linux-kernel - [PATCH] framewarn: expand KASAN

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Message-Id: <20180921001513.12504-1-Jason@zx2c4.com>
Date:   Fri, 21 Sep 2018 02:15:13 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrew Lutomirski <luto@...nel.org>
Cc:     "Jason A. Donenfeld" <Jason@...c4.com>
Subject: [PATCH] framewarn: expand KASAN_EXTRA exception to KASAN

It turns out that KASAN in general will bloat stack frames in unexpected
ways, not just KASAN_EXTRA. So, this patch trivially changes that
default to be associated with KASAN instead of KASAN_EXTRA.

Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
---
 lib/Kconfig.debug | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 4966c4fbe7f7..39078a080e29 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -222,7 +222,7 @@ config ENABLE_MUST_CHECK
 config FRAME_WARN
 	int "Warn for stack frames larger than (needs gcc 4.4)"
 	range 0 8192
-	default 3072 if KASAN_EXTRA
+	default 3072 if KASAN
 	default 2048 if GCC_PLUGIN_LATENT_ENTROPY
 	default 1280 if (!64BIT && PARISC)
 	default 1024 if (!64BIT && !PARISC)
-- 
2.19.0