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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-28 08:31:48 -1000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-28 08:31:48 -1000 |
| commit | 8508b97ae2b6c73c2c09798c9fa9d27ec57ff1dc (patch) | |
| tree | a5dcf52347b95a669857c9b66d51ddeed8a3783e | |
| parent | afdd14704d7eb4d7634cb7ba8d117066fed44282 (diff) | |
| parent | 24845dcb170e16b3100bd49743687648c71387ae (diff) | |
Merge tag 'clang-features-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull clang feature fixes from Kees Cook:
- Correctly pass stack frame size checking under LTO (Nick Desaulniers)
- Avoid CFI mismatches by checking initcall_t types (Marco Elver)
* tag 'clang-features-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
Makefile: LTO: have linker check -Wframe-larger-than
init: verify that function is initcall_t at compile-time
| -rw-r--r-- | Makefile | 5 | ||||
| -rw-r--r-- | include/linux/init.h | 3 |
2 files changed, 7 insertions, 1 deletions
@@ -928,6 +928,11 @@ CC_FLAGS_LTO += -fvisibility=hidden # Limit inlining across translation units to reduce binary size KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 + +# Check for frame size exceeding threshold during prolog/epilog insertion. +ifneq ($(CONFIG_FRAME_WARN),0) +KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) +endif endif ifdef CONFIG_LTO diff --git a/include/linux/init.h b/include/linux/init.h index 045ad1650ed1..d82b4b2e1d25 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -242,7 +242,8 @@ extern bool initcall_debug; asm(".section \"" __sec "\", \"a\" \n" \ __stringify(__name) ": \n" \ ".long " __stringify(__stub) " - . \n" \ - ".previous \n"); + ".previous \n"); \ + static_assert(__same_type(initcall_t, &fn)); #else #define ____define_initcall(fn, __unused, __name, __sec) \ static initcall_t __name __used \ |