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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-01 17:09:03 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-01 17:09:03 -0700 |
commit | f594e28d805aca2c6e158cc647f133cab58a8bb4 (patch) | |
tree | bbc6044de5bc18185c0de5318fc0d2890f9a32d8 /Makefile | |
parent | 01463374c50e4fe75abec927fa231f8f5d701852 (diff) | |
parent | 6425392acf24b6d469932dd1b217dc7b20d6447f (diff) | |
download | lwn-f594e28d805aca2c6e158cc647f133cab58a8bb4.tar.gz lwn-f594e28d805aca2c6e158cc647f133cab58a8bb4.zip |
Merge tag 'hardening-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull compiler hardening updates from Kees Cook:
"These are various compiler-related hardening feature updates. Notable
is the addition of an explicit limited rationale for, and deprecation
schedule of, gcc-plugins.
gcc-plugins:
- remove support for GCC 4.9 and older (Ard Biesheuvel)
- remove duplicate include in gcc-common.h (Ye Guojin)
- Explicitly document purpose and deprecation schedule (Kees Cook)
- Remove cyc_complexity (Kees Cook)
instrumentation:
- Avoid harmless Clang option under CONFIG_INIT_STACK_ALL_ZERO (Kees Cook)
Clang LTO:
- kallsyms: strip LTO suffixes from static functions (Nick Desaulniers)"
* tag 'hardening-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
gcc-plugins: remove duplicate include in gcc-common.h
gcc-plugins: Remove cyc_complexity
gcc-plugins: Explicitly document purpose and deprecation schedule
kallsyms: strip LTO suffixes from static functions
gcc-plugins: remove support for GCC 4.9 and older
hardening: Avoid harmless Clang option under CONFIG_INIT_STACK_ALL_ZERO
Diffstat (limited to 'Makefile')
-rw-r--r-- | Makefile | 6 |
1 files changed, 3 insertions, 3 deletions
@@ -831,12 +831,12 @@ endif # Initialize all stack variables with a zero value. ifdef CONFIG_INIT_STACK_ALL_ZERO -# Future support for zero initialization is still being debated, see -# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being -# renamed or dropped. KBUILD_CFLAGS += -ftrivial-auto-var-init=zero +ifdef CONFIG_CC_IS_CLANG +# https://bugs.llvm.org/show_bug.cgi?id=45497 KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang endif +endif # While VLAs have been removed, GCC produces unreachable stack probes # for the randomize_kstack_offset feature. Disable it for all compilers. |