From patchwork Thu Jan 7 07:53:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Walter Wu X-Patchwork-Id: 12003085 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MIME_BASE64_TEXT,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DDCDDC433E6 for ; Thu, 7 Jan 2021 07:56:55 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 437342312A for ; Thu, 7 Jan 2021 07:56:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 437342312A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5D98C6B020D; Thu, 7 Jan 2021 02:56:54 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 58A406B020F; Thu, 7 Jan 2021 02:56:54 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4C9066B0246; Thu, 7 Jan 2021 02:56:54 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0178.hostedemail.com [216.40.44.178]) by kanga.kvack.org (Postfix) with ESMTP id 37DCF6B020D for ; Thu, 7 Jan 2021 02:56:54 -0500 (EST) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 6EA44824556B for ; Thu, 7 Jan 2021 07:56:52 +0000 (UTC) X-FDA: 77678222664.27.deer71_1b04ab2274e8 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin27.hostedemail.com (Postfix) with ESMTP id 551A73D663 for ; Thu, 7 Jan 2021 07:56:52 +0000 (UTC) X-HE-Tag: deer71_1b04ab2274e8 X-Filterd-Recvd-Size: 11091 Received: from mailgw02.mediatek.com (mailgw02.mediatek.com [216.200.240.185]) by imf15.hostedemail.com (Postfix) with ESMTP for ; Thu, 7 Jan 2021 07:56:51 +0000 (UTC) X-UUID: 9c5f1e8ce93f44e29f80e207bff16aa9-20210106 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=7fWiainM3s+8hDe1nHH4p+1JZfPva9R9A/d20rWUkb8=; b=fPW6eNEgOzAL/2xMswLL85TiQe5Rvd66lhuSzoJrjox+wpZydFS8C1gTYLA0qrozSTqRHFAU+iW+HhRi6cC5DyWmVrWC+s8w8PlEcYfubirA0AOU3XDVK0LdlEnwuEg8JkMni6hTbx+g9/d+2PopCZ3PbW8JZmPdPCgClHHqWiE=; X-UUID: 9c5f1e8ce93f44e29f80e207bff16aa9-20210106 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 929616338; Wed, 06 Jan 2021 23:56:46 -0800 Received: from MTKMBS01N2.mediatek.inc (172.21.101.79) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 6 Jan 2021 23:53:19 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 7 Jan 2021 15:53:16 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 7 Jan 2021 15:53:16 +0800 From: Walter Wu To: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Andrey Konovalov , Andrew Morton CC: , , , , wsd_upstream , , Walter Wu Subject: [PATCH v2] kasan: remove redundant config option Date: Thu, 7 Jan 2021 15:53:15 +0800 Message-ID: <20210107075315.3482-1-walter-zh.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-TM-SNTS-SMTP: E78C0B405E861FCE6BCE4616FBB772D33CB9E246196C4D61EC7F1C80699ACF402000:8 X-MTK: N X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: CONFIG_KASAN_STACK and CONFIG_KASAN_STACK_ENABLE both enable KASAN stack instrumentation, but we should only need one config, so that we remove CONFIG_KASAN_STACK_ENABLE and make CONFIG_KASAN_STACK workable. see [1]. When enable KASAN stack instrumentation, then for gcc we could do no prompt and default value y, and for clang prompt and default value n. [1]: https://bugzilla.kernel.org/show_bug.cgi?id=210221 Signed-off-by: Walter Wu Suggested-by: Dmitry Vyukov Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Andrey Konovalov Cc: Alexander Potapenko Cc: Andrew Morton --- v2: make commit log to be more readable. --- arch/arm64/kernel/sleep.S | 2 +- arch/x86/kernel/acpi/wakeup_64.S | 2 +- include/linux/kasan.h | 2 +- lib/Kconfig.kasan | 11 ++++------- mm/kasan/common.c | 2 +- mm/kasan/kasan.h | 2 +- mm/kasan/report_generic.c | 2 +- scripts/Makefile.kasan | 10 ++++++++-- 8 files changed, 18 insertions(+), 15 deletions(-) diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S index 6bdef7362c0e..7c44ede122a9 100644 --- a/arch/arm64/kernel/sleep.S +++ b/arch/arm64/kernel/sleep.S @@ -133,7 +133,7 @@ SYM_FUNC_START(_cpu_resume) */ bl cpu_do_resume -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) mov x0, sp bl kasan_unpoison_task_stack_below #endif diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S index 5d3a0b8fd379..c7f412f4e07d 100644 --- a/arch/x86/kernel/acpi/wakeup_64.S +++ b/arch/x86/kernel/acpi/wakeup_64.S @@ -112,7 +112,7 @@ SYM_FUNC_START(do_suspend_lowlevel) movq pt_regs_r14(%rax), %r14 movq pt_regs_r15(%rax), %r15 -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) /* * The suspend path may have poisoned some areas deeper in the stack, * which we now need to unpoison. diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 5e0655fb2a6f..35d1e9b2cbfa 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -302,7 +302,7 @@ static inline void kasan_kfree_large(void *ptr, unsigned long ip) {} #endif /* CONFIG_KASAN */ -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) void kasan_unpoison_task_stack(struct task_struct *task); #else static inline void kasan_unpoison_task_stack(struct task_struct *task) {} diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan index f5fa4ba126bf..59de74293454 100644 --- a/lib/Kconfig.kasan +++ b/lib/Kconfig.kasan @@ -138,9 +138,11 @@ config KASAN_INLINE endchoice -config KASAN_STACK_ENABLE - bool "Enable stack instrumentation (unsafe)" if CC_IS_CLANG && !COMPILE_TEST +config KASAN_STACK + bool "Enable stack instrumentation (unsafe)" depends on KASAN_GENERIC || KASAN_SW_TAGS + default y if CC_IS_GCC + default n if CC_IS_CLANG help The LLVM stack address sanitizer has a know problem that causes excessive stack usage in a lot of functions, see @@ -154,11 +156,6 @@ config KASAN_STACK_ENABLE CONFIG_COMPILE_TEST. On gcc it is assumed to always be safe to use and enabled by default. -config KASAN_STACK - int - default 1 if KASAN_STACK_ENABLE || CC_IS_GCC - default 0 - config KASAN_SW_TAGS_IDENTIFY bool "Enable memory corruption identification" depends on KASAN_SW_TAGS diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 38ba2aecd8f4..02ec7f81dc16 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -63,7 +63,7 @@ void __kasan_unpoison_range(const void *address, size_t size) unpoison_range(address, size); } -#if CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN_STACK) /* Unpoison the entire stack for a task. */ void kasan_unpoison_task_stack(struct task_struct *task) { diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index cc4d9e1d49b1..bdfdb1cff653 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -224,7 +224,7 @@ void *find_first_bad_addr(void *addr, size_t size); const char *get_bug_type(struct kasan_access_info *info); void metadata_fetch_row(char *buffer, void *row); -#if defined(CONFIG_KASAN_GENERIC) && CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN_GENERIC) && defined(CONFIG_KASAN_STACK) void print_address_stack_frame(const void *addr); #else static inline void print_address_stack_frame(const void *addr) { } diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c index 8a9c889872da..137a1dba1978 100644 --- a/mm/kasan/report_generic.c +++ b/mm/kasan/report_generic.c @@ -128,7 +128,7 @@ void metadata_fetch_row(char *buffer, void *row) memcpy(buffer, kasan_mem_to_shadow(row), META_BYTES_PER_ROW); } -#if CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN_STACK) static bool __must_check tokenize_frame_descr(const char **frame_descr, char *token, size_t max_tok_len, unsigned long *value) diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 1e000cc2e7b4..abf231d209b1 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -2,6 +2,12 @@ CFLAGS_KASAN_NOSANITIZE := -fno-builtin KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) +ifdef CONFIG_KASAN_STACK + stack_enable := 1 +else + stack_enable := 0 +endif + ifdef CONFIG_KASAN_GENERIC ifdef CONFIG_KASAN_INLINE @@ -27,7 +33,7 @@ else CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ $(call cc-param,asan-globals=1) \ $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ - $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \ + $(call cc-param,asan-stack=$(stack_enable)) \ $(call cc-param,asan-instrument-allocas=1) endif @@ -42,7 +48,7 @@ else endif CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ - -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \ + -mllvm -hwasan-instrument-stack=$(stack_enable) \ -mllvm -hwasan-use-short-granules=0 \ $(instrumentation_flags)