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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-02 12:35:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-02 12:35:34 -0700 |
| commit | b55060d796c5300ad7a410cb5faec36582925570 (patch) | |
| tree | 7711068e1cfdb3cb87541d42678272314bf9e4e1 /Makefile | |
| parent | c815f04ba94940fbc303a6ea9669e7da87f8e77d (diff) | |
| parent | a8fc576d4af2f23a87a586424252df97f0ad0b06 (diff) | |
| download | lwn-b55060d796c5300ad7a410cb5faec36582925570.tar.gz lwn-b55060d796c5300ad7a410cb5faec36582925570.zip | |
Merge tag 'hardening-v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening updates from Kees Cook:
- Expand lib/test_stackinit to include more initialization styles
- Improve Kconfig for CLang's auto-var-init feature
- Introduce support for GCC's zero-call-used-regs feature
* tag 'hardening-v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
lib/test_stackinit: Add assigned initializers
lib/test_stackinit: Allow building stand-alone
lib/test_stackinit: Fix static initializer test
hardening: Clarify Kconfig text for auto-var-init
hardening: Introduce CONFIG_ZERO_CALL_USED_REGS
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -841,6 +841,11 @@ endif # for the randomize_kstack_offset feature. Disable it for all compilers. KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) +# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). +ifdef CONFIG_ZERO_CALL_USED_REGS +KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr +endif + DEBUG_CFLAGS := # Workaround for GCC versions < 5.0 |