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enable hardening=+all and FORTIFY_SOURCE=3 #349

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Merged
lolyu merged 3 commits into from
Jul 5, 2026
Merged

enable hardening=+all and FORTIFY_SOURCE=3 #349

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b26bb91
enable hardening=+all and FORTIFY_SOURCE=3
xq9mend Jul 2, 2026
770a7e9
debian/rules: add full OpenSSF compiler hardening baseline
xq9mend Jul 2, 2026
d5e3b30
debian/rules: guard ftrivial-auto-var-init on GCC>=12, drop no-copy-d…
xq9mend Jul 2, 2026
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21 changes: 21 additions & 0 deletions debian/rules
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Original file line number Diff line number Diff line change
@@ -1,5 +1,26 @@
#!/usr/bin/make -f

# Provides DEB_HOST_ARCH for arch-conditional compiler flags below.
include /usr/share/dpkg/architecture.mk

# +bindnow enables -Wl,-z,now (full RELRO); required by OpenSSF hardening baseline.
export DEB_BUILD_MAINT_OPTIONS = hardening=+all,+bindnow
# OpenSSF Compiler Options Hardening Guide baseline.
# FORTIFY_SOURCE=3: upgraded from dpkg default of =2.
# _GLIBCXX_ASSERTIONS: C++ stdlib bounds checking.
export DEB_CPPFLAGS_MAINT_APPEND = -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 -D_GLIBCXX_ASSERTIONS
# fstack-clash-protection: not in bookworm hardening area; inject directly.
# fcf-protection/mbranch-protection: arch-specific CFI.
# Production safety flags per OpenSSF baseline.
# -ftrivial-auto-var-init=zero requires GCC >= 12; omit on older toolchains.
GCC_MAJOR := $(shell gcc -dumpversion 2>/dev/null | cut -d. -f1)
TRIVIAL_INIT := $(shell [ "$(GCC_MAJOR)" -ge 12 ] 2>/dev/null && echo "-ftrivial-auto-var-init=zero" || echo "")
export DEB_CFLAGS_MAINT_APPEND = -fstack-clash-protection $(if $(filter amd64,$(DEB_HOST_ARCH)),-fcf-protection=full) $(if $(filter arm64,$(DEB_HOST_ARCH)),-mbranch-protection=standard) -fno-delete-null-pointer-checks -fno-strict-overflow -fno-strict-aliasing $(TRIVIAL_INIT)
export DEB_CXXFLAGS_MAINT_APPEND = -fstack-clash-protection $(if $(filter amd64,$(DEB_HOST_ARCH)),-fcf-protection=full) $(if $(filter arm64,$(DEB_HOST_ARCH)),-mbranch-protection=standard) -fno-delete-null-pointer-checks -fno-strict-overflow -fno-strict-aliasing $(TRIVIAL_INIT)
# Linker hardening: nodlopen, noexecstack, as-needed.
# --no-copy-dt-needed-entries omitted: requires explicit transitive dep fixes per-repo.
export DEB_LDFLAGS_MAINT_APPEND = -Wl,-z,nodlopen -Wl,-z,noexecstack -Wl,--as-needed

%:
dh $@ --parallel

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