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>,
Ard Biesheuvel <ard.biesheuvel@linaro.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>,
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 05/43] asm: x86: instrument usercopy in get_user() and __put_user_size()
Date: Tue, 14 Dec 2021 17:20:12 +0100 [thread overview]
Message-ID: <20211214162050.660953-6-glider@google.com> (raw)
In-Reply-To: <20211214162050.660953-1-glider@google.com>
Use hooks from instrumented.h to notify bug detection tools about
usercopy events in get_user() and put_user_size().
It's still unclear how to instrument put_user(), which assumes that
instrumentation code doesn't clobber RAX.
Signed-off-by: Alexander Potapenko <glider@google.com>
---
Link: https://linux-review.googlesource.com/id/Ia9f12bfe5832623250e20f1859fdf5cc485a2fce
---
arch/x86/include/asm/uaccess.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 33a68407def3f..86ad5ab211e97 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -5,6 +5,7 @@
* User space memory access functions
*/
#include <linux/compiler.h>
+#include <linux/instrumented.h>
#include <linux/kasan-checks.h>
#include <linux/string.h>
#include <asm/asm.h>
@@ -126,11 +127,13 @@ extern int __get_user_bad(void);
int __ret_gu; \
register __inttype(*(ptr)) __val_gu asm("%"_ASM_DX); \
__chk_user_ptr(ptr); \
+ instrument_copy_from_user_before((void *)&(x), ptr, sizeof(*(ptr))); \
asm volatile("call __" #fn "_%P4" \
: "=a" (__ret_gu), "=r" (__val_gu), \
ASM_CALL_CONSTRAINT \
: "0" (ptr), "i" (sizeof(*(ptr)))); \
(x) = (__force __typeof__(*(ptr))) __val_gu; \
+ instrument_copy_from_user_after((void *)&(x), ptr, sizeof(*(ptr)), 0); \
__builtin_expect(__ret_gu, 0); \
})
@@ -275,7 +278,9 @@ extern void __put_user_nocheck_8(void);
#define __put_user_size(x, ptr, size, label) \
do { \
+ __typeof__(*(ptr)) __pus_val = x; \
__chk_user_ptr(ptr); \
+ instrument_copy_to_user(ptr, &(__pus_val), size); \
switch (size) { \
case 1: \
__put_user_goto(x, ptr, "b", "iq", label); \
@@ -313,6 +318,7 @@ do { \
#define __get_user_size(x, ptr, size, label) \
do { \
__chk_user_ptr(ptr); \
+ instrument_copy_from_user_before((void *)&(x), ptr, size); \
switch (size) { \
unsigned char x_u8__; \
case 1: \
@@ -331,6 +337,7 @@ do { \
default: \
(x) = __get_user_bad(); \
} \
+ instrument_copy_from_user_after((void *)&(x), ptr, size, 0); \
} while (0)
#define __get_user_asm(x, addr, itype, ltype, label) \
--
2.34.1.173.g76aa8bc2d0-goog
next prev parent reply other threads:[~2021-12-14 16:22 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-14 16:20 [PATCH 00/43] Add KernelMemorySanitizer infrastructure Alexander Potapenko
2021-12-14 16:20 ` [PATCH 01/43] arch/x86: add missing include to sparsemem.h Alexander Potapenko
2021-12-14 16:20 ` [PATCH 02/43] stackdepot: reserve 5 extra bits in depot_stack_handle_t Alexander Potapenko
2021-12-14 16:20 ` [PATCH 03/43] kasan: common: adapt to the new prototype of __stack_depot_save() Alexander Potapenko
2021-12-14 16:20 ` [PATCH 04/43] instrumented.h: allow instrumenting both sides of copy_from_user() Alexander Potapenko
2021-12-14 16:20 ` Alexander Potapenko [this message]
2021-12-14 16:20 ` [PATCH 06/43] asm-generic: instrument usercopy in cacheflush.h Alexander Potapenko
2021-12-14 16:20 ` [PATCH 07/43] compiler_attributes.h: add __disable_sanitizer_instrumentation Alexander Potapenko
2021-12-15 13:24 ` Mark Rutland
2021-12-15 13:33 ` Marco Elver
2021-12-14 16:20 ` [PATCH 08/43] kmsan: add ReST documentation Alexander Potapenko
2021-12-14 16:20 ` [PATCH 09/43] kmsan: introduce __no_sanitize_memory and __no_kmsan_checks Alexander Potapenko
2021-12-15 13:27 ` Mark Rutland
2021-12-14 16:20 ` [PATCH 10/43] kmsan: pgtable: reduce vmalloc space Alexander Potapenko
2021-12-15 13:36 ` Mark Rutland
2022-03-18 14:14 ` Alexander Potapenko
2021-12-14 16:20 ` [PATCH 11/43] libnvdimm/pfn_dev: increase MAX_STRUCT_PAGE_SIZE Alexander Potapenko
2021-12-14 16:20 ` [PATCH 12/43] kcsan: clang: retire CONFIG_KCSAN_KCOV_BROKEN Alexander Potapenko
2021-12-15 13:33 ` Mark Rutland
2021-12-15 13:39 ` Marco Elver
2021-12-15 14:43 ` Mark Rutland
2022-03-18 14:34 ` Alexander Potapenko
2021-12-14 16:20 ` [PATCH 13/43] kmsan: add KMSAN runtime core Alexander Potapenko
2021-12-14 16:34 ` Greg Kroah-Hartman
2021-12-16 10:33 ` Alexander Potapenko
2021-12-17 16:22 ` Greg Kroah-Hartman
2022-03-21 14:12 ` Alexander Potapenko
2022-01-03 16:27 ` Dmitry Vyukov
2022-03-21 13:17 ` Alexander Potapenko
2021-12-14 16:20 ` [PATCH 14/43] MAINTAINERS: add entry for KMSAN Alexander Potapenko
2021-12-14 16:20 ` [PATCH 15/43] kmsan: mm: maintain KMSAN metadata for page operations Alexander Potapenko
2021-12-14 16:20 ` [PATCH 16/43] kmsan: mm: call KMSAN hooks from SLUB code Alexander Potapenko
2022-01-07 17:22 ` Vlastimil Babka
2022-03-25 13:15 ` Alexander Potapenko
2021-12-14 16:20 ` [PATCH 17/43] kmsan: handle task creation and exiting Alexander Potapenko
2021-12-14 16:20 ` [PATCH 18/43] kmsan: unpoison @tlb in arch_tlb_gather_mmu() Alexander Potapenko
2021-12-14 16:20 ` [PATCH 19/43] kmsan: init: call KMSAN initialization routines Alexander Potapenko
2021-12-14 16:20 ` [PATCH 20/43] instrumented.h: add KMSAN support Alexander Potapenko
2021-12-14 16:20 ` [PATCH 21/43] kmsan: mark noinstr as __no_sanitize_memory Alexander Potapenko
2021-12-15 13:49 ` Mark Rutland
2021-12-14 16:20 ` [PATCH 22/43] kmsan: initialize the output of READ_ONCE_NOCHECK() Alexander Potapenko
2021-12-14 16:20 ` [PATCH 23/43] kmsan: make READ_ONCE_TASK_STACK() return initialized values Alexander Potapenko
2021-12-14 16:20 ` [PATCH 24/43] kmsan: disable KMSAN instrumentation for certain kernel parts Alexander Potapenko
2021-12-15 13:53 ` Mark Rutland
2021-12-14 16:20 ` [PATCH 25/43] kmsan: skip shadow checks in files doing context switches Alexander Potapenko
2021-12-15 14:13 ` Mark Rutland
2021-12-15 16:28 ` Alexander Potapenko
2021-12-15 17:22 ` Mark Rutland
2021-12-14 16:20 ` [PATCH 26/43] kmsan: virtio: check/unpoison scatterlist in vring_map_one_sg() Alexander Potapenko
2022-01-06 12:46 ` Michael S. Tsirkin
2021-12-14 16:20 ` [PATCH 27/43] x86: kmsan: add iomem support Alexander Potapenko
2021-12-14 16:20 ` [PATCH 28/43] kmsan: dma: unpoison DMA mappings Alexander Potapenko
2021-12-14 16:20 ` [PATCH 29/43] kmsan: handle memory sent to/from USB Alexander Potapenko
2021-12-14 16:20 ` [PATCH 30/43] kmsan: add tests for KMSAN Alexander Potapenko
2021-12-14 16:20 ` [PATCH 31/43] kmsan: disable strscpy() optimization under KMSAN Alexander Potapenko
2021-12-14 16:20 ` [PATCH 32/43] crypto: kmsan: disable accelerated configs " Alexander Potapenko
2021-12-14 16:20 ` [PATCH 33/43] kmsan: disable physical page merging in biovec Alexander Potapenko
2021-12-15 14:17 ` Mark Rutland
2021-12-15 16:30 ` Alexander Potapenko
2021-12-14 16:20 ` [PATCH 34/43] kmsan: block: skip bio block merging logic for KMSAN Alexander Potapenko
2021-12-14 16:20 ` [PATCH 35/43] x86: kmsan: use __msan_ string functions where possible Alexander Potapenko
2021-12-14 16:20 ` [PATCH 36/43] x86: kmsan: sync metadata pages on page fault Alexander Potapenko
2021-12-14 16:20 ` [PATCH 37/43] x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN Alexander Potapenko
2021-12-14 16:20 ` [PATCH 38/43] x86: fs: kmsan: disable CONFIG_DCACHE_WORD_ACCESS Alexander Potapenko
2021-12-14 16:20 ` [PATCH 39/43] x86: kmsan: handle register passing from uninstrumented code Alexander Potapenko
2021-12-17 21:51 ` Thomas Gleixner
2021-12-20 14:35 ` Alexander Potapenko
2021-12-14 16:20 ` [PATCH 40/43] kmsan: kcov: unpoison area->list in kcov_remote_area_put() Alexander Potapenko
2021-12-14 16:20 ` [PATCH 41/43] security: kmsan: fix interoperability with auto-initialization Alexander Potapenko
2021-12-14 16:38 ` Greg Kroah-Hartman
2021-12-14 17:00 ` Alexander Potapenko
2021-12-14 17:33 ` Greg Kroah-Hartman
2021-12-14 16:20 ` [PATCH 42/43] objtool: kmsan: list KMSAN API functions as uaccess-safe Alexander Potapenko
2021-12-14 16:20 ` [PATCH 43/43] x86: kmsan: enable KMSAN builds for x86 Alexander Potapenko
2021-12-14 16:36 ` [PATCH 00/43] Add KernelMemorySanitizer infrastructure Greg Kroah-Hartman
2021-12-16 10:12 ` Alexander Potapenko
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