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From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
	"Gustavo A. R. Silva" <gustavoars@kernel.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Masahiro Yamada <masahiroy@kernel.org>,
	linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com,
	linux-hardening@vger.kernel.org
Subject: [PATCH 5/5] Makefile: Enable -Wzero-length-bounds
Date: Wed, 18 Aug 2021 01:11:18 -0700	[thread overview]
Message-ID: <20210818081118.1667663-6-keescook@chromium.org> (raw)
In-Reply-To: <20210818081118.1667663-1-keescook@chromium.org>

With all known internal zero-length accesses fixed, it is possible to
enable -Wzero-length-bounds globally. Since this is included by default
in -Warray-bounds, we just need to stop disabling it.

Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 Makefile | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Makefile b/Makefile
index af22b83cede7..3b6fb740584e 100644
--- a/Makefile
+++ b/Makefile
@@ -1071,7 +1071,6 @@ KBUILD_CFLAGS += -Wno-pointer-sign
 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
 
 # We'll want to enable this eventually, but it's not going away for 5.7 at least
-KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
 
 # Another good warning that we'll want to enable eventually
-- 
2.30.2


  parent reply	other threads:[~2021-08-18  8:11 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-18  8:11 [PATCH 0/5] Enable -Warray-bounds and -Wzero-length-bounds Kees Cook
2021-08-18  8:11 ` [PATCH 1/5] stddef: Add flexible array union helper Kees Cook
2021-08-18  8:11 ` [PATCH 2/5] treewide: Replace open-coded flex arrays in unions Kees Cook
2021-08-18  8:11   ` Kees Cook
2021-08-18  9:56   ` Marc Kleine-Budde
2021-08-18  9:56     ` Marc Kleine-Budde
2021-08-18 21:51     ` Kees Cook
2021-08-18 21:51       ` Kees Cook
2021-08-18  8:11 ` [PATCH 3/5] treewide: Replace 0-element memcpy() destinations with flexible arrays Kees Cook
2021-08-18  8:11   ` Kees Cook
2021-08-18  8:11 ` [PATCH 4/5] Makefile: Enable -Warray-bounds Kees Cook
2022-02-02 16:09   ` Guenter Roeck
2022-02-02 20:56     ` Kees Cook
2022-02-02 23:33       ` Guenter Roeck
2022-02-03  3:03         ` Kees Cook
2022-02-02 22:02     ` Kees Cook
2022-02-02 22:11     ` Kees Cook
2022-02-02 23:21       ` Guenter Roeck
2022-02-03  3:02         ` Kees Cook
2021-08-18  8:11 ` Kees Cook [this message]
2021-08-25 21:17   ` [PATCH 5/5] Makefile: Enable -Wzero-length-bounds Nick Desaulniers

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