From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Masahiro Yamada <masahiroy@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Nicolas Schier <nicolas@fjasle.eu>
Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
linux-hardening@vger.kernel.org
Subject: [PATCH][next] Makefile: Enable -Wstringop-overflow globally
Date: Wed, 15 Nov 2023 21:27:05 -0600 [thread overview]
Message-ID: <ZVWMCZ/jb4nX3yHn@work> (raw)
It seems that we have finished addressing all the remaining
issues regarding compiler option -Wstringop-overflow. So, we
are now in good shape to enable this compiler option globally.
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
Makefile | 3 +++
| 2 --
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
index 690cde550acd..452b7d0e19e9 100644
--- a/Makefile
+++ b/Makefile
@@ -985,6 +985,9 @@ NOSTDINC_FLAGS += -nostdinc
# perform bounds checking.
KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3)
+# We are now in good shape to enable this option.
+KBUILD_CFLAGS += $(call cc-option, -Wstringop-overflow)
+
# disable invalid "can't wrap" optimizations for signed / pointers
KBUILD_CFLAGS += -fno-strict-overflow
--git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 2fe6f2828d37..1527199161d7 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -106,7 +106,6 @@ KBUILD_CFLAGS += $(call cc-option, -Wunused-const-variable)
KBUILD_CFLAGS += $(call cc-option, -Wpacked-not-aligned)
KBUILD_CFLAGS += $(call cc-option, -Wformat-overflow)
KBUILD_CFLAGS += $(call cc-option, -Wformat-truncation)
-KBUILD_CFLAGS += $(call cc-option, -Wstringop-overflow)
KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation)
KBUILD_CPPFLAGS += -Wundef
@@ -122,7 +121,6 @@ KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
-KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
ifdef CONFIG_CC_IS_CLANG
--
2.34.1
next reply other threads:[~2023-11-16 3:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-16 3:27 Gustavo A. R. Silva [this message]
2023-11-16 11:23 ` [PATCH][next] Makefile: Enable -Wstringop-overflow globally Masahiro Yamada
2023-11-16 14:18 ` Gustavo A. R. Silva
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