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Message-ID: <20160310173144.GA25532@www.outflux.net>
Date: Thu, 10 Mar 2016 09:31:44 -0800
From: Kees Cook <keescook@...omium.org>
To: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>,
Christian Borntraeger <borntraeger@...ibm.com>,
linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: [PATCH] s390: disable postinit-readonly for now
This is a temporary fix to let lkdtm run again on s390, though it'll
still fail the ro_after_init tests. Until rodata and ro_after_init
sections can be split on s390, disable special handling of ro_after_init.
Signed-off-by: Kees Cook <keescook@...omium.org>
---
for -next ...
---
arch/s390/include/asm/cache.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/s390/include/asm/cache.h b/arch/s390/include/asm/cache.h
index 4d7ccac5fd1d..22da3b34c655 100644
--- a/arch/s390/include/asm/cache.h
+++ b/arch/s390/include/asm/cache.h
@@ -15,4 +15,7 @@
#define __read_mostly __attribute__((__section__(".data..read_mostly")))
+/* Read-only memory is marked before mark_rodata_ro() is called. */
+#define __ro_after_init __read_mostly
+
#endif
--
2.6.3
--
Kees Cook
Chrome OS & Brillo Security
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