The patch titled
Subject: KASAN: prohibit KASAN+STRUCTLEAK combination
has been added to the -mm tree. Its filename is
kasan-prohibit-kasanstructleak-combination.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-prohibit-kasanstructleak-combination.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-prohibit-kasanstructleak-combination.patch
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------------------------------------------------------
From: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Subject: KASAN: prohibit KASAN+STRUCTLEAK combination
Currently STRUCTLEAK inserts initialization out of live scope of variables
from KASAN point of view. This leads to KASAN false positive reports.
Prohibit this combination for now.
Link: http://lkml.kernel.org/r/20180419172451.104700-1-dvyukov@xxxxxxxxxx
Signed-off-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff -puN arch/Kconfig~kasan-prohibit-kasanstructleak-combination arch/Kconfig
--- a/arch/Kconfig~kasan-prohibit-kasanstructleak-combination
+++ a/arch/Kconfig
@@ -464,6 +464,10 @@ config GCC_PLUGIN_LATENT_ENTROPY
config GCC_PLUGIN_STRUCTLEAK
bool "Force initialization of variables containing userspace addresses"
depends on GCC_PLUGINS
+ # Currently STRUCTLEAK inserts initialization out of live scope of
+ # variables from KASAN point of view. This leads to KASAN false
+ # positive reports. Prohibit this combination for now.
+ depends on !KASAN_EXTRA
help
This plugin zero-initializes any structures containing a
__user attribute. This can prevent some classes of information
_
Patches currently in -mm which might be from dvyukov@xxxxxxxxxx are
kasan-prohibit-kasanstructleak-combination.patch
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