From: Alexander Potapenko <glider@google.com>
To: glider@google.com
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
Alexei Starovoitov <ast@kernel.org>,
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>,
kasan-dev@googlegroups.com, linux-mm@kvack.org,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v6 36/44] x86: kmsan: use __msan_ string functions where possible.
Date: Mon, 5 Sep 2022 14:24:44 +0200 [thread overview]
Message-ID: <20220905122452.2258262-37-glider@google.com> (raw)
In-Reply-To: <20220905122452.2258262-1-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 3b401fa0f3746..6c8a1a29d0b63 100644
--- a/include/linux/fortify-string.h
+++ b/include/linux/fortify-string.h
@@ -285,8 +285,10 @@ __FORTIFY_INLINE void fortify_memset_chk(__kernel_size_t size,
* __builtin_object_size() must be captured here to avoid evaluating argument
* side-effects further into the macro layers.
*/
+#ifndef CONFIG_KMSAN
#define memset(p, c, s) __fortify_memset_chk(p, c, s, \
__builtin_object_size(p, 0), __builtin_object_size(p, 1))
+#endif
/*
* To make sure the compiler can enforce protection against buffer overflows,
--
2.37.2.789.g6183377224-goog
next prev parent reply other threads:[~2022-09-05 12:32 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-05 12:24 [PATCH v6 00/44] Add KernelMemorySanitizer infrastructure Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 01/44] x86: add missing include to sparsemem.h Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 02/44] stackdepot: reserve 5 extra bits in depot_stack_handle_t Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 03/44] instrumented.h: allow instrumenting both sides of copy_from_user() Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 04/44] x86: asm: instrument usercopy in get_user() and put_user() Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 05/44] asm-generic: instrument usercopy in cacheflush.h Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 06/44] kmsan: add ReST documentation Alexander Potapenko
2022-09-06 3:10 ` [PATCH v6 6/44] " Bagas Sanjaya
2022-11-07 14:24 ` Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 07/44] kmsan: introduce __no_sanitize_memory and __no_kmsan_checks Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 08/44] kmsan: mark noinstr as __no_sanitize_memory Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 09/44] x86: kmsan: pgtable: reduce vmalloc space Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 10/44] libnvdimm/pfn_dev: increase MAX_STRUCT_PAGE_SIZE Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 11/44] kmsan: add KMSAN runtime core Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 12/44] kmsan: disable instrumentation of unsupported common kernel code Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 13/44] MAINTAINERS: add entry for KMSAN Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 14/44] mm: kmsan: maintain KMSAN metadata for page operations Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 15/44] mm: kmsan: call KMSAN hooks from SLUB code Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 16/44] kmsan: handle task creation and exiting Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 17/44] init: kmsan: call KMSAN initialization routines Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 18/44] instrumented.h: add KMSAN support Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 19/44] kmsan: unpoison @tlb in arch_tlb_gather_mmu() Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 20/44] kmsan: add iomap support Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 21/44] Input: libps2: mark data received in __ps2_command() as initialized Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 22/44] dma: kmsan: unpoison DMA mappings Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 23/44] virtio: kmsan: check/unpoison scatterlist in vring_map_one_sg() Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 24/44] kmsan: handle memory sent to/from USB Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 25/44] kmsan: add tests for KMSAN Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 26/44] kmsan: disable strscpy() optimization under KMSAN Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 27/44] crypto: kmsan: disable accelerated configs " Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 28/44] kmsan: disable physical page merging in biovec Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 29/44] block: kmsan: skip bio block merging logic for KMSAN Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 30/44] kcov: kmsan: unpoison area->list in kcov_remote_area_put() Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 31/44] security: kmsan: fix interoperability with auto-initialization Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 32/44] objtool: kmsan: list KMSAN API functions as uaccess-safe Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 33/44] x86: kmsan: disable instrumentation of unsupported code Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 34/44] x86: kmsan: skip shadow checks in __switch_to() Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 35/44] x86: kmsan: handle open-coded assembly in lib/iomem.c Alexander Potapenko
2022-09-05 12:24 ` Alexander Potapenko [this message]
2022-09-05 12:24 ` [PATCH v6 37/44] x86: kmsan: sync metadata pages on page fault Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 38/44] x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 39/44] x86: fs: kmsan: disable CONFIG_DCACHE_WORD_ACCESS Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 40/44] x86: kmsan: don't instrument stack walking functions Alexander Potapenko
2022-09-09 8:57 ` Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 41/44] entry: kmsan: introduce kmsan_unpoison_entry_regs() Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 42/44] bpf: kmsan: initialize BPF registers with zeroes Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 43/44] mm: fs: initialize fsdata passed to write_begin/write_end interface Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 44/44] x86: kmsan: enable KMSAN builds for x86 Alexander Potapenko
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