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init/Kconfig: lower GCC version check for -Warray-bounds
We continue to see false positives from -Warray-bounds even in GCC 10, which is getting reported in a few places[1] still: security/security.c:811:2: warning: `memcpy' offset 32 is out of the bounds [0, 0] [-Warray-bounds] Lower the GCC version check from 11 to 10. Link: https://lkml.kernel.org/r/20240223170824.work.768-kees@kernel.org Reported-by: Lu Yao <yaolu@kylinos.cn> Closes: https://lore.kernel.org/lkml/20240117014541.8887-1-yaolu@kylinos.cn/ Link: https://lore.kernel.org/linux-next/65d84438.620a0220.7d171.81a7@mx.google.com [1] Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Paul Moore <paul@paul-moore.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Marc Aurèle La France <tsi@tuyoix.net> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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init/Kconfig

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@@ -876,14 +876,14 @@ config CC_IMPLICIT_FALLTHROUGH
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default "-Wimplicit-fallthrough=5" if CC_IS_GCC && $(cc-option,-Wimplicit-fallthrough=5)
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default "-Wimplicit-fallthrough" if CC_IS_CLANG && $(cc-option,-Wunreachable-code-fallthrough)
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# Currently, disable gcc-11+ array-bounds globally.
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# Currently, disable gcc-10+ array-bounds globally.
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# It's still broken in gcc-13, so no upper bound yet.
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config GCC11_NO_ARRAY_BOUNDS
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config GCC10_NO_ARRAY_BOUNDS
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def_bool y
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config CC_NO_ARRAY_BOUNDS
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bool
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default y if CC_IS_GCC && GCC_VERSION >= 110000 && GCC11_NO_ARRAY_BOUNDS
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default y if CC_IS_GCC && GCC_VERSION >= 100000 && GCC10_NO_ARRAY_BOUNDS
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# Currently, disable -Wstringop-overflow for GCC globally.
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config GCC_NO_STRINGOP_OVERFLOW

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