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From: Andrey Konovalov <andreyknvl@google.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	kasan-dev@googlegroups.com,  linux-mm@kvack.org,
	linux-kernel@vger.kernel.org,
	 Leon Romanovsky <leonro@mellanox.com>,
	Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH 1/3] kasan: consistently disable debugging features
Date: Tue, 12 May 2020 17:33:19 +0200	[thread overview]
Message-ID: <29bd753d5ff5596425905b0b07f51153e2345cc1.1589297433.git.andreyknvl@google.com> (raw)

KASAN is incompatible with some kernel debugging/tracing features.
There's been multiple patches that disable those feature for some of
KASAN files one by one. Instead of prolonging that, disable these
features for all KASAN files at once.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
 mm/kasan/Makefile | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/mm/kasan/Makefile b/mm/kasan/Makefile
index 08b43de2383b..434d503a6525 100644
--- a/mm/kasan/Makefile
+++ b/mm/kasan/Makefile
@@ -1,23 +1,28 @@
 # SPDX-License-Identifier: GPL-2.0
 KASAN_SANITIZE := n
-UBSAN_SANITIZE_common.o := n
-UBSAN_SANITIZE_generic.o := n
-UBSAN_SANITIZE_generic_report.o := n
-UBSAN_SANITIZE_tags.o := n
+UBSAN_SANITIZE := n
 KCOV_INSTRUMENT := n
 
+# Disable ftrace to avoid recursion.
 CFLAGS_REMOVE_common.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_generic.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_generic_report.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_init.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_quarantine.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_report.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_tags.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_tags_report.o = $(CC_FLAGS_FTRACE)
 
 # Function splitter causes unnecessary splits in __asan_load1/__asan_store1
 # see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63533
-
 CFLAGS_common.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
 CFLAGS_generic.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
 CFLAGS_generic_report.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
+CFLAGS_init.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
+CFLAGS_quarantine.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
+CFLAGS_report.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
 CFLAGS_tags.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
+CFLAGS_tags_report.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
 
 obj-$(CONFIG_KASAN) := common.o init.o report.o
 obj-$(CONFIG_KASAN_GENERIC) += generic.o generic_report.o quarantine.o
-- 
2.26.2.645.ge9eca65c58-goog



             reply	other threads:[~2020-05-12 15:33 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-12 15:33 Andrey Konovalov [this message]
2020-05-12 15:33 ` [PATCH 2/3] kasan: move kasan_report() into report.c Andrey Konovalov
2020-05-12 16:42   ` Leon Romanovsky
2020-05-28 13:49   ` Qian Cai
2020-05-28 14:33     ` Josh Poimboeuf
2020-05-28 14:55       ` Peter Zijlstra
2020-05-28 15:00     ` Andrey Konovalov
2020-05-12 15:33 ` [PATCH 3/3] kasan: add missing functions declarations to kasan.h Andrey Konovalov
2020-05-12 16:41   ` Leon Romanovsky

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