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authorKees Cook <keescook@chromium.org>2016-10-27 17:46:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-27 18:43:43 -0700
commit0e07f663c90154079b287931257defbdb1d5405a (patch)
treeb396c18b65adbb994db8bb756f7a5c63433239b1
parentc0a0aba8e478229b2f0956918542152fbad3f794 (diff)
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>
-rw-r--r--lib/Kconfig.debug1
1 files changed, 1 insertions, 0 deletions
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
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