From: Alexander Potapenko <glider@google.com>
To: glider@google.com
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Andrey Konovalov <andreyknvl@google.com>,
Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Borislav Petkov <bp@alien8.de>, Christoph Hellwig <hch@lst.de>,
Christoph Lameter <cl@linux.com>,
David Rientjes <rientjes@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Eric Dumazet <edumazet@google.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
Ilya Leoshkevich <iii@linux.ibm.com>,
Ingo Molnar <mingo@redhat.com>, Jens Axboe <axboe@kernel.dk>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Kees Cook <keescook@chromium.org>, Marco Elver <elver@google.com>,
Mark Rutland <mark.rutland@arm.com>,
Matthew Wilcox <willy@infradead.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Pekka Enberg <penberg@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Petr Mladek <pmladek@suse.com>,
Steven Rostedt <rostedt@goodmis.org>,
Thomas Gleixner <tglx@linutronix.de>,
Vasily Gorbik <gor@linux.ibm.com>,
Vegard Nossum <vegard.nossum@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 43/48] x86: kmsan: use __msan_ string functions where possible.
Date: Tue, 29 Mar 2022 14:40:12 +0200 [thread overview]
Message-ID: <20220329124017.737571-44-glider@google.com> (raw)
In-Reply-To: <20220329124017.737571-1-glider@google.com>
Unless stated otherwise (by explicitly calling __memcpy(), __memset() or
__memmove()) we want all string functions to call their __msan_ versions
(e.g. __msan_memcpy() instead of memcpy()), so that shadow and origin
values are updated accordingly.
Bootloader must still use the default string functions to avoid crashes.
Signed-off-by: Alexander Potapenko <glider@google.com>
---
Link: https://linux-review.googlesource.com/id/I7ca9bd6b4f5c9b9816404862ae87ca7984395f33
---
arch/x86/include/asm/string_64.h | 23 +++++++++++++++++++++--
include/linux/fortify-string.h | 2 ++
2 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/string_64.h b/arch/x86/include/asm/string_64.h
index 6e450827f677a..3b87d889b6e16 100644
--- a/arch/x86/include/asm/string_64.h
+++ b/arch/x86/include/asm/string_64.h
@@ -11,11 +11,23 @@
function. */
#define __HAVE_ARCH_MEMCPY 1
+#if defined(__SANITIZE_MEMORY__)
+#undef memcpy
+void *__msan_memcpy(void *dst, const void *src, size_t size);
+#define memcpy __msan_memcpy
+#else
extern void *memcpy(void *to, const void *from, size_t len);
+#endif
extern void *__memcpy(void *to, const void *from, size_t len);
#define __HAVE_ARCH_MEMSET
+#if defined(__SANITIZE_MEMORY__)
+extern void *__msan_memset(void *s, int c, size_t n);
+#undef memset
+#define memset __msan_memset
+#else
void *memset(void *s, int c, size_t n);
+#endif
void *__memset(void *s, int c, size_t n);
#define __HAVE_ARCH_MEMSET16
@@ -55,7 +67,13 @@ static inline void *memset64(uint64_t *s, uint64_t v, size_t n)
}
#define __HAVE_ARCH_MEMMOVE
+#if defined(__SANITIZE_MEMORY__)
+#undef memmove
+void *__msan_memmove(void *dest, const void *src, size_t len);
+#define memmove __msan_memmove
+#else
void *memmove(void *dest, const void *src, size_t count);
+#endif
void *__memmove(void *dest, const void *src, size_t count);
int memcmp(const void *cs, const void *ct, size_t count);
@@ -64,8 +82,7 @@ char *strcpy(char *dest, const char *src);
char *strcat(char *dest, const char *src);
int strcmp(const char *cs, const char *ct);
-#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
-
+#if (defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__))
/*
* For files that not instrumented (e.g. mm/slub.c) we
* should use not instrumented version of mem* functions.
@@ -73,7 +90,9 @@ int strcmp(const char *cs, const char *ct);
#undef memcpy
#define memcpy(dst, src, len) __memcpy(dst, src, len)
+#undef memmove
#define memmove(dst, src, len) __memmove(dst, src, len)
+#undef memset
#define memset(s, c, n) __memset(s, c, n)
#ifndef __NO_FORTIFY
diff --git a/include/linux/fortify-string.h b/include/linux/fortify-string.h
index a6cd6815f2490..b2c74cb85e20e 100644
--- a/include/linux/fortify-string.h
+++ b/include/linux/fortify-string.h
@@ -198,6 +198,7 @@ __FORTIFY_INLINE char *strncat(char *p, const char *q, __kernel_size_t count)
return p;
}
+#ifndef CONFIG_KMSAN
__FORTIFY_INLINE void *memset(void *p, int c, __kernel_size_t size)
{
size_t p_size = __builtin_object_size(p, 0);
@@ -240,6 +241,7 @@ __FORTIFY_INLINE void *memmove(void *p, const void *q, __kernel_size_t size)
fortify_panic(__func__);
return __underlying_memmove(p, q, size);
}
+#endif
extern void *__real_memscan(void *, int, __kernel_size_t) __RENAME(memscan);
__FORTIFY_INLINE void *memscan(void *p, int c, __kernel_size_t size)
--
2.35.1.1021.g381101b075-goog
next prev parent reply other threads:[~2022-03-29 12:48 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-29 12:39 [PATCH v2 00/48] Add KernelMemorySanitizer infrastructure Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 01/48] x86: add missing include to sparsemem.h Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 02/48] stackdepot: reserve 5 extra bits in depot_stack_handle_t Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 03/48] kasan: common: adapt to the new prototype of __stack_depot_save() Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 04/48] instrumented.h: allow instrumenting both sides of copy_from_user() Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 05/48] x86: asm: instrument usercopy in get_user() and __put_user_size() Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 06/48] asm-generic: instrument usercopy in cacheflush.h Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 07/48] kmsan: add ReST documentation Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 08/48] kmsan: introduce __no_sanitize_memory and __no_kmsan_checks Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 09/48] kmsan: mark noinstr as __no_sanitize_memory Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 10/48] x86: kmsan: pgtable: reduce vmalloc space Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 11/48] libnvdimm/pfn_dev: increase MAX_STRUCT_PAGE_SIZE Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 12/48] kcsan: clang: retire CONFIG_KCSAN_KCOV_BROKEN Alexander Potapenko
2022-03-30 6:00 ` Marco Elver
2022-03-29 12:39 ` [PATCH v2 13/48] kmsan: add KMSAN runtime core Alexander Potapenko
2022-03-30 8:58 ` Peter Zijlstra
2022-03-30 9:41 ` Peter Zijlstra
2022-04-04 14:39 ` Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 14/48] kmsan: implement kmsan_init(), initialize READ_ONCE_NOCHECK() Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 15/48] kmsan: disable instrumentation of unsupported common kernel code Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 16/48] MAINTAINERS: add entry for KMSAN Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 17/48] kmsan: mm: maintain KMSAN metadata for page operations Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 18/48] kmsan: mm: call KMSAN hooks from SLUB code Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 19/48] kmsan: handle task creation and exiting Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 20/48] kmsan: init: call KMSAN initialization routines Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 21/48] instrumented.h: add KMSAN support Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 22/48] kmsan: unpoison @tlb in arch_tlb_gather_mmu() Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 23/48] kmsan: add iomap support Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 24/48] Input: libps2: mark data received in __ps2_command() as initialized Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 25/48] kmsan: dma: unpoison DMA mappings Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 26/48] kmsan: virtio: check/unpoison scatterlist in vring_map_one_sg() Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 27/48] kmsan: handle memory sent to/from USB Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 28/48] kmsan: instrumentation.h: add instrumentation_begin_with_regs() Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 29/48] kmsan: entry: handle register passing from uninstrumented code Alexander Potapenko
2022-03-29 12:39 ` [PATCH v2 30/48] kmsan: add tests for KMSAN Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 31/48] kernel: kmsan: don't instrument stacktrace.c Alexander Potapenko
2022-04-04 14:56 ` Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 32/48] kmsan: disable strscpy() optimization under KMSAN Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 33/48] crypto: kmsan: disable accelerated configs " Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 34/48] kmsan: disable physical page merging in biovec Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 35/48] kmsan: block: skip bio block merging logic for KMSAN Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 36/48] kmsan: kcov: unpoison area->list in kcov_remote_area_put() Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 37/48] security: kmsan: fix interoperability with auto-initialization Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 38/48] objtool: kmsan: list KMSAN API functions as uaccess-safe Alexander Potapenko
2022-03-30 8:46 ` Peter Zijlstra
[not found] ` <CAG_fn=UzshCuwbq7pZ93v7+eVUgFq1dZ4L_9nEWhYnotmyZtJg@mail.gmail.com>
2022-04-14 15:38 ` Peter Zijlstra
2022-03-29 12:40 ` [PATCH v2 39/48] x86: kmsan: make READ_ONCE_TASK_STACK() return initialized values Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 40/48] x86: kmsan: disable instrumentation of unsupported code Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 41/48] x86: kmsan: skip shadow checks in __switch_to() Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 42/48] x86: kmsan: handle open-coded assembly in lib/iomem.c Alexander Potapenko
2022-03-29 12:40 ` Alexander Potapenko [this message]
2022-03-29 12:40 ` [PATCH v2 44/48] x86: kmsan: sync metadata pages on page fault Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 45/48] x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 46/48] x86: fs: kmsan: disable CONFIG_DCACHE_WORD_ACCESS Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 47/48] x86: kmsan: handle register passing from uninstrumented code Alexander Potapenko
2022-03-29 12:40 ` [PATCH v2 48/48] x86: kmsan: enable KMSAN builds for x86 Alexander Potapenko
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