From: Kees Cook <keescook@xxxxxxxxxxxx> 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@xxxxxxxxxxxx> Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx> Cc: Emese Revfy <re.emese@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Michal Marek <mmarek@xxxxxxxx> Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Cc: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: Shuah Khan <shuah@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- lib/Kconfig.debug | 1 + 1 file changed, 1 insertion(+) diff -puN lib/Kconfig.debug~latent_entropy-raise-config_frame_warn-by-default lib/Kconfig.debug --- a/lib/Kconfig.debug~latent_entropy-raise-config_frame_warn-by-default +++ a/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 _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
