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authorGustavo A. R. Silva2023-11-30 14:29:34 -0600
committerGustavo A. R. Silva2024-01-21 17:45:31 -0600
commita5e0ace04fbf56c1794b1a2fa7a93672753b3fc7 (patch)
tree7bbc93e0a1fa41f979e198e14e02a45d7bcb9063 /init
parent113a61863ecbfb3c29f3eb18fd9813bccf1743c1 (diff)
init: Kconfig: Disable -Wstringop-overflow for GCC-11
-Wstringop-overflow is buggy in GCC-11. Therefore, we should disable this option specifically for that compiler version. To achieve this, we introduce a new configuration option: GCC11_NO_STRINGOP_OVERFLOW. The compiler option related to string operation overflow is now managed under configuration CC_STRINGOP_OVERFLOW. This option is enabled by default for all other versions of GCC that support it. Link: https://lore.kernel.org/lkml/b3c99290-40bc-426f-b3d2-1aa903f95c4e@embeddedor.com/ Link: https://lore.kernel.org/lkml/20231128091351.2bfb38dd@canb.auug.org.au/ Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/linux-hardening/ZWj1+jkweEDWbmAR@work/ Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 8df18f3a9748..8d4e836e1b6b 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -876,6 +876,18 @@ config CC_NO_ARRAY_BOUNDS
bool
default y if CC_IS_GCC && GCC_VERSION >= 110000 && GCC11_NO_ARRAY_BOUNDS
+# Currently, disable -Wstringop-overflow for GCC 11, globally.
+config GCC11_NO_STRINGOP_OVERFLOW
+ def_bool y
+
+config CC_NO_STRINGOP_OVERFLOW
+ bool
+ default y if CC_IS_GCC && GCC_VERSION >= 110000 && GCC_VERSION < 120000 && GCC11_NO_STRINGOP_OVERFLOW
+
+config CC_STRINGOP_OVERFLOW
+ bool
+ default y if CC_IS_GCC && !CC_NO_STRINGOP_OVERFLOW
+
#
# For architectures that know their GCC __int128 support is sound
#