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init/Kconfig: Adjust fixed clang version for __builtin_counted_by_ref

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Commit d39a1d7486 ("compiler_types: Disable __builtin_counted_by_ref
for Clang") used 22.0.0 as the fixed version for a compiler crash but
the fix was only merged in main (23.0.0) and release/22.x (22.1.0). With
the current fixed version number, prerelease or Android LLVM 22 builds
will still be able to hit the compiler crash when building the kernel.
This can be particularly disruptive when bisecting LLVM.

Use 21.1.0 as the fixed version number to ensure the fix for this crash
is always present.

Fixes: d39a1d7486 ("compiler_types: Disable __builtin_counted_by_ref for Clang")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20260223-fix-clang-version-builtin-counted-by-ref-v1-1-3ea478a24f0a@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
This commit is contained in:
Nathan Chancellor 2026-02-23 11:23:12 -07:00 • committed by Kees Cook
parent 96a7b71c44
commit f709859f33
1 changed files with 1 additions and 1 deletions
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2
init/Kconfig
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@ -153,7 +153,7 @@ config CC_HAS_COUNTED_BY_PTR
config CC_HAS_BROKEN_COUNTED_BY_REF
bool
# https://github.com/llvm/llvm-project/issues/182575
default y if CC_IS_CLANG && CLANG_VERSION < 220000
default y if CC_IS_CLANG && CLANG_VERSION < 220100
config CC_HAS_MULTIDIMENSIONAL_NONSTRING
def_bool $(success,echo 'char tag[][4] __attribute__((__nonstring__)) = { };' | $(CC) $(CLANG_FLAGS) -x c - -c -o /dev/null -Werror)