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 38/44] x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN
Date: Mon, 5 Sep 2022 14:24:46 +0200 [thread overview]
Message-ID: <20220905122452.2258262-39-glider@google.com> (raw)
In-Reply-To: <20220905122452.2258262-1-glider@google.com>
This is needed to allow memory tools like KASAN and KMSAN see the
memory accesses from the checksum code. Without CONFIG_GENERIC_CSUM the
tools can't see memory accesses originating from handwritten assembly
code.
For KASAN it's a question of detecting more bugs, for KMSAN using the C
implementation also helps avoid false positives originating from
seemingly uninitialized checksum values.
Signed-off-by: Alexander Potapenko <glider@google.com>
---
Link: https://linux-review.googlesource.com/id/I3e95247be55b1112af59dbba07e8cbf34e50a581
---
arch/x86/Kconfig | 4 ++++
arch/x86/include/asm/checksum.h | 16 ++++++++++------
arch/x86/lib/Makefile | 2 ++
3 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f9920f1341c8d..33f4d4baba079 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -324,6 +324,10 @@ config GENERIC_ISA_DMA
def_bool y
depends on ISA_DMA_API
+config GENERIC_CSUM
+ bool
+ default y if KMSAN || KASAN
+
config GENERIC_BUG
def_bool y
depends on BUG
diff --git a/arch/x86/include/asm/checksum.h b/arch/x86/include/asm/checksum.h
index bca625a60186c..6df6ece8a28ec 100644
--- a/arch/x86/include/asm/checksum.h
+++ b/arch/x86/include/asm/checksum.h
@@ -1,9 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0 */
-#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER 1
-#define HAVE_CSUM_COPY_USER
-#define _HAVE_ARCH_CSUM_AND_COPY
-#ifdef CONFIG_X86_32
-# include <asm/checksum_32.h>
+#ifdef CONFIG_GENERIC_CSUM
+# include <asm-generic/checksum.h>
#else
-# include <asm/checksum_64.h>
+# define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER 1
+# define HAVE_CSUM_COPY_USER
+# define _HAVE_ARCH_CSUM_AND_COPY
+# ifdef CONFIG_X86_32
+# include <asm/checksum_32.h>
+# else
+# include <asm/checksum_64.h>
+# endif
#endif
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index f76747862bd2e..7ba5f61d72735 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -65,7 +65,9 @@ ifneq ($(CONFIG_X86_CMPXCHG64),y)
endif
else
obj-y += iomap_copy_64.o
+ifneq ($(CONFIG_GENERIC_CSUM),y)
lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o
+endif
lib-y += clear_page_64.o copy_page_64.o
lib-y += memmove_64.o memset_64.o
lib-y += copy_user_64.o
--
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 ` [PATCH v6 36/44] x86: kmsan: use __msan_ string functions where possible Alexander Potapenko
2022-09-05 12:24 ` [PATCH v6 37/44] x86: kmsan: sync metadata pages on page fault Alexander Potapenko
2022-09-05 12:24 ` Alexander Potapenko [this message]
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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