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subr_msan.c
1609 lines (1395 loc) · 43.3 KB
/
subr_msan.c
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/* $NetBSD: subr_msan.c,v 1.19 2023/04/11 10:19:56 riastradh Exp $ */
/*
* Copyright (c) 2019-2020 Maxime Villard, m00nbsd.net
* All rights reserved.
*
* This code is part of the KMSAN subsystem of the NetBSD kernel.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_msan.c,v 1.19 2023/04/11 10:19:56 riastradh Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/kprintf.h>
#include <sys/kmem.h>
#include <sys/mbuf.h>
#include <sys/buf.h>
#include <sys/cpu.h>
#include <sys/msan.h>
#include <ddb/db_active.h>
static void kmsan_printf(const char *, ...);
void kmsan_init_arg(size_t);
void kmsan_init_ret(size_t);
#ifdef KMSAN_PANIC
#define REPORT panic
#else
#define REPORT kmsan_printf
#endif
/* -------------------------------------------------------------------------- */
/*
* Part of the compiler ABI.
*/
typedef uint32_t msan_orig_t;
typedef struct {
uint8_t *shad;
msan_orig_t *orig;
} msan_meta_t;
#define MSAN_PARAM_SIZE 800
#define MSAN_RETVAL_SIZE 800
typedef struct {
uint8_t param[MSAN_PARAM_SIZE];
uint8_t retval[MSAN_RETVAL_SIZE];
uint8_t _va_arg[MSAN_PARAM_SIZE];
uint8_t va_arg_origin[MSAN_PARAM_SIZE];
uint64_t va_arg_overflow_size;
msan_orig_t param_origin[MSAN_PARAM_SIZE];
msan_orig_t retval_origin;
msan_orig_t origin;
} msan_tls_t;
/* -------------------------------------------------------------------------- */
/* The MD code. */
#include <machine/msan.h>
/* -------------------------------------------------------------------------- */
#define __RET_ADDR (uintptr_t)__builtin_return_address(0)
#define MSAN_NCONTEXT 16
typedef struct {
size_t ctx;
msan_tls_t tls[MSAN_NCONTEXT];
} msan_lwp_t;
static msan_tls_t dummy_tls;
static uint8_t msan_dummy_shad[PAGE_SIZE] __aligned(PAGE_SIZE);
static uint8_t msan_dummy_orig[PAGE_SIZE] __aligned(PAGE_SIZE);
static msan_lwp_t msan_lwp0;
static bool kmsan_enabled __read_mostly;
/* -------------------------------------------------------------------------- */
static bool kmsan_reporting = false;
static inline void
kmsan_printf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
kprintf(fmt, TOCONS, NULL, NULL, ap);
va_end(ap);
}
static inline const char *
kmsan_orig_name(int type)
{
switch (type) {
case KMSAN_TYPE_STACK:
return "Stack";
case KMSAN_TYPE_KMEM:
return "Kmem";
case KMSAN_TYPE_MALLOC:
return "Malloc";
case KMSAN_TYPE_POOL:
return "Pool";
case KMSAN_TYPE_UVM:
return "Uvm";
default:
return "Unknown";
}
}
/*
* The format of the string is: "----var@function". Parse it to display a nice
* warning.
*/
static void
kmsan_report_hook(const void *addr, size_t size, size_t off, const char *hook)
{
unsigned long symstart;
const char *mod, *sym;
msan_orig_t *orig;
const char *typename;
char *var, *fn;
uintptr_t ptr;
char buf[128];
int type;
int s;
if (__predict_false(panicstr != NULL || db_active || kmsan_reporting))
return;
kmsan_reporting = true;
__insn_barrier();
orig = (msan_orig_t *)kmsan_md_addr_to_orig(addr);
orig = (msan_orig_t *)((uintptr_t)orig & ~0x3);
if (*orig == 0) {
REPORT("MSan: Uninitialized Memory In %s At Offset "
"%zu\n", hook, off);
goto out;
}
kmsan_md_orig_decode(*orig, &type, &ptr);
typename = kmsan_orig_name(type);
if (kmsan_md_is_pc(ptr)) {
s = pserialize_read_enter();
if (ksyms_getname(&mod, &sym, (vaddr_t)ptr, KSYMS_PROC) ||
ksyms_getval(mod, sym, &symstart, KSYMS_PROC)) {
REPORT("MSan: Uninitialized %s Memory In %s "
"At Offset %zu/%zu, IP %p\n", typename, hook, off,
size, (void *)ptr);
} else {
char soff[16] = "";
if ((vaddr_t)ptr < symstart) {
snprintf(soff, sizeof(soff), "-0x%"PRIxVADDR,
symstart - (vaddr_t)ptr);
} else if ((vaddr_t)ptr > symstart) {
snprintf(soff, sizeof(soff), "+0x%"PRIxVADDR,
(vaddr_t)ptr - symstart);
}
REPORT("MSan: Uninitialized %s Memory In %s "
"At Offset %zu/%zu, From %s%s%lx\n",
typename, hook,
off, size, sym,
((unsigned long)ptr < symstart ? "-" :
(unsigned long)ptr > symstart ? "+" :
""),
(unsigned long)ptr - symstart);
}
pserialize_read_exit(s);
} else {
var = (char *)ptr + 4;
strlcpy(buf, var, sizeof(buf));
var = buf;
fn = __builtin_strchr(buf, '@');
*fn++ = '\0';
REPORT("MSan: Uninitialized %s Memory In %s At Offset "
"%zu, Variable '%s' From %s()\n", typename, hook, off,
var, fn);
}
out:
kmsan_md_unwind();
__insn_barrier();
kmsan_reporting = false;
}
static void
kmsan_report_inline(msan_orig_t orig, unsigned long pc)
{
const char *mod, *sym;
const char *typename;
char *var, *fn;
uintptr_t ptr;
char buf[128];
int type;
int s;
if (__predict_false(panicstr != NULL || db_active || kmsan_reporting))
return;
kmsan_reporting = true;
__insn_barrier();
if (orig == 0) {
REPORT("MSan: Uninitialized Variable In %p\n",
(void *)pc);
goto out;
}
kmsan_md_orig_decode(orig, &type, &ptr);
typename = kmsan_orig_name(type);
if (kmsan_md_is_pc(ptr)) {
s = pserialize_read_enter();
if (ksyms_getname(&mod, &sym, (vaddr_t)ptr, KSYMS_PROC)) {
REPORT("MSan: Uninitialized %s Memory, "
"Origin %x\n", typename, orig);
} else {
REPORT("MSan: Uninitialized %s Memory "
"From %s()\n", typename, sym);
}
pserialize_read_exit(s);
} else {
var = (char *)ptr + 4;
strlcpy(buf, var, sizeof(buf));
var = buf;
fn = __builtin_strchr(buf, '@');
*fn++ = '\0';
REPORT("MSan: Uninitialized Variable '%s' From %s()\n",
var, fn);
}
out:
kmsan_md_unwind();
__insn_barrier();
kmsan_reporting = false;
}
/* -------------------------------------------------------------------------- */
static inline msan_meta_t
kmsan_meta_get(void *addr, size_t size)
{
msan_meta_t ret;
if (__predict_false(!kmsan_enabled)) {
ret.shad = msan_dummy_shad;
ret.orig = (msan_orig_t *)msan_dummy_orig;
} else if (__predict_false(kmsan_md_unsupported((vaddr_t)addr))) {
ret.shad = msan_dummy_shad;
ret.orig = (msan_orig_t *)msan_dummy_orig;
} else {
ret.shad = (void *)kmsan_md_addr_to_shad(addr);
ret.orig = (msan_orig_t *)kmsan_md_addr_to_orig(addr);
ret.orig = (msan_orig_t *)((uintptr_t)ret.orig & ~0x3);
}
return ret;
}
static inline void
kmsan_origin_fill(void *addr, msan_orig_t o, size_t size)
{
msan_orig_t *orig;
size_t i;
if (__predict_false(!kmsan_enabled))
return;
if (__predict_false(kmsan_md_unsupported((vaddr_t)addr)))
return;
orig = (msan_orig_t *)kmsan_md_addr_to_orig(addr);
size += ((uintptr_t)orig & 0x3);
orig = (msan_orig_t *)((uintptr_t)orig & ~0x3);
for (i = 0; i < size; i += 4) {
orig[i / 4] = o;
}
}
static inline void
kmsan_shadow_fill(void *addr, uint8_t c, size_t size)
{
uint8_t *shad;
if (__predict_false(!kmsan_enabled))
return;
if (__predict_false(kmsan_md_unsupported((vaddr_t)addr)))
return;
shad = kmsan_md_addr_to_shad(addr);
__builtin_memset(shad, c, size);
}
static inline void
kmsan_meta_copy(void *dst, const void *src, size_t size)
{
uint8_t *orig_src, *orig_dst;
uint8_t *shad_src, *shad_dst;
msan_orig_t *_src, *_dst;
size_t i;
if (__predict_false(!kmsan_enabled))
return;
if (__predict_false(kmsan_md_unsupported((vaddr_t)dst)))
return;
if (__predict_false(kmsan_md_unsupported((vaddr_t)src))) {
kmsan_shadow_fill(dst, KMSAN_STATE_INITED, size);
return;
}
shad_src = kmsan_md_addr_to_shad(src);
shad_dst = kmsan_md_addr_to_shad(dst);
__builtin_memmove(shad_dst, shad_src, size);
orig_src = kmsan_md_addr_to_orig(src);
orig_dst = kmsan_md_addr_to_orig(dst);
for (i = 0; i < size; i++) {
_src = (msan_orig_t *)((uintptr_t)orig_src & ~0x3);
_dst = (msan_orig_t *)((uintptr_t)orig_dst & ~0x3);
*_dst = *_src;
orig_src++;
orig_dst++;
}
}
static inline void
kmsan_shadow_check(const void *addr, size_t size, const char *hook)
{
uint8_t *shad;
size_t i;
if (__predict_false(!kmsan_enabled))
return;
if (__predict_false(kmsan_md_unsupported((vaddr_t)addr)))
return;
shad = kmsan_md_addr_to_shad(addr);
for (i = 0; i < size; i++) {
if (__predict_true(shad[i] == 0))
continue;
kmsan_report_hook((const char *)addr + i, size, i, hook);
break;
}
}
void
kmsan_init_arg(size_t n)
{
msan_lwp_t *lwp;
uint8_t *arg;
if (__predict_false(!kmsan_enabled))
return;
lwp = curlwp->l_kmsan;
arg = lwp->tls[lwp->ctx].param;
__builtin_memset(arg, 0, n);
}
void
kmsan_init_ret(size_t n)
{
msan_lwp_t *lwp;
uint8_t *arg;
if (__predict_false(!kmsan_enabled))
return;
lwp = curlwp->l_kmsan;
arg = lwp->tls[lwp->ctx].retval;
__builtin_memset(arg, 0, n);
}
static void
kmsan_check_arg(size_t size, const char *hook)
{
msan_lwp_t *lwp;
uint8_t *arg;
size_t i;
if (__predict_false(!kmsan_enabled))
return;
lwp = curlwp->l_kmsan;
arg = lwp->tls[lwp->ctx].param;
for (i = 0; i < size; i++) {
if (__predict_true(arg[i] == 0))
continue;
kmsan_report_hook((const char *)arg + i, size, i, hook);
break;
}
}
void
kmsan_lwp_alloc(struct lwp *l)
{
msan_lwp_t *lwp;
kmsan_init_arg(sizeof(size_t) + sizeof(km_flag_t));
lwp = kmem_zalloc(sizeof(msan_lwp_t), KM_SLEEP);
lwp->ctx = 1;
l->l_kmsan = lwp;
}
void
kmsan_lwp_free(struct lwp *l)
{
kmsan_init_arg(sizeof(void *) + sizeof(size_t));
kmem_free(l->l_kmsan, sizeof(msan_lwp_t));
}
void kmsan_intr_enter(void);
void kmsan_intr_leave(void);
void kmsan_softint(struct lwp *);
void
kmsan_intr_enter(void)
{
msan_lwp_t *lwp;
if (__predict_false(!kmsan_enabled))
return;
lwp = curlwp->l_kmsan;
lwp->ctx++;
if (__predict_false(lwp->ctx >= MSAN_NCONTEXT)) {
kmsan_enabled = false;
panic("%s: lwp->ctx = %zu", __func__, lwp->ctx);
}
kmsan_init_arg(sizeof(void *));
}
void
kmsan_intr_leave(void)
{
msan_lwp_t *lwp;
if (__predict_false(!kmsan_enabled))
return;
lwp = curlwp->l_kmsan;
if (__predict_false(lwp->ctx == 0)) {
kmsan_enabled = false;
panic("%s: lwp->ctx = %zu", __func__, lwp->ctx);
}
lwp->ctx--;
}
void
kmsan_softint(struct lwp *l)
{
kmsan_init_arg(sizeof(lwp_t *) + sizeof(int));
}
/* -------------------------------------------------------------------------- */
void
kmsan_shadow_map(void *addr, size_t size)
{
size_t npages, i;
vaddr_t va;
KASSERT((vaddr_t)addr % PAGE_SIZE == 0);
KASSERT(size % PAGE_SIZE == 0);
npages = size / PAGE_SIZE;
va = (vaddr_t)kmsan_md_addr_to_shad(addr);
for (i = 0; i < npages; i++) {
kmsan_md_shadow_map_page(va + i * PAGE_SIZE);
}
va = (vaddr_t)kmsan_md_addr_to_orig(addr);
for (i = 0; i < npages; i++) {
kmsan_md_shadow_map_page(va + i * PAGE_SIZE);
}
}
void
kmsan_orig(void *addr, size_t size, int type, uintptr_t pc)
{
msan_orig_t orig;
orig = kmsan_md_orig_encode(type, pc);
kmsan_origin_fill(addr, orig, size);
}
void
kmsan_mark(void *addr, size_t size, uint8_t c)
{
kmsan_shadow_fill(addr, c, size);
}
void
kmsan_check_mbuf(void *buf)
{
struct mbuf *m = buf;
do {
kmsan_shadow_check(mtod(m, void *), m->m_len, "MbufChain");
} while ((m = m->m_next) != NULL);
}
void
kmsan_check_buf(void *buf)
{
buf_t *bp = buf;
kmsan_shadow_check(bp->b_data, bp->b_bcount, "bwrite()");
}
void
kmsan_init(void *stack)
{
/* MD initialization. */
kmsan_md_init();
/* Map the stack. */
kmsan_shadow_map(stack, USPACE);
/* Initialize the TLS for curlwp. */
msan_lwp0.ctx = 1;
curlwp->l_kmsan = &msan_lwp0;
/* Now officially enabled. */
kmsan_enabled = true;
}
/* -------------------------------------------------------------------------- */
msan_meta_t __msan_metadata_ptr_for_load_n(void *, size_t);
msan_meta_t __msan_metadata_ptr_for_store_n(void *, size_t);
msan_meta_t __msan_metadata_ptr_for_load_n(void *addr, size_t size)
{
return kmsan_meta_get(addr, size);
}
msan_meta_t __msan_metadata_ptr_for_store_n(void *addr, size_t size)
{
return kmsan_meta_get(addr, size);
}
#define MSAN_META_FUNC(size) \
msan_meta_t __msan_metadata_ptr_for_load_##size(void *); \
msan_meta_t __msan_metadata_ptr_for_load_##size(void *addr) \
{ \
return kmsan_meta_get(addr, size); \
} \
msan_meta_t __msan_metadata_ptr_for_store_##size(void *); \
msan_meta_t __msan_metadata_ptr_for_store_##size(void *addr) \
{ \
return kmsan_meta_get(addr, size); \
}
MSAN_META_FUNC(1)
MSAN_META_FUNC(2)
MSAN_META_FUNC(4)
MSAN_META_FUNC(8)
void __msan_instrument_asm_store(void *, size_t);
msan_orig_t __msan_chain_origin(msan_orig_t);
void __msan_poison_alloca(void *, uint64_t, char *);
void __msan_unpoison_alloca(void *, uint64_t);
void __msan_warning(msan_orig_t);
msan_tls_t *__msan_get_context_state(void);
void __msan_instrument_asm_store(void *addr, size_t size)
{
kmsan_shadow_fill(addr, KMSAN_STATE_INITED, size);
}
msan_orig_t __msan_chain_origin(msan_orig_t origin)
{
return origin;
}
void __msan_poison_alloca(void *addr, uint64_t size, char *descr)
{
msan_orig_t orig;
orig = kmsan_md_orig_encode(KMSAN_TYPE_STACK, (uintptr_t)descr);
kmsan_origin_fill(addr, orig, size);
kmsan_shadow_fill(addr, KMSAN_STATE_UNINIT, size);
}
void __msan_unpoison_alloca(void *addr, uint64_t size)
{
kmsan_shadow_fill(addr, KMSAN_STATE_INITED, size);
}
void __msan_warning(msan_orig_t origin)
{
if (__predict_false(!kmsan_enabled))
return;
kmsan_report_inline(origin, __RET_ADDR);
}
msan_tls_t *__msan_get_context_state(void)
{
msan_lwp_t *lwp;
if (__predict_false(!kmsan_enabled))
return &dummy_tls;
lwp = curlwp->l_kmsan;
return &lwp->tls[lwp->ctx];
}
/* -------------------------------------------------------------------------- */
/*
* Function hooks. Mostly ASM functions which need KMSAN wrappers to handle
* initialized areas properly.
*/
void *kmsan_memcpy(void *dst, const void *src, size_t len)
{
/* No kmsan_check_arg, because inlined. */
kmsan_init_ret(sizeof(void *));
if (__predict_true(len != 0)) {
kmsan_meta_copy(dst, src, len);
}
return __builtin_memcpy(dst, src, len);
}
int
kmsan_memcmp(const void *b1, const void *b2, size_t len)
{
const uint8_t *_b1 = b1, *_b2 = b2;
size_t i;
kmsan_check_arg(sizeof(b1) + sizeof(b2) + sizeof(len),
"memcmp():args");
kmsan_init_ret(sizeof(int));
for (i = 0; i < len; i++) {
if (*_b1 != *_b2) {
kmsan_shadow_check(b1, i + 1, "memcmp():arg1");
kmsan_shadow_check(b2, i + 1, "memcmp():arg2");
return *_b1 - *_b2;
}
_b1++, _b2++;
}
return 0;
}
void *kmsan_memset(void *dst, int c, size_t len)
{
/* No kmsan_check_arg, because inlined. */
kmsan_shadow_fill(dst, KMSAN_STATE_INITED, len);
kmsan_init_ret(sizeof(void *));
return __builtin_memset(dst, c, len);
}
void *kmsan_memmove(void *dst, const void *src, size_t len)
{
/* No kmsan_check_arg, because inlined. */
if (__predict_true(len != 0)) {
kmsan_meta_copy(dst, src, len);
}
kmsan_init_ret(sizeof(void *));
return __builtin_memmove(dst, src, len);
}
__strong_alias(__msan_memcpy, kmsan_memcpy)
__strong_alias(__msan_memset, kmsan_memset)
__strong_alias(__msan_memmove, kmsan_memmove)
char *
kmsan_strcpy(char *dst, const char *src)
{
const char *_src = src;
char *_dst = dst;
size_t len = 0;
kmsan_check_arg(sizeof(dst) + sizeof(src), "strcpy():args");
while (1) {
len++;
*dst = *src;
if (*src == '\0')
break;
src++, dst++;
}
kmsan_shadow_check(_src, len, "strcpy():arg2");
kmsan_shadow_fill(_dst, KMSAN_STATE_INITED, len);
kmsan_init_ret(sizeof(char *));
return _dst;
}
int
kmsan_strcmp(const char *s1, const char *s2)
{
const char *_s1 = s1, *_s2 = s2;
size_t len = 0;
kmsan_check_arg(sizeof(s1) + sizeof(s2), "strcmp():args");
kmsan_init_ret(sizeof(int));
while (1) {
len++;
if (*s1 != *s2)
break;
if (*s1 == '\0') {
kmsan_shadow_check(_s1, len, "strcmp():arg1");
kmsan_shadow_check(_s2, len, "strcmp():arg2");
return 0;
}
s1++, s2++;
}
kmsan_shadow_check(_s1, len, "strcmp():arg1");
kmsan_shadow_check(_s2, len, "strcmp():arg2");
return (*(const unsigned char *)s1 - *(const unsigned char *)s2);
}
size_t
kmsan_strlen(const char *str)
{
const char *s;
kmsan_check_arg(sizeof(str), "strlen():args");
s = str;
while (1) {
if (*s == '\0')
break;
s++;
}
kmsan_shadow_check(str, (size_t)(s - str) + 1, "strlen():arg1");
kmsan_init_ret(sizeof(size_t));
return (s - str);
}
char *
kmsan_strcat(char *dst, const char *src)
{
size_t ldst, lsrc;
char *ret;
kmsan_check_arg(sizeof(dst) + sizeof(src), "strcat():args");
ldst = __builtin_strlen(dst);
lsrc = __builtin_strlen(src);
kmsan_shadow_check(dst, ldst + 1, "strcat():arg1");
kmsan_shadow_check(src, lsrc + 1, "strcat():arg2");
ret = __builtin_strcat(dst, src);
kmsan_shadow_fill(dst, KMSAN_STATE_INITED, ldst + lsrc + 1);
kmsan_init_ret(sizeof(char *));
return ret;
}
char *
kmsan_strchr(const char *s, int c)
{
char *ret;
kmsan_check_arg(sizeof(s) + sizeof(c), "strchr():args");
kmsan_shadow_check(s, __builtin_strlen(s) + 1, "strchr():arg1");
ret = __builtin_strchr(s, c);
kmsan_init_ret(sizeof(char *));
return ret;
}
char *
kmsan_strrchr(const char *s, int c)
{
char *ret;
kmsan_check_arg(sizeof(s) + sizeof(c), "strrchr():args");
kmsan_shadow_check(s, __builtin_strlen(s) + 1, "strrchr():arg1");
ret = __builtin_strrchr(s, c);
kmsan_init_ret(sizeof(char *));
return ret;
}
#undef kcopy
#undef copyin
#undef copyout
#undef copyinstr
#undef copyoutstr
int kmsan_kcopy(const void *, void *, size_t);
int kmsan_copyin(const void *, void *, size_t);
int kmsan_copyout(const void *, void *, size_t);
int kmsan_copyinstr(const void *, void *, size_t, size_t *);
int kmsan_copyoutstr(const void *, void *, size_t, size_t *);
int kcopy(const void *, void *, size_t);
int copyin(const void *, void *, size_t);
int copyout(const void *, void *, size_t);
int copyinstr(const void *, void *, size_t, size_t *);
int copyoutstr(const void *, void *, size_t, size_t *);
int
kmsan_kcopy(const void *src, void *dst, size_t len)
{
kmsan_check_arg(sizeof(src) + sizeof(dst) + sizeof(len),
"kcopy():args");
if (__predict_true(len != 0)) {
kmsan_meta_copy(dst, src, len);
}
kmsan_init_ret(sizeof(int));
return kcopy(src, dst, len);
}
int
kmsan_copyin(const void *uaddr, void *kaddr, size_t len)
{
int ret;
kmsan_check_arg(sizeof(uaddr) + sizeof(kaddr) + sizeof(len),
"copyin():args");
ret = copyin(uaddr, kaddr, len);
if (ret == 0)
kmsan_shadow_fill(kaddr, KMSAN_STATE_INITED, len);
kmsan_init_ret(sizeof(int));
return ret;
}
int
kmsan_copyout(const void *kaddr, void *uaddr, size_t len)
{
kmsan_check_arg(sizeof(kaddr) + sizeof(uaddr) + sizeof(len),
"copyout():args");
kmsan_shadow_check(kaddr, len, "copyout():arg1");
kmsan_init_ret(sizeof(int));
return copyout(kaddr, uaddr, len);
}
int
kmsan_copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done)
{
size_t _done;
int ret;
kmsan_check_arg(sizeof(uaddr) + sizeof(kaddr) +
sizeof(len) + sizeof(done), "copyinstr():args");
ret = copyinstr(uaddr, kaddr, len, &_done);
if (ret == 0 || ret == ENAMETOOLONG)
kmsan_shadow_fill(kaddr, KMSAN_STATE_INITED, _done);
if (done != NULL) {
*done = _done;
kmsan_shadow_fill(done, KMSAN_STATE_INITED, sizeof(size_t));
}
kmsan_init_ret(sizeof(int));
return ret;
}
int
kmsan_copyoutstr(const void *kaddr, void *uaddr, size_t len, size_t *done)
{
size_t _done;
int ret;
kmsan_check_arg(sizeof(kaddr) + sizeof(uaddr) +
sizeof(len) + sizeof(done), "copyoutstr():args");
ret = copyoutstr(kaddr, uaddr, len, &_done);
kmsan_shadow_check(kaddr, _done, "copyoutstr():arg1");
if (done != NULL) {
*done = _done;
kmsan_shadow_fill(done, KMSAN_STATE_INITED, sizeof(size_t));
}
kmsan_init_ret(sizeof(int));
return ret;
}
/* -------------------------------------------------------------------------- */
#undef _ucas_32
#undef _ucas_32_mp
#undef _ucas_64
#undef _ucas_64_mp
#undef _ufetch_8
#undef _ufetch_16
#undef _ufetch_32
#undef _ufetch_64
#undef _ustore_8
#undef _ustore_16
#undef _ustore_32
#undef _ustore_64
int _ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
int kmsan__ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
int
kmsan__ucas_32(volatile uint32_t *uaddr, uint32_t old, uint32_t new,
uint32_t *ret)
{
int _ret;
kmsan_check_arg(sizeof(uaddr) + sizeof(old) +
sizeof(new) + sizeof(ret), "ucas_32():args");
_ret = _ucas_32(uaddr, old, new, ret);
if (_ret == 0)
kmsan_shadow_fill(ret, KMSAN_STATE_INITED, sizeof(*ret));
kmsan_init_ret(sizeof(int));
return _ret;
}
#ifdef __HAVE_UCAS_MP
int _ucas_32_mp(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
int kmsan__ucas_32_mp(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
int
kmsan__ucas_32_mp(volatile uint32_t *uaddr, uint32_t old, uint32_t new,
uint32_t *ret)
{
int _ret;
kmsan_check_arg(sizeof(uaddr) + sizeof(old) +
sizeof(new) + sizeof(ret), "ucas_32_mp():args");
_ret = _ucas_32_mp(uaddr, old, new, ret);
if (_ret == 0)
kmsan_shadow_fill(ret, KMSAN_STATE_INITED, sizeof(*ret));
kmsan_init_ret(sizeof(int));
return _ret;
}
#endif
#ifdef _LP64
int _ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
int kmsan__ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
int
kmsan__ucas_64(volatile uint64_t *uaddr, uint64_t old, uint64_t new,
uint64_t *ret)
{
int _ret;
kmsan_check_arg(sizeof(uaddr) + sizeof(old) +
sizeof(new) + sizeof(ret), "ucas_64():args");
_ret = _ucas_64(uaddr, old, new, ret);
if (_ret == 0)
kmsan_shadow_fill(ret, KMSAN_STATE_INITED, sizeof(*ret));
kmsan_init_ret(sizeof(int));
return _ret;
}
#ifdef __HAVE_UCAS_MP
int _ucas_64_mp(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
int kmsan__ucas_64_mp(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
int
kmsan__ucas_64_mp(volatile uint64_t *uaddr, uint64_t old, uint64_t new,
uint64_t *ret)
{
int _ret;
kmsan_check_arg(sizeof(uaddr) + sizeof(old) +
sizeof(new) + sizeof(ret), "ucas_64_mp():args");
_ret = _ucas_64_mp(uaddr, old, new, ret);
if (_ret == 0)
kmsan_shadow_fill(ret, KMSAN_STATE_INITED, sizeof(*ret));
kmsan_init_ret(sizeof(int));
return _ret;
}
#endif
#endif
int _ufetch_8(const uint8_t *, uint8_t *);
int kmsan__ufetch_8(const uint8_t *, uint8_t *);