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[ Upstream commit072af0c638] The implementation for intra-object overflow in str*-family functions accidentally dropped compile-time write overflow checking in strcpy(), leaving it entirely to run-time. Add back the intended check. Fixes:6a39e62abb("lib: string.h: detect intra-object overflow in fortified string functions") Cc: Daniel Axtens <dja@axtens.net> Cc: Francis Laniel <laniel_francis@privacyrequired.com> Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Sasha Levin <sashal@kernel.org>