mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
![Kees Cook](/assets/img/avatar_default.png)
Since the long memcpy tests may stall a system for tens of seconds in virtualized architecture environments, split those tests off under CONFIG_MEMCPY_SLOW_KUNIT_TEST so they can be separately disabled. Reported-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/lkml/20221226195206.GA2626419@roeck-us.net Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-and-tested-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: David Gow <davidgow@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: linux-hardening@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
569 lines
17 KiB
C
569 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Test cases for memcpy(), memmove(), and memset().
|
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <kunit/test.h>
|
|
#include <linux/device.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/module.h>
|
|
#include <linux/overflow.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/types.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
struct some_bytes {
|
|
union {
|
|
u8 data[32];
|
|
struct {
|
|
u32 one;
|
|
u16 two;
|
|
u8 three;
|
|
/* 1 byte hole */
|
|
u32 four[4];
|
|
};
|
|
};
|
|
};
|
|
|
|
#define check(instance, v) do { \
|
|
BUILD_BUG_ON(sizeof(instance.data) != 32); \
|
|
for (size_t i = 0; i < sizeof(instance.data); i++) { \
|
|
KUNIT_ASSERT_EQ_MSG(test, instance.data[i], v, \
|
|
"line %d: '%s' not initialized to 0x%02x @ %d (saw 0x%02x)\n", \
|
|
__LINE__, #instance, v, i, instance.data[i]); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define compare(name, one, two) do { \
|
|
BUILD_BUG_ON(sizeof(one) != sizeof(two)); \
|
|
for (size_t i = 0; i < sizeof(one); i++) { \
|
|
KUNIT_EXPECT_EQ_MSG(test, one.data[i], two.data[i], \
|
|
"line %d: %s.data[%d] (0x%02x) != %s.data[%d] (0x%02x)\n", \
|
|
__LINE__, #one, i, one.data[i], #two, i, two.data[i]); \
|
|
} \
|
|
kunit_info(test, "ok: " TEST_OP "() " name "\n"); \
|
|
} while (0)
|
|
|
|
static void memcpy_test(struct kunit *test)
|
|
{
|
|
#define TEST_OP "memcpy"
|
|
struct some_bytes control = {
|
|
.data = { 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
},
|
|
};
|
|
struct some_bytes zero = { };
|
|
struct some_bytes middle = {
|
|
.data = { 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
},
|
|
};
|
|
struct some_bytes three = {
|
|
.data = { 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
0x20, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
|
|
},
|
|
};
|
|
struct some_bytes dest = { };
|
|
int count;
|
|
u8 *ptr;
|
|
|
|
/* Verify static initializers. */
|
|
check(control, 0x20);
|
|
check(zero, 0);
|
|
compare("static initializers", dest, zero);
|
|
|
|
/* Verify assignment. */
|
|
dest = control;
|
|
compare("direct assignment", dest, control);
|
|
|
|
/* Verify complete overwrite. */
|
|
memcpy(dest.data, zero.data, sizeof(dest.data));
|
|
compare("complete overwrite", dest, zero);
|
|
|
|
/* Verify middle overwrite. */
|
|
dest = control;
|
|
memcpy(dest.data + 12, zero.data, 7);
|
|
compare("middle overwrite", dest, middle);
|
|
|
|
/* Verify argument side-effects aren't repeated. */
|
|
dest = control;
|
|
ptr = dest.data;
|
|
count = 1;
|
|
memcpy(ptr++, zero.data, count++);
|
|
ptr += 8;
|
|
memcpy(ptr++, zero.data, count++);
|
|
compare("argument side-effects", dest, three);
|
|
#undef TEST_OP
|
|
}
|
|
|
|
static unsigned char larger_array [2048];
|
|
|
|
static void memmove_test(struct kunit *test)
|
|
{
|
|
#define TEST_OP "memmove"
|
|
struct some_bytes control = {
|
|
.data = { 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
},
|
|
};
|
|
struct some_bytes zero = { };
|
|
struct some_bytes middle = {
|
|
.data = { 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
},
|
|
};
|
|
struct some_bytes five = {
|
|
.data = { 0x00, 0x00, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x00, 0x00, 0x00, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
},
|
|
};
|
|
struct some_bytes overlap = {
|
|
.data = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
|
|
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
},
|
|
};
|
|
struct some_bytes overlap_expected = {
|
|
.data = { 0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x04, 0x07,
|
|
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99,
|
|
},
|
|
};
|
|
struct some_bytes dest = { };
|
|
int count;
|
|
u8 *ptr;
|
|
|
|
/* Verify static initializers. */
|
|
check(control, 0x99);
|
|
check(zero, 0);
|
|
compare("static initializers", zero, dest);
|
|
|
|
/* Verify assignment. */
|
|
dest = control;
|
|
compare("direct assignment", dest, control);
|
|
|
|
/* Verify complete overwrite. */
|
|
memmove(dest.data, zero.data, sizeof(dest.data));
|
|
compare("complete overwrite", dest, zero);
|
|
|
|
/* Verify middle overwrite. */
|
|
dest = control;
|
|
memmove(dest.data + 12, zero.data, 7);
|
|
compare("middle overwrite", dest, middle);
|
|
|
|
/* Verify argument side-effects aren't repeated. */
|
|
dest = control;
|
|
ptr = dest.data;
|
|
count = 2;
|
|
memmove(ptr++, zero.data, count++);
|
|
ptr += 9;
|
|
memmove(ptr++, zero.data, count++);
|
|
compare("argument side-effects", dest, five);
|
|
|
|
/* Verify overlapping overwrite is correct. */
|
|
ptr = &overlap.data[2];
|
|
memmove(ptr, overlap.data, 5);
|
|
compare("overlapping write", overlap, overlap_expected);
|
|
|
|
/* Verify larger overlapping moves. */
|
|
larger_array[256] = 0xAAu;
|
|
/*
|
|
* Test a backwards overlapping memmove first. 256 and 1024 are
|
|
* important for i386 to use rep movsl.
|
|
*/
|
|
memmove(larger_array, larger_array + 256, 1024);
|
|
KUNIT_ASSERT_EQ(test, larger_array[0], 0xAAu);
|
|
KUNIT_ASSERT_EQ(test, larger_array[256], 0x00);
|
|
KUNIT_ASSERT_NULL(test,
|
|
memchr(larger_array + 1, 0xaa, ARRAY_SIZE(larger_array) - 1));
|
|
/* Test a forwards overlapping memmove. */
|
|
larger_array[0] = 0xBBu;
|
|
memmove(larger_array + 256, larger_array, 1024);
|
|
KUNIT_ASSERT_EQ(test, larger_array[0], 0xBBu);
|
|
KUNIT_ASSERT_EQ(test, larger_array[256], 0xBBu);
|
|
KUNIT_ASSERT_NULL(test, memchr(larger_array + 1, 0xBBu, 256 - 1));
|
|
KUNIT_ASSERT_NULL(test,
|
|
memchr(larger_array + 257, 0xBBu, ARRAY_SIZE(larger_array) - 257));
|
|
#undef TEST_OP
|
|
}
|
|
|
|
static void memset_test(struct kunit *test)
|
|
{
|
|
#define TEST_OP "memset"
|
|
struct some_bytes control = {
|
|
.data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
},
|
|
};
|
|
struct some_bytes complete = {
|
|
.data = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
},
|
|
};
|
|
struct some_bytes middle = {
|
|
.data = { 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x31, 0x31,
|
|
0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31,
|
|
0x31, 0x31, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30,
|
|
0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
},
|
|
};
|
|
struct some_bytes three = {
|
|
.data = { 0x60, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
0x30, 0x61, 0x61, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
},
|
|
};
|
|
struct some_bytes after = {
|
|
.data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x72,
|
|
0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72,
|
|
0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72,
|
|
0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72,
|
|
},
|
|
};
|
|
struct some_bytes startat = {
|
|
.data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
|
|
0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79,
|
|
0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79,
|
|
0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79,
|
|
},
|
|
};
|
|
struct some_bytes dest = { };
|
|
int count, value;
|
|
u8 *ptr;
|
|
|
|
/* Verify static initializers. */
|
|
check(control, 0x30);
|
|
check(dest, 0);
|
|
|
|
/* Verify assignment. */
|
|
dest = control;
|
|
compare("direct assignment", dest, control);
|
|
|
|
/* Verify complete overwrite. */
|
|
memset(dest.data, 0xff, sizeof(dest.data));
|
|
compare("complete overwrite", dest, complete);
|
|
|
|
/* Verify middle overwrite. */
|
|
dest = control;
|
|
memset(dest.data + 4, 0x31, 16);
|
|
compare("middle overwrite", dest, middle);
|
|
|
|
/* Verify argument side-effects aren't repeated. */
|
|
dest = control;
|
|
ptr = dest.data;
|
|
value = 0x60;
|
|
count = 1;
|
|
memset(ptr++, value++, count++);
|
|
ptr += 8;
|
|
memset(ptr++, value++, count++);
|
|
compare("argument side-effects", dest, three);
|
|
|
|
/* Verify memset_after() */
|
|
dest = control;
|
|
memset_after(&dest, 0x72, three);
|
|
compare("memset_after()", dest, after);
|
|
|
|
/* Verify memset_startat() */
|
|
dest = control;
|
|
memset_startat(&dest, 0x79, four);
|
|
compare("memset_startat()", dest, startat);
|
|
#undef TEST_OP
|
|
}
|
|
|
|
static u8 large_src[1024];
|
|
static u8 large_dst[2048];
|
|
static const u8 large_zero[2048];
|
|
|
|
static void set_random_nonzero(struct kunit *test, u8 *byte)
|
|
{
|
|
int failed_rng = 0;
|
|
|
|
while (*byte == 0) {
|
|
get_random_bytes(byte, 1);
|
|
KUNIT_ASSERT_LT_MSG(test, failed_rng++, 100,
|
|
"Is the RNG broken?");
|
|
}
|
|
}
|
|
|
|
static void init_large(struct kunit *test)
|
|
{
|
|
if (!IS_ENABLED(CONFIG_MEMCPY_SLOW_KUNIT_TEST))
|
|
kunit_skip(test, "Slow test skipped. Enable with CONFIG_MEMCPY_SLOW_KUNIT_TEST=y");
|
|
|
|
/* Get many bit patterns. */
|
|
get_random_bytes(large_src, ARRAY_SIZE(large_src));
|
|
|
|
/* Make sure we have non-zero edges. */
|
|
set_random_nonzero(test, &large_src[0]);
|
|
set_random_nonzero(test, &large_src[ARRAY_SIZE(large_src) - 1]);
|
|
|
|
/* Explicitly zero the entire destination. */
|
|
memset(large_dst, 0, ARRAY_SIZE(large_dst));
|
|
}
|
|
|
|
/*
|
|
* Instead of an indirect function call for "copy" or a giant macro,
|
|
* use a bool to pick memcpy or memmove.
|
|
*/
|
|
static void copy_large_test(struct kunit *test, bool use_memmove)
|
|
{
|
|
init_large(test);
|
|
|
|
/* Copy a growing number of non-overlapping bytes ... */
|
|
for (int bytes = 1; bytes <= ARRAY_SIZE(large_src); bytes++) {
|
|
/* Over a shifting destination window ... */
|
|
for (int offset = 0; offset < ARRAY_SIZE(large_src); offset++) {
|
|
int right_zero_pos = offset + bytes;
|
|
int right_zero_size = ARRAY_SIZE(large_dst) - right_zero_pos;
|
|
|
|
/* Copy! */
|
|
if (use_memmove)
|
|
memmove(large_dst + offset, large_src, bytes);
|
|
else
|
|
memcpy(large_dst + offset, large_src, bytes);
|
|
|
|
/* Did we touch anything before the copy area? */
|
|
KUNIT_ASSERT_EQ_MSG(test,
|
|
memcmp(large_dst, large_zero, offset), 0,
|
|
"with size %d at offset %d", bytes, offset);
|
|
/* Did we touch anything after the copy area? */
|
|
KUNIT_ASSERT_EQ_MSG(test,
|
|
memcmp(&large_dst[right_zero_pos], large_zero, right_zero_size), 0,
|
|
"with size %d at offset %d", bytes, offset);
|
|
|
|
/* Are we byte-for-byte exact across the copy? */
|
|
KUNIT_ASSERT_EQ_MSG(test,
|
|
memcmp(large_dst + offset, large_src, bytes), 0,
|
|
"with size %d at offset %d", bytes, offset);
|
|
|
|
/* Zero out what we copied for the next cycle. */
|
|
memset(large_dst + offset, 0, bytes);
|
|
}
|
|
/* Avoid stall warnings if this loop gets slow. */
|
|
cond_resched();
|
|
}
|
|
}
|
|
|
|
static void memcpy_large_test(struct kunit *test)
|
|
{
|
|
copy_large_test(test, false);
|
|
}
|
|
|
|
static void memmove_large_test(struct kunit *test)
|
|
{
|
|
copy_large_test(test, true);
|
|
}
|
|
|
|
/*
|
|
* On the assumption that boundary conditions are going to be the most
|
|
* sensitive, instead of taking a full step (inc) each iteration,
|
|
* take single index steps for at least the first "inc"-many indexes
|
|
* from the "start" and at least the last "inc"-many indexes before
|
|
* the "end". When in the middle, take full "inc"-wide steps. For
|
|
* example, calling next_step(idx, 1, 15, 3) with idx starting at 0
|
|
* would see the following pattern: 1 2 3 4 7 10 11 12 13 14 15.
|
|
*/
|
|
static int next_step(int idx, int start, int end, int inc)
|
|
{
|
|
start += inc;
|
|
end -= inc;
|
|
|
|
if (idx < start || idx + inc > end)
|
|
inc = 1;
|
|
return idx + inc;
|
|
}
|
|
|
|
static void inner_loop(struct kunit *test, int bytes, int d_off, int s_off)
|
|
{
|
|
int left_zero_pos, left_zero_size;
|
|
int right_zero_pos, right_zero_size;
|
|
int src_pos, src_orig_pos, src_size;
|
|
int pos;
|
|
|
|
/* Place the source in the destination buffer. */
|
|
memcpy(&large_dst[s_off], large_src, bytes);
|
|
|
|
/* Copy to destination offset. */
|
|
memmove(&large_dst[d_off], &large_dst[s_off], bytes);
|
|
|
|
/* Make sure destination entirely matches. */
|
|
KUNIT_ASSERT_EQ_MSG(test, memcmp(&large_dst[d_off], large_src, bytes), 0,
|
|
"with size %d at src offset %d and dest offset %d",
|
|
bytes, s_off, d_off);
|
|
|
|
/* Calculate the expected zero spans. */
|
|
if (s_off < d_off) {
|
|
left_zero_pos = 0;
|
|
left_zero_size = s_off;
|
|
|
|
right_zero_pos = d_off + bytes;
|
|
right_zero_size = ARRAY_SIZE(large_dst) - right_zero_pos;
|
|
|
|
src_pos = s_off;
|
|
src_orig_pos = 0;
|
|
src_size = d_off - s_off;
|
|
} else {
|
|
left_zero_pos = 0;
|
|
left_zero_size = d_off;
|
|
|
|
right_zero_pos = s_off + bytes;
|
|
right_zero_size = ARRAY_SIZE(large_dst) - right_zero_pos;
|
|
|
|
src_pos = d_off + bytes;
|
|
src_orig_pos = src_pos - s_off;
|
|
src_size = right_zero_pos - src_pos;
|
|
}
|
|
|
|
/* Check non-overlapping source is unchanged.*/
|
|
KUNIT_ASSERT_EQ_MSG(test,
|
|
memcmp(&large_dst[src_pos], &large_src[src_orig_pos], src_size), 0,
|
|
"with size %d at src offset %d and dest offset %d",
|
|
bytes, s_off, d_off);
|
|
|
|
/* Check leading buffer contents are zero. */
|
|
KUNIT_ASSERT_EQ_MSG(test,
|
|
memcmp(&large_dst[left_zero_pos], large_zero, left_zero_size), 0,
|
|
"with size %d at src offset %d and dest offset %d",
|
|
bytes, s_off, d_off);
|
|
/* Check trailing buffer contents are zero. */
|
|
KUNIT_ASSERT_EQ_MSG(test,
|
|
memcmp(&large_dst[right_zero_pos], large_zero, right_zero_size), 0,
|
|
"with size %d at src offset %d and dest offset %d",
|
|
bytes, s_off, d_off);
|
|
|
|
/* Zero out everything not already zeroed.*/
|
|
pos = left_zero_pos + left_zero_size;
|
|
memset(&large_dst[pos], 0, right_zero_pos - pos);
|
|
}
|
|
|
|
static void memmove_overlap_test(struct kunit *test)
|
|
{
|
|
/*
|
|
* Running all possible offset and overlap combinations takes a
|
|
* very long time. Instead, only check up to 128 bytes offset
|
|
* into the destination buffer (which should result in crossing
|
|
* cachelines), with a step size of 1 through 7 to try to skip some
|
|
* redundancy.
|
|
*/
|
|
static const int offset_max = 128; /* less than ARRAY_SIZE(large_src); */
|
|
static const int bytes_step = 7;
|
|
static const int window_step = 7;
|
|
|
|
static const int bytes_start = 1;
|
|
static const int bytes_end = ARRAY_SIZE(large_src) + 1;
|
|
|
|
init_large(test);
|
|
|
|
/* Copy a growing number of overlapping bytes ... */
|
|
for (int bytes = bytes_start; bytes < bytes_end;
|
|
bytes = next_step(bytes, bytes_start, bytes_end, bytes_step)) {
|
|
|
|
/* Over a shifting destination window ... */
|
|
for (int d_off = 0; d_off < offset_max; d_off++) {
|
|
int s_start = max(d_off - bytes, 0);
|
|
int s_end = min_t(int, d_off + bytes, ARRAY_SIZE(large_src));
|
|
|
|
/* Over a shifting source window ... */
|
|
for (int s_off = s_start; s_off < s_end;
|
|
s_off = next_step(s_off, s_start, s_end, window_step))
|
|
inner_loop(test, bytes, d_off, s_off);
|
|
|
|
/* Avoid stall warnings. */
|
|
cond_resched();
|
|
}
|
|
}
|
|
}
|
|
|
|
static void strtomem_test(struct kunit *test)
|
|
{
|
|
static const char input[sizeof(unsigned long)] = "hi";
|
|
static const char truncate[] = "this is too long";
|
|
struct {
|
|
unsigned long canary1;
|
|
unsigned char output[sizeof(unsigned long)] __nonstring;
|
|
unsigned long canary2;
|
|
} wrap;
|
|
|
|
memset(&wrap, 0xFF, sizeof(wrap));
|
|
KUNIT_EXPECT_EQ_MSG(test, wrap.canary1, ULONG_MAX,
|
|
"bad initial canary value");
|
|
KUNIT_EXPECT_EQ_MSG(test, wrap.canary2, ULONG_MAX,
|
|
"bad initial canary value");
|
|
|
|
/* Check unpadded copy leaves surroundings untouched. */
|
|
strtomem(wrap.output, input);
|
|
KUNIT_EXPECT_EQ(test, wrap.canary1, ULONG_MAX);
|
|
KUNIT_EXPECT_EQ(test, wrap.output[0], input[0]);
|
|
KUNIT_EXPECT_EQ(test, wrap.output[1], input[1]);
|
|
for (size_t i = 2; i < sizeof(wrap.output); i++)
|
|
KUNIT_EXPECT_EQ(test, wrap.output[i], 0xFF);
|
|
KUNIT_EXPECT_EQ(test, wrap.canary2, ULONG_MAX);
|
|
|
|
/* Check truncated copy leaves surroundings untouched. */
|
|
memset(&wrap, 0xFF, sizeof(wrap));
|
|
strtomem(wrap.output, truncate);
|
|
KUNIT_EXPECT_EQ(test, wrap.canary1, ULONG_MAX);
|
|
for (size_t i = 0; i < sizeof(wrap.output); i++)
|
|
KUNIT_EXPECT_EQ(test, wrap.output[i], truncate[i]);
|
|
KUNIT_EXPECT_EQ(test, wrap.canary2, ULONG_MAX);
|
|
|
|
/* Check padded copy leaves only string padded. */
|
|
memset(&wrap, 0xFF, sizeof(wrap));
|
|
strtomem_pad(wrap.output, input, 0xAA);
|
|
KUNIT_EXPECT_EQ(test, wrap.canary1, ULONG_MAX);
|
|
KUNIT_EXPECT_EQ(test, wrap.output[0], input[0]);
|
|
KUNIT_EXPECT_EQ(test, wrap.output[1], input[1]);
|
|
for (size_t i = 2; i < sizeof(wrap.output); i++)
|
|
KUNIT_EXPECT_EQ(test, wrap.output[i], 0xAA);
|
|
KUNIT_EXPECT_EQ(test, wrap.canary2, ULONG_MAX);
|
|
|
|
/* Check truncated padded copy has no padding. */
|
|
memset(&wrap, 0xFF, sizeof(wrap));
|
|
strtomem(wrap.output, truncate);
|
|
KUNIT_EXPECT_EQ(test, wrap.canary1, ULONG_MAX);
|
|
for (size_t i = 0; i < sizeof(wrap.output); i++)
|
|
KUNIT_EXPECT_EQ(test, wrap.output[i], truncate[i]);
|
|
KUNIT_EXPECT_EQ(test, wrap.canary2, ULONG_MAX);
|
|
}
|
|
|
|
static struct kunit_case memcpy_test_cases[] = {
|
|
KUNIT_CASE(memset_test),
|
|
KUNIT_CASE(memcpy_test),
|
|
KUNIT_CASE(memcpy_large_test),
|
|
KUNIT_CASE(memmove_test),
|
|
KUNIT_CASE(memmove_large_test),
|
|
KUNIT_CASE(memmove_overlap_test),
|
|
KUNIT_CASE(strtomem_test),
|
|
{}
|
|
};
|
|
|
|
static struct kunit_suite memcpy_test_suite = {
|
|
.name = "memcpy",
|
|
.test_cases = memcpy_test_cases,
|
|
};
|
|
|
|
kunit_test_suite(memcpy_test_suite);
|
|
|
|
MODULE_LICENSE("GPL");
|