diff options
| author | Kees Cook <kees@kernel.org> | 2026-02-20 13:15:58 -0800 |
|---|---|---|
| committer | Kees Cook <kees@kernel.org> | 2026-02-21 01:01:14 -0800 |
| commit | d39a1d7486d98668dd34aaa6732aad7977c45f5a (patch) | |
| tree | e3d0917dd485ceaca58f9c557550933a9acb2ab9 /include/linux | |
| parent | d79526b89571ae447c1a5cfd3d627efa07098348 (diff) | |
compiler_types: Disable __builtin_counted_by_ref for Clang
Unfortunately, there is a corner case of __builtin_counted_by_ref()
usage that crashes[1] Clang since support was introduced in Clang 19.
Disable it prior to Clang 22. Found while tested kmalloc_obj treewide
refactoring (via kmalloc_flex() usage).
Link: https://github.com/llvm/llvm-project/issues/182575 [1]
Signed-off-by: Kees Cook <kees@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/compiler_types.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index b1b141394d13..890076d0974b 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -552,7 +552,8 @@ struct ftrace_likely_data { * gcc: https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005fcounted_005fby_005fref * clang: https://clang.llvm.org/docs/LanguageExtensions.html#builtin-counted-by-ref */ -#if __has_builtin(__builtin_counted_by_ref) +#if __has_builtin(__builtin_counted_by_ref) && \ + !defined(CONFIG_CC_HAS_BROKEN_COUNTED_BY_REF) /** * __flex_counter() - Get pointer to counter member for the given * flexible array, if it was annotated with __counted_by() |