x86/mm: Always enable CONFIG_DEBUG_RODATA and remove the Kconfig option
authorKees Cook <keescook@chromium.org>
Wed, 17 Feb 2016 22:41:14 +0000 (14:41 -0800)
committerIngo Molnar <mingo@kernel.org>
Mon, 22 Feb 2016 07:51:38 +0000 (08:51 +0100)
commit9ccaf77cf05915f51231d158abfd5448aedde758
treed6cd4476921b59c2e20773ea585792a867dc328b
parentd2aa1acad22f1bdd0cfa67b3861800e392254454
x86/mm: Always enable CONFIG_DEBUG_RODATA and remove the Kconfig option

This removes the CONFIG_DEBUG_RODATA option and makes it always enabled.

This simplifies the code and also makes it clearer that read-only mapped
memory is just as fundamental a security feature in kernel-space as it is
in user-space.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Brown <david.brown@linaro.org>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Emese Revfy <re.emese@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathias Krause <minipli@googlemail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: PaX Team <pageexec@freemail.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-hardening@lists.openwall.com
Cc: linux-arch <linux-arch@vger.kernel.org>
Link: http://lkml.kernel.org/r/1455748879-21872-4-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
13 files changed:
arch/x86/Kconfig
arch/x86/Kconfig.debug
arch/x86/include/asm/cacheflush.h
arch/x86/include/asm/kvm_para.h
arch/x86/include/asm/sections.h
arch/x86/kernel/ftrace.c
arch/x86/kernel/kgdb.c
arch/x86/kernel/test_nx.c
arch/x86/kernel/test_rodata.c
arch/x86/kernel/vmlinux.lds.S
arch/x86/mm/init_32.c
arch/x86/mm/init_64.c
arch/x86/mm/pageattr.c