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lib/crypto: curve25519-hacl64: Fix older clang KASAN workaround for GCC

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commit 2b81082ad3 upstream.

Commit 2f13daee2a ("lib/crypto/curve25519-hacl64: Disable KASAN with
clang-17 and older") inadvertently disabled KASAN in curve25519-hacl64.o
for GCC unconditionally because clang-min-version will always evaluate
to nothing for GCC. Add a check for CONFIG_CC_IS_CLANG to avoid applying
the workaround for GCC, which is only needed for clang-17 and older.

Cc: stable@vger.kernel.org
Fixes: 2f13daee2a ("lib/crypto/curve25519-hacl64: Disable KASAN with clang-17 and older")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20251103-curve25519-hacl64-fix-kasan-workaround-v2-1-ab581cbd8035@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nathan Chancellor
2025-11-03 12:11:24 -07:00
committed by Greg Kroah-Hartman
parent 82fe780654
commit c664eb1166
1 changed files with 1 additions and 1 deletions
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2
lib/crypto/Makefile
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@@ -34,7 +34,7 @@ libcurve25519-generic-y := curve25519-fiat32.o
libcurve25519-generic-$(CONFIG_ARCH_SUPPORTS_INT128) := curve25519-hacl64.o
libcurve25519-generic-y += curve25519-generic.o
# clang versions prior to 18 may blow out the stack with KASAN
ifeq ($(call clang-min-version, 180000),)
ifeq ($(CONFIG_CC_IS_CLANG)_$(call clang-min-version, 180000),y_)
KASAN_SANITIZE_curve25519-hacl64.o := n
endif