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Thu, 28 Mar 2019 16:00:17 +0100 (CET) Received: by po16846vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 0DD3E6FC84; Thu, 28 Mar 2019 15:00:16 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [RFC PATCH v2 1/3] kasan: move memset/memmove/memcpy interceptors in a dedicated file To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Nicholas Piggin , Aneesh Kumar K.V , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Daniel Axtens Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kasan-dev@googlegroups.com, linux-mm@kvack.org Date: Thu, 28 Mar 2019 15:00:16 +0000 (UTC) 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: In preparation of the addition of interceptors for other string functions, this patch moves memset/memmove/memcpy interceptions in string.c Signed-off-by: Christophe Leroy --- v2: added missing includes mm/kasan/Makefile | 5 ++++- mm/kasan/common.c | 26 -------------------------- mm/kasan/string.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 58 insertions(+), 27 deletions(-) create mode 100644 mm/kasan/string.c diff --git a/mm/kasan/Makefile b/mm/kasan/Makefile index 5d1065efbd47..85e91e301404 100644 --- a/mm/kasan/Makefile +++ b/mm/kasan/Makefile @@ -1,11 +1,13 @@ # SPDX-License-Identifier: GPL-2.0 KASAN_SANITIZE := n UBSAN_SANITIZE_common.o := n +UBSAN_SANITIZE_string.o := n UBSAN_SANITIZE_generic.o := n UBSAN_SANITIZE_tags.o := n KCOV_INSTRUMENT := n CFLAGS_REMOVE_common.o = -pg +CFLAGS_REMOVE_string.o = -pg CFLAGS_REMOVE_generic.o = -pg CFLAGS_REMOVE_tags.o = -pg @@ -13,9 +15,10 @@ CFLAGS_REMOVE_tags.o = -pg # see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63533 CFLAGS_common.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) +CFLAGS_string.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) CFLAGS_generic.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) CFLAGS_tags.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) -obj-$(CONFIG_KASAN) := common.o init.o report.o +obj-$(CONFIG_KASAN) := common.o init.o report.o string.o obj-$(CONFIG_KASAN_GENERIC) += generic.o generic_report.o quarantine.o obj-$(CONFIG_KASAN_SW_TAGS) += tags.o tags_report.o diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 80bbe62b16cd..3b94f484bf78 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -109,32 +109,6 @@ void kasan_check_write(const volatile void *p, unsigned int size) } EXPORT_SYMBOL(kasan_check_write); -#undef memset -void *memset(void *addr, int c, size_t len) -{ - check_memory_region((unsigned long)addr, len, true, _RET_IP_); - - return __memset(addr, c, len); -} - -#undef memmove -void *memmove(void *dest, const void *src, size_t len) -{ - check_memory_region((unsigned long)src, len, false, _RET_IP_); - check_memory_region((unsigned long)dest, len, true, _RET_IP_); - - return __memmove(dest, src, len); -} - -#undef memcpy -void *memcpy(void *dest, const void *src, size_t len) -{ - check_memory_region((unsigned long)src, len, false, _RET_IP_); - check_memory_region((unsigned long)dest, len, true, _RET_IP_); - - return __memcpy(dest, src, len); -} - /* * Poisons the shadow memory for 'size' bytes starting from 'addr'. * Memory addresses should be aligned to KASAN_SHADOW_SCALE_SIZE. diff --git a/mm/kasan/string.c b/mm/kasan/string.c new file mode 100644 index 000000000000..083b967255a2 --- /dev/null +++ b/mm/kasan/string.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * This file contains strings functions for KASAN + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "kasan.h" + +#undef memset +void *memset(void *addr, int c, size_t len) +{ + check_memory_region((unsigned long)addr, len, true, _RET_IP_); + + return __memset(addr, c, len); +} + +#undef memmove +void *memmove(void *dest, const void *src, size_t len) +{ + check_memory_region((unsigned long)src, len, false, _RET_IP_); + check_memory_region((unsigned long)dest, len, true, _RET_IP_); + + return __memmove(dest, src, len); +} + +#undef memcpy +void *memcpy(void *dest, const void *src, size_t len) +{ + check_memory_region((unsigned long)src, len, false, _RET_IP_); + check_memory_region((unsigned long)dest, len, true, _RET_IP_); + + return __memcpy(dest, src, len); +} -- 2.13.3 From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS autolearn=unavailable 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 067D1C43381 for ; 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Thu, 28 Mar 2019 16:00:17 +0100 (CET) Received: by po16846vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 0DD3E6FC84; Thu, 28 Mar 2019 15:00:16 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [RFC PATCH v2 1/3] kasan: move memset/memmove/memcpy interceptors in a dedicated file To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Nicholas Piggin , Aneesh Kumar K.V , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Daniel Axtens Date: Thu, 28 Mar 2019 15:00:16 +0000 (UTC) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" In preparation of the addition of interceptors for other string functions, this patch moves memset/memmove/memcpy interceptions in string.c Signed-off-by: Christophe Leroy --- v2: added missing includes mm/kasan/Makefile | 5 ++++- mm/kasan/common.c | 26 -------------------------- mm/kasan/string.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 58 insertions(+), 27 deletions(-) create mode 100644 mm/kasan/string.c diff --git a/mm/kasan/Makefile b/mm/kasan/Makefile index 5d1065efbd47..85e91e301404 100644 --- a/mm/kasan/Makefile +++ b/mm/kasan/Makefile @@ -1,11 +1,13 @@ # SPDX-License-Identifier: GPL-2.0 KASAN_SANITIZE := n UBSAN_SANITIZE_common.o := n +UBSAN_SANITIZE_string.o := n UBSAN_SANITIZE_generic.o := n UBSAN_SANITIZE_tags.o := n KCOV_INSTRUMENT := n CFLAGS_REMOVE_common.o = -pg +CFLAGS_REMOVE_string.o = -pg CFLAGS_REMOVE_generic.o = -pg CFLAGS_REMOVE_tags.o = -pg @@ -13,9 +15,10 @@ CFLAGS_REMOVE_tags.o = -pg # see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63533 CFLAGS_common.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) +CFLAGS_string.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) CFLAGS_generic.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) CFLAGS_tags.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) -obj-$(CONFIG_KASAN) := common.o init.o report.o +obj-$(CONFIG_KASAN) := common.o init.o report.o string.o obj-$(CONFIG_KASAN_GENERIC) += generic.o generic_report.o quarantine.o obj-$(CONFIG_KASAN_SW_TAGS) += tags.o tags_report.o diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 80bbe62b16cd..3b94f484bf78 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -109,32 +109,6 @@ void kasan_check_write(const volatile void *p, unsigned int size) } EXPORT_SYMBOL(kasan_check_write); -#undef memset -void *memset(void *addr, int c, size_t len) -{ - check_memory_region((unsigned long)addr, len, true, _RET_IP_); - - return __memset(addr, c, len); -} - -#undef memmove -void *memmove(void *dest, const void *src, size_t len) -{ - check_memory_region((unsigned long)src, len, false, _RET_IP_); - check_memory_region((unsigned long)dest, len, true, _RET_IP_); - - return __memmove(dest, src, len); -} - -#undef memcpy -void *memcpy(void *dest, const void *src, size_t len) -{ - check_memory_region((unsigned long)src, len, false, _RET_IP_); - check_memory_region((unsigned long)dest, len, true, _RET_IP_); - - return __memcpy(dest, src, len); -} - /* * Poisons the shadow memory for 'size' bytes starting from 'addr'. * Memory addresses should be aligned to KASAN_SHADOW_SCALE_SIZE. diff --git a/mm/kasan/string.c b/mm/kasan/string.c new file mode 100644 index 000000000000..083b967255a2 --- /dev/null +++ b/mm/kasan/string.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * This file contains strings functions for KASAN + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "kasan.h" + +#undef memset +void *memset(void *addr, int c, size_t len) +{ + check_memory_region((unsigned long)addr, len, true, _RET_IP_); + + return __memset(addr, c, len); +} + +#undef memmove +void *memmove(void *dest, const void *src, size_t len) +{ + check_memory_region((unsigned long)src, len, false, _RET_IP_); + check_memory_region((unsigned long)dest, len, true, _RET_IP_); + + return __memmove(dest, src, len); +} + +#undef memcpy +void *memcpy(void *dest, const void *src, size_t len) +{ + check_memory_region((unsigned long)src, len, false, _RET_IP_); + check_memory_region((unsigned long)dest, len, true, _RET_IP_); + + return __memcpy(dest, src, len); +} -- 2.13.3