From 0e07f663c90154079b287931257defbdb1d5405a Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Thu, 27 Oct 2016 17:46:41 -0700
Subject: latent_entropy: raise CONFIG_FRAME_WARN by default

When building with the latent_entropy plugin, set the default
CONFIG_FRAME_WARN to 2048, since some __init functions have many basic
blocks that, when instrumented by the latent_entropy plugin, grow beyond
1024 byte stack size on 32-bit builds.

Link: http://lkml.kernel.org/r/20161018211216.GA39687@beast
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Emese Revfy <re.emese@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Michal Marek <mmarek@suse.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/Kconfig.debug | 1 +
 1 file changed, 1 insertion(+)

(limited to 'lib/Kconfig.debug')

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 33bc56cf60d7..b01e547d4d04 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -198,6 +198,7 @@ config FRAME_WARN
 	int "Warn for stack frames larger than (needs gcc 4.4)"
 	range 0 8192
 	default 0 if KASAN
+	default 2048 if GCC_PLUGIN_LATENT_ENTROPY
 	default 1024 if !64BIT
 	default 2048 if 64BIT
 	help
-- 
cgit v1.2.3


From e6b5f1be7afe1657c40c08082c562b1a036a54c1 Mon Sep 17 00:00:00 2001
From: Babu Moger <babu.moger@oracle.com>
Date: Wed, 2 Nov 2016 09:36:32 -0700
Subject: config: Adding the new config parameter CONFIG_PROVE_LOCKING_SMALL
 for sparc

This new config parameter limits the space used for "Lock debugging:
prove locking correctness" by about 4MB. The current sparc systems have
the limitation of 32MB size for kernel size including .text, .data and
.bss sections. With PROVE_LOCKING feature, the kernel size could grow
beyond this limit and causing system boot-up issues. With this option,
kernel limits the size of the entries of lock_chains, stack_trace etc.,
so that kernel fits in required size limit. This is not visible to user
and only used for sparc.

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 lib/Kconfig.debug | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib/Kconfig.debug')

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index b01e547d4d04..a6c8db1d62f6 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1085,6 +1085,9 @@ config PROVE_LOCKING
 
 	 For more details, see Documentation/locking/lockdep-design.txt.
 
+config PROVE_LOCKING_SMALL
+	bool
+
 config LOCKDEP
 	bool
 	depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
-- 
cgit v1.2.3