mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
58823a9b09
commit 69d0db01e2 upstream.
The object-size sanitizer is redundant to -Warray-bounds, and
inappropriately performs its checks at run-time when all information
needed for the evaluation is available at compile-time, making it quite
difficult to use:
https://bugzilla.kernel.org/show_bug.cgi?id=214861
With -Warray-bounds almost enabled globally, it doesn't make sense to
keep this around.
Link: https://lkml.kernel.org/r/20211203235346.110809-1-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
124 lines
2.1 KiB
C
124 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
|
|
typedef void(*test_ubsan_fp)(void);
|
|
|
|
static void test_ubsan_add_overflow(void)
|
|
{
|
|
volatile int val = INT_MAX;
|
|
|
|
val += 2;
|
|
}
|
|
|
|
static void test_ubsan_sub_overflow(void)
|
|
{
|
|
volatile int val = INT_MIN;
|
|
volatile int val2 = 2;
|
|
|
|
val -= val2;
|
|
}
|
|
|
|
static void test_ubsan_mul_overflow(void)
|
|
{
|
|
volatile int val = INT_MAX / 2;
|
|
|
|
val *= 3;
|
|
}
|
|
|
|
static void test_ubsan_negate_overflow(void)
|
|
{
|
|
volatile int val = INT_MIN;
|
|
|
|
val = -val;
|
|
}
|
|
|
|
static void test_ubsan_divrem_overflow(void)
|
|
{
|
|
volatile int val = 16;
|
|
volatile int val2 = 0;
|
|
|
|
val /= val2;
|
|
}
|
|
|
|
static void test_ubsan_shift_out_of_bounds(void)
|
|
{
|
|
volatile int val = -1;
|
|
int val2 = 10;
|
|
|
|
val2 <<= val;
|
|
}
|
|
|
|
static void test_ubsan_out_of_bounds(void)
|
|
{
|
|
volatile int i = 4, j = 5;
|
|
volatile int arr[4];
|
|
|
|
arr[j] = i;
|
|
}
|
|
|
|
static void test_ubsan_load_invalid_value(void)
|
|
{
|
|
volatile char *dst, *src;
|
|
bool val, val2, *ptr;
|
|
char c = 4;
|
|
|
|
dst = (char *)&val;
|
|
src = &c;
|
|
*dst = *src;
|
|
|
|
ptr = &val2;
|
|
val2 = val;
|
|
}
|
|
|
|
static void test_ubsan_null_ptr_deref(void)
|
|
{
|
|
volatile int *ptr = NULL;
|
|
int val;
|
|
|
|
val = *ptr;
|
|
}
|
|
|
|
static void test_ubsan_misaligned_access(void)
|
|
{
|
|
volatile char arr[5] __aligned(4) = {1, 2, 3, 4, 5};
|
|
volatile int *ptr, val = 6;
|
|
|
|
ptr = (int *)(arr + 1);
|
|
*ptr = val;
|
|
}
|
|
|
|
static const test_ubsan_fp test_ubsan_array[] = {
|
|
test_ubsan_add_overflow,
|
|
test_ubsan_sub_overflow,
|
|
test_ubsan_mul_overflow,
|
|
test_ubsan_negate_overflow,
|
|
test_ubsan_divrem_overflow,
|
|
test_ubsan_shift_out_of_bounds,
|
|
test_ubsan_out_of_bounds,
|
|
test_ubsan_load_invalid_value,
|
|
//test_ubsan_null_ptr_deref, /* exclude it because there is a crash */
|
|
test_ubsan_misaligned_access,
|
|
};
|
|
|
|
static int __init test_ubsan_init(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(test_ubsan_array); i++)
|
|
test_ubsan_array[i]();
|
|
|
|
(void)test_ubsan_null_ptr_deref; /* to avoid unsed-function warning */
|
|
return 0;
|
|
}
|
|
module_init(test_ubsan_init);
|
|
|
|
static void __exit test_ubsan_exit(void)
|
|
{
|
|
/* do nothing */
|
|
}
|
|
module_exit(test_ubsan_exit);
|
|
|
|
MODULE_AUTHOR("Jinbum Park <jinb.park7@gmail.com>");
|
|
MODULE_LICENSE("GPL v2");
|