUBDIR)/base-files/. ]; then \
$(CP) $(PLATFORM_SUBDIR)/base-files/* $(1)/; \
fi; \
)
$(VERSION_SED) \
$(1)/etc/banner \
$(1)/etc/openwrt_version \
$(1)/usr/lib/os-release
$(VERSION_SED_SCRIPT) \
$(1)/etc/openwrt_release \
$(1)/etc/device_info \
$(1)/usr/lib/os-release
$(SED) "s#%PATH%#$(TARGET_INIT_PATH)#g" \
$(1)/sbin/hotplug-call \
$(1)/etc/preinit \
$(1)/etc/profile
mkdir -p $(1)/CONTROL
mkdir -p $(1)/dev
mkdir -p $(1)/etc/crontabs
mkdir -p $(1)/etc/rc.d
mkdir -p $(1)/overlay
mkdir -p $(1)/lib/firmware
$(if $(LIB_SUFFIX),-$(LN) lib $(1)/lib$(LIB_SUFFIX))
mkdir -p $(1)/mnt
mkdir -p $(1)/proc
mkdir -p $(1)/tmp
mkdir -p $(1)/usr/lib
$(if $(LIB_SUFFIX),-$(LN) lib $(1)/usr/lib$(LIB_SUFFIX))
mkdir -p $(1)/usr/bin
mkdir -p $(1)/sys
mkdir -p $(1)/www
mkdir -p $(1)/root
$(LN) /proc/mounts $(1)/etc/mtab
rm -f $(1)/var
$(LN) /tmp $(1)/var
mkdir -p $(1)/etc
$(LN) /tmp/resolv.conf /tmp/TZ /tmp/localtime $(1)/etc/
chmod 0600 $(1)/etc/shadow
chmod 1777 $(1)/tmp
$(call ImageConfigOptions,$(1))
$(call Package/base-files/install-target,$(1))
for conffile in $(1)/etc/config/*; do \
if [ -f "$$$$conffile" ]; then \
grep "$$$${conffile##$(1)}" $(1)/CONTROL/conffiles || \
echo "$$$${conffile##$(1)}" >> $(1)/CONTROL/conffiles; \
fi \
done
$(if $(CONFIG_INCLUDE_CONFIG), \
echo -e "# Build configuration for board $(BOARD)/$(SUBTARGET)/$(PROFILE)\n" >$(1)/etc/build.config; \
cat $(BIN_DIR)/config.seed >>$(1)/etc/build.config)
endef
ifneq ($(DUMP),1)
-include $(PLATFORM_DIR)/base-files.mk
-include $(PLATFORM_SUBDIR)/base-files.mk
endif
$(eval $(call BuildPackage,base-files))
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