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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>,
	kasan-dev@googlegroups.com, linux-mm@kvack.org,
	linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 31/46] crypto: kmsan: disable accelerated configs under KMSAN
Date: Tue, 26 Apr 2022 18:43:00 +0200	[thread overview]
Message-ID: <20220426164315.625149-32-glider@google.com> (raw)
In-Reply-To: <20220426164315.625149-1-glider@google.com>

KMSAN is unable to understand when initialized values come from assembly.
Disable accelerated configs in KMSAN builds to prevent false positive
reports.

Signed-off-by: Alexander Potapenko <glider@google.com>

---

Link: https://linux-review.googlesource.com/id/Idb2334bf3a1b68b31b399709baefaa763038cc50
---
 crypto/Kconfig      | 30 ++++++++++++++++++++++++++++++
 drivers/net/Kconfig |  1 +
 2 files changed, 31 insertions(+)

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 41068811fd0e1..8078dbba8dd2c 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -297,6 +297,7 @@ config CRYPTO_CURVE25519
 config CRYPTO_CURVE25519_X86
 	tristate "x86_64 accelerated Curve25519 scalar multiplication library"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_LIB_CURVE25519_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_CURVE25519
 
@@ -345,11 +346,13 @@ config CRYPTO_AEGIS128
 config CRYPTO_AEGIS128_SIMD
 	bool "Support SIMD acceleration for AEGIS-128"
 	depends on CRYPTO_AEGIS128 && ((ARM || ARM64) && KERNEL_MODE_NEON)
+	depends on !KMSAN # avoid false positives from assembly
 	default y
 
 config CRYPTO_AEGIS128_AESNI_SSE2
 	tristate "AEGIS-128 AEAD algorithm (x86_64 AESNI+SSE2 implementation)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_AEAD
 	select CRYPTO_SIMD
 	help
@@ -486,6 +489,7 @@ config CRYPTO_NHPOLY1305
 config CRYPTO_NHPOLY1305_SSE2
 	tristate "NHPoly1305 hash function (x86_64 SSE2 implementation)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_NHPOLY1305
 	help
 	  SSE2 optimized implementation of the hash function used by the
@@ -494,6 +498,7 @@ config CRYPTO_NHPOLY1305_SSE2
 config CRYPTO_NHPOLY1305_AVX2
 	tristate "NHPoly1305 hash function (x86_64 AVX2 implementation)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_NHPOLY1305
 	help
 	  AVX2 optimized implementation of the hash function used by the
@@ -607,6 +612,7 @@ config CRYPTO_CRC32C
 config CRYPTO_CRC32C_INTEL
 	tristate "CRC32c INTEL hardware acceleration"
 	depends on X86
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_HASH
 	help
 	  In Intel processor with SSE4.2 supported, the processor will
@@ -647,6 +653,7 @@ config CRYPTO_CRC32
 config CRYPTO_CRC32_PCLMUL
 	tristate "CRC32 PCLMULQDQ hardware acceleration"
 	depends on X86
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_HASH
 	select CRC32
 	help
@@ -712,6 +719,7 @@ config CRYPTO_BLAKE2S
 config CRYPTO_BLAKE2S_X86
 	tristate "BLAKE2s digest algorithm (x86 accelerated version)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_LIB_BLAKE2S_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_BLAKE2S
 
@@ -726,6 +734,7 @@ config CRYPTO_CRCT10DIF
 config CRYPTO_CRCT10DIF_PCLMUL
 	tristate "CRCT10DIF PCLMULQDQ hardware acceleration"
 	depends on X86 && 64BIT && CRC_T10DIF
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_HASH
 	help
 	  For x86_64 processors with SSE4.2 and PCLMULQDQ supported,
@@ -778,6 +787,7 @@ config CRYPTO_POLY1305
 config CRYPTO_POLY1305_X86_64
 	tristate "Poly1305 authenticator algorithm (x86_64/SSE2/AVX2)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_LIB_POLY1305_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_POLY1305
 	help
@@ -866,6 +876,7 @@ config CRYPTO_SHA1
 config CRYPTO_SHA1_SSSE3
 	tristate "SHA1 digest algorithm (SSSE3/AVX/AVX2/SHA-NI)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SHA1
 	select CRYPTO_HASH
 	help
@@ -877,6 +888,7 @@ config CRYPTO_SHA1_SSSE3
 config CRYPTO_SHA256_SSSE3
 	tristate "SHA256 digest algorithm (SSSE3/AVX/AVX2/SHA-NI)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SHA256
 	select CRYPTO_HASH
 	help
@@ -889,6 +901,7 @@ config CRYPTO_SHA256_SSSE3
 config CRYPTO_SHA512_SSSE3
 	tristate "SHA512 digest algorithm (SSSE3/AVX/AVX2)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SHA512
 	select CRYPTO_HASH
 	help
@@ -1061,6 +1074,7 @@ config CRYPTO_WP512
 config CRYPTO_GHASH_CLMUL_NI_INTEL
 	tristate "GHASH hash function (CLMUL-NI accelerated)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_CRYPTD
 	help
 	  This is the x86_64 CLMUL-NI accelerated implementation of
@@ -1111,6 +1125,7 @@ config CRYPTO_AES_TI
 config CRYPTO_AES_NI_INTEL
 	tristate "AES cipher algorithms (AES-NI)"
 	depends on X86
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_AEAD
 	select CRYPTO_LIB_AES
 	select CRYPTO_ALGAPI
@@ -1235,6 +1250,7 @@ config CRYPTO_BLOWFISH_COMMON
 config CRYPTO_BLOWFISH_X86_64
 	tristate "Blowfish cipher algorithm (x86_64)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_BLOWFISH_COMMON
 	imply CRYPTO_CTR
@@ -1265,6 +1281,7 @@ config CRYPTO_CAMELLIA
 config CRYPTO_CAMELLIA_X86_64
 	tristate "Camellia cipher algorithm (x86_64)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	imply CRYPTO_CTR
 	help
@@ -1281,6 +1298,7 @@ config CRYPTO_CAMELLIA_X86_64
 config CRYPTO_CAMELLIA_AESNI_AVX_X86_64
 	tristate "Camellia cipher algorithm (x86_64/AES-NI/AVX)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_CAMELLIA_X86_64
 	select CRYPTO_SIMD
@@ -1299,6 +1317,7 @@ config CRYPTO_CAMELLIA_AESNI_AVX_X86_64
 config CRYPTO_CAMELLIA_AESNI_AVX2_X86_64
 	tristate "Camellia cipher algorithm (x86_64/AES-NI/AVX2)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_CAMELLIA_AESNI_AVX_X86_64
 	help
 	  Camellia cipher algorithm module (x86_64/AES-NI/AVX2).
@@ -1344,6 +1363,7 @@ config CRYPTO_CAST5
 config CRYPTO_CAST5_AVX_X86_64
 	tristate "CAST5 (CAST-128) cipher algorithm (x86_64/AVX)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_CAST5
 	select CRYPTO_CAST_COMMON
@@ -1367,6 +1387,7 @@ config CRYPTO_CAST6
 config CRYPTO_CAST6_AVX_X86_64
 	tristate "CAST6 (CAST-256) cipher algorithm (x86_64/AVX)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_CAST6
 	select CRYPTO_CAST_COMMON
@@ -1400,6 +1421,7 @@ config CRYPTO_DES_SPARC64
 config CRYPTO_DES3_EDE_X86_64
 	tristate "Triple DES EDE cipher algorithm (x86-64)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_LIB_DES
 	imply CRYPTO_CTR
@@ -1457,6 +1479,7 @@ config CRYPTO_CHACHA20
 config CRYPTO_CHACHA20_X86_64
 	tristate "ChaCha stream cipher algorithms (x86_64/SSSE3/AVX2/AVX-512VL)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_LIB_CHACHA_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
@@ -1500,6 +1523,7 @@ config CRYPTO_SERPENT
 config CRYPTO_SERPENT_SSE2_X86_64
 	tristate "Serpent cipher algorithm (x86_64/SSE2)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_SERPENT
 	select CRYPTO_SIMD
@@ -1519,6 +1543,7 @@ config CRYPTO_SERPENT_SSE2_X86_64
 config CRYPTO_SERPENT_SSE2_586
 	tristate "Serpent cipher algorithm (i586/SSE2)"
 	depends on X86 && !64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_SERPENT
 	select CRYPTO_SIMD
@@ -1538,6 +1563,7 @@ config CRYPTO_SERPENT_SSE2_586
 config CRYPTO_SERPENT_AVX_X86_64
 	tristate "Serpent cipher algorithm (x86_64/AVX)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_SERPENT
 	select CRYPTO_SIMD
@@ -1558,6 +1584,7 @@ config CRYPTO_SERPENT_AVX_X86_64
 config CRYPTO_SERPENT_AVX2_X86_64
 	tristate "Serpent cipher algorithm (x86_64/AVX2)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SERPENT_AVX_X86_64
 	help
 	  Serpent cipher algorithm, by Anderson, Biham & Knudsen.
@@ -1699,6 +1726,7 @@ config CRYPTO_TWOFISH_586
 config CRYPTO_TWOFISH_X86_64
 	tristate "Twofish cipher algorithm (x86_64)"
 	depends on (X86 || UML_X86) && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_ALGAPI
 	select CRYPTO_TWOFISH_COMMON
 	imply CRYPTO_CTR
@@ -1716,6 +1744,7 @@ config CRYPTO_TWOFISH_X86_64
 config CRYPTO_TWOFISH_X86_64_3WAY
 	tristate "Twofish cipher algorithm (x86_64, 3-way parallel)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_TWOFISH_COMMON
 	select CRYPTO_TWOFISH_X86_64
@@ -1736,6 +1765,7 @@ config CRYPTO_TWOFISH_X86_64_3WAY
 config CRYPTO_TWOFISH_AVX_X86_64
 	tristate "Twofish cipher algorithm (x86_64/AVX)"
 	depends on X86 && 64BIT
+	depends on !KMSAN # avoid false positives from assembly
 	select CRYPTO_SKCIPHER
 	select CRYPTO_SIMD
 	select CRYPTO_TWOFISH_COMMON
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index b2a4f998c180e..fed89b6981759 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -76,6 +76,7 @@ config WIREGUARD
 	tristate "WireGuard secure network tunnel"
 	depends on NET && INET
 	depends on IPV6 || !IPV6
+	depends on !KMSAN # KMSAN doesn't support the crypto configs below
 	select NET_UDP_TUNNEL
 	select DST_CACHE
 	select CRYPTO
-- 
2.36.0.rc2.479.g8af0fa9b8e-goog


  parent reply	other threads:[~2022-04-26 16:49 UTC|newest]

Thread overview: 81+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-26 16:42 [PATCH v3 00/46] Add KernelMemorySanitizer infrastructure Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 01/46] x86: add missing include to sparsemem.h Alexander Potapenko
2022-04-27 13:22   ` Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 02/46] stackdepot: reserve 5 extra bits in depot_stack_handle_t Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 03/46] kasan: common: adapt to the new prototype of __stack_depot_save() Alexander Potapenko
2022-04-27 12:47   ` Marco Elver
2022-04-26 16:42 ` [PATCH v3 04/46] instrumented.h: allow instrumenting both sides of copy_from_user() Alexander Potapenko
2022-04-27  4:36   ` kernel test robot
2022-06-01 17:09     ` Alexander Potapenko
2022-06-01 17:09       ` Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 05/46] x86: asm: instrument usercopy in get_user() and __put_user_size() Alexander Potapenko
2022-04-27  3:45   ` kernel test robot
2022-04-27  6:58   ` kernel test robot
2022-04-27  7:14   ` Arnd Bergmann
2022-06-02 11:20     ` Alexander Potapenko
2022-04-27 14:24   ` kernel test robot
2022-04-28  1:59   ` kernel test robot
2022-04-30 10:16   ` [x86] d216de19c8: kernel-selftests.x86.ioperm_32.fail kernel test robot
2022-04-30 10:16     ` kernel test robot
2022-04-26 16:42 ` [PATCH v3 06/46] asm-generic: instrument usercopy in cacheflush.h Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 07/46] kmsan: add ReST documentation Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 08/46] kmsan: introduce __no_sanitize_memory and __no_kmsan_checks Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 09/46] kmsan: mark noinstr as __no_sanitize_memory Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 10/46] x86: kmsan: pgtable: reduce vmalloc space Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 11/46] libnvdimm/pfn_dev: increase MAX_STRUCT_PAGE_SIZE Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 12/46] kmsan: add KMSAN runtime core Alexander Potapenko
2022-04-27  9:12   ` kernel test robot
2022-04-27 14:09   ` Marco Elver
2022-05-31 11:08     ` Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 13/46] kmsan: implement kmsan_init(), initialize READ_ONCE_NOCHECK() Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 14/46] kmsan: disable instrumentation of unsupported common kernel code Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 15/46] MAINTAINERS: add entry for KMSAN Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 16/46] kmsan: mm: maintain KMSAN metadata for page operations Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 17/46] kmsan: mm: call KMSAN hooks from SLUB code Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 18/46] kmsan: handle task creation and exiting Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 19/46] kmsan: init: call KMSAN initialization routines Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 20/46] instrumented.h: add KMSAN support Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 21/46] kmsan: unpoison @tlb in arch_tlb_gather_mmu() Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 22/46] kmsan: add iomap support Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 23/46] Input: libps2: mark data received in __ps2_command() as initialized Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 24/46] kmsan: dma: unpoison DMA mappings Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 25/46] kmsan: virtio: check/unpoison scatterlist in vring_map_one_sg() Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 26/46] kmsan: handle memory sent to/from USB Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 27/46] kmsan: instrumentation.h: add instrumentation_begin_with_regs() Alexander Potapenko
2022-04-27 13:28   ` Thomas Gleixner
2022-05-16 11:49     ` Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 28/46] kmsan: entry: handle register passing from uninstrumented code Alexander Potapenko
2022-04-27 13:32   ` Thomas Gleixner
2022-05-02 17:00     ` Alexander Potapenko
2022-05-02 22:00       ` Thomas Gleixner
2022-05-05 18:04         ` Alexander Potapenko
2022-05-05 21:56           ` Thomas Gleixner
2022-05-06 14:52             ` Alexander Potapenko
2022-05-06 16:14               ` Thomas Gleixner
2022-05-06 17:41                 ` Alexander Potapenko
2022-05-06 18:41                   ` Thomas Gleixner
2022-05-09 16:50                     ` Alexander Potapenko
2022-05-09 16:51                       ` Alexander Potapenko
2022-05-09 19:09                       ` Thomas Gleixner
2022-05-12 12:24                         ` Alexander Potapenko
2022-05-12 16:17                           ` Thomas Gleixner
2022-05-12 16:48                             ` Thomas Gleixner
2022-06-01 11:27                               ` Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 29/46] kmsan: add tests for KMSAN Alexander Potapenko
2022-04-26 16:42 ` [PATCH v3 30/46] kmsan: disable strscpy() optimization under KMSAN Alexander Potapenko
2022-04-26 16:43 ` Alexander Potapenko [this message]
2022-04-26 16:43 ` [PATCH v3 32/46] kmsan: disable physical page merging in biovec Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 33/46] kmsan: block: skip bio block merging logic for KMSAN Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 34/46] kmsan: kcov: unpoison area->list in kcov_remote_area_put() Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 35/46] security: kmsan: fix interoperability with auto-initialization Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 36/46] objtool: kmsan: list KMSAN API functions as uaccess-safe Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 37/46] x86: kmsan: make READ_ONCE_TASK_STACK() return initialized values Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 38/46] x86: kmsan: disable instrumentation of unsupported code Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 39/46] x86: kmsan: skip shadow checks in __switch_to() Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 40/46] x86: kmsan: handle open-coded assembly in lib/iomem.c Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 41/46] x86: kmsan: use __msan_ string functions where possible Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 42/46] x86: kmsan: sync metadata pages on page fault Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 43/46] x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 44/46] x86: fs: kmsan: disable CONFIG_DCACHE_WORD_ACCESS Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 45/46] x86: kmsan: handle register passing from uninstrumented code Alexander Potapenko
2022-04-26 16:43 ` [PATCH v3 46/46] x86: kmsan: enable KMSAN builds for x86 Alexander Potapenko

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