Modify fs/ext4/inode-test.c to use the parameterized testing
feature of KUnit.
Signed-off-by: Arpitha Raghunandan <[email protected]>
Signed-off-by: Marco Elver <[email protected]>
---
Changes v7->v8:
- Replace strcpy() with strncpy() in timestamp_expectation_to_desc()
Changes v6->v7:
- Introduce timestamp_expectation_to_desc() to convert param to
description.
Changes v5->v6:
- No change to this patch of the patch series
Changes v4->v5:
- No change to this patch of the patch series
Changes v3->v4:
- Modification based on latest implementation of KUnit parameterized testing
Changes v2->v3:
- Marked hardcoded test data const
- Modification based on latest implementation of KUnit parameterized testing
Changes v1->v2:
- Modification based on latest implementation of KUnit parameterized testing
fs/ext4/inode-test.c | 323 ++++++++++++++++++++++---------------------
1 file changed, 167 insertions(+), 156 deletions(-)
diff --git a/fs/ext4/inode-test.c b/fs/ext4/inode-test.c
index d62d802c9c12..2c0c00c45c6b 100644
--- a/fs/ext4/inode-test.c
+++ b/fs/ext4/inode-test.c
@@ -80,6 +80,148 @@ struct timestamp_expectation {
bool lower_bound;
};
+static const struct timestamp_expectation test_data[] = {
+ {
+ .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
+ .msb_set = true,
+ .lower_bound = true,
+ .extra_bits = 0,
+ .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
+ .msb_set = true,
+ .lower_bound = false,
+ .extra_bits = 0,
+ .expected = {.tv_sec = -1LL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
+ .msb_set = false,
+ .lower_bound = true,
+ .extra_bits = 0,
+ .expected = {0LL, 0L},
+ },
+
+ {
+ .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
+ .msb_set = false,
+ .lower_bound = false,
+ .extra_bits = 0,
+ .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
+ .msb_set = true,
+ .lower_bound = true,
+ .extra_bits = 1,
+ .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
+ .msb_set = true,
+ .lower_bound = false,
+ .extra_bits = 1,
+ .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
+ .msb_set = false,
+ .lower_bound = true,
+ .extra_bits = 1,
+ .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
+ .msb_set = false,
+ .lower_bound = false,
+ .extra_bits = 1,
+ .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
+ .msb_set = true,
+ .lower_bound = true,
+ .extra_bits = 2,
+ .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
+ .msb_set = true,
+ .lower_bound = false,
+ .extra_bits = 2,
+ .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
+ .msb_set = false,
+ .lower_bound = true,
+ .extra_bits = 2,
+ .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
+ .msb_set = false,
+ .lower_bound = false,
+ .extra_bits = 2,
+ .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
+ .msb_set = false,
+ .lower_bound = false,
+ .extra_bits = 6,
+ .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
+ },
+
+ {
+ .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
+ .msb_set = false,
+ .lower_bound = true,
+ .extra_bits = 0xFFFFFFFF,
+ .expected = {.tv_sec = 0x300000000LL,
+ .tv_nsec = MAX_NANOSECONDS},
+ },
+
+ {
+ .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
+ .msb_set = false,
+ .lower_bound = true,
+ .extra_bits = 3,
+ .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
+ },
+
+ {
+ .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
+ .msb_set = false,
+ .lower_bound = false,
+ .extra_bits = 3,
+ .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
+ }
+};
+
+static void timestamp_expectation_to_desc(const struct timestamp_expectation *t,
+ char *desc)
+{
+ int desc_length = strlen(t->test_case_name);
+
+ strncpy(desc, t->test_case_name, desc_length);
+ desc[desc_length] = '\0';
+}
+
+KUNIT_ARRAY_PARAM(ext4_inode, test_data, timestamp_expectation_to_desc);
+
static time64_t get_32bit_time(const struct timestamp_expectation * const test)
{
if (test->msb_set) {
@@ -101,166 +243,35 @@ static time64_t get_32bit_time(const struct timestamp_expectation * const test)
*/
static void inode_test_xtimestamp_decoding(struct kunit *test)
{
- const struct timestamp_expectation test_data[] = {
- {
- .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
- .msb_set = true,
- .lower_bound = true,
- .extra_bits = 0,
- .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
- .msb_set = true,
- .lower_bound = false,
- .extra_bits = 0,
- .expected = {.tv_sec = -1LL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
- .msb_set = false,
- .lower_bound = true,
- .extra_bits = 0,
- .expected = {0LL, 0L},
- },
-
- {
- .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
- .msb_set = false,
- .lower_bound = false,
- .extra_bits = 0,
- .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
- .msb_set = true,
- .lower_bound = true,
- .extra_bits = 1,
- .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
- .msb_set = true,
- .lower_bound = false,
- .extra_bits = 1,
- .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
- .msb_set = false,
- .lower_bound = true,
- .extra_bits = 1,
- .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
- .msb_set = false,
- .lower_bound = false,
- .extra_bits = 1,
- .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
- .msb_set = true,
- .lower_bound = true,
- .extra_bits = 2,
- .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
- .msb_set = true,
- .lower_bound = false,
- .extra_bits = 2,
- .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
- .msb_set = false,
- .lower_bound = true,
- .extra_bits = 2,
- .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
- .msb_set = false,
- .lower_bound = false,
- .extra_bits = 2,
- .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
- .msb_set = false,
- .lower_bound = false,
- .extra_bits = 6,
- .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
- },
-
- {
- .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
- .msb_set = false,
- .lower_bound = true,
- .extra_bits = 0xFFFFFFFF,
- .expected = {.tv_sec = 0x300000000LL,
- .tv_nsec = MAX_NANOSECONDS},
- },
-
- {
- .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
- .msb_set = false,
- .lower_bound = true,
- .extra_bits = 3,
- .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
- },
-
- {
- .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
- .msb_set = false,
- .lower_bound = false,
- .extra_bits = 3,
- .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
- }
- };
-
struct timespec64 timestamp;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(test_data); ++i) {
- timestamp.tv_sec = get_32bit_time(&test_data[i]);
- ext4_decode_extra_time(×tamp,
- cpu_to_le32(test_data[i].extra_bits));
-
- KUNIT_EXPECT_EQ_MSG(test,
- test_data[i].expected.tv_sec,
- timestamp.tv_sec,
- CASE_NAME_FORMAT,
- test_data[i].test_case_name,
- test_data[i].msb_set,
- test_data[i].lower_bound,
- test_data[i].extra_bits);
- KUNIT_EXPECT_EQ_MSG(test,
- test_data[i].expected.tv_nsec,
- timestamp.tv_nsec,
- CASE_NAME_FORMAT,
- test_data[i].test_case_name,
- test_data[i].msb_set,
- test_data[i].lower_bound,
- test_data[i].extra_bits);
- }
+
+ struct timestamp_expectation *test_param =
+ (struct timestamp_expectation *)(test->param_value);
+
+ timestamp.tv_sec = get_32bit_time(test_param);
+ ext4_decode_extra_time(×tamp,
+ cpu_to_le32(test_param->extra_bits));
+
+ KUNIT_EXPECT_EQ_MSG(test,
+ test_param->expected.tv_sec,
+ timestamp.tv_sec,
+ CASE_NAME_FORMAT,
+ test_param->test_case_name,
+ test_param->msb_set,
+ test_param->lower_bound,
+ test_param->extra_bits);
+ KUNIT_EXPECT_EQ_MSG(test,
+ test_param->expected.tv_nsec,
+ timestamp.tv_nsec,
+ CASE_NAME_FORMAT,
+ test_param->test_case_name,
+ test_param->msb_set,
+ test_param->lower_bound,
+ test_param->extra_bits);
}
static struct kunit_case ext4_inode_test_cases[] = {
- KUNIT_CASE(inode_test_xtimestamp_decoding),
+ KUNIT_CASE_PARAM(inode_test_xtimestamp_decoding, ext4_inode_gen_params),
{}
};
--
2.25.1
On Sun, 15 Nov 2020 at 19:59, Arpitha Raghunandan <[email protected]> wrote:
>
> Modify fs/ext4/inode-test.c to use the parameterized testing
> feature of KUnit.
>
> Signed-off-by: Arpitha Raghunandan <[email protected]>
> Signed-off-by: Marco Elver <[email protected]>
> ---
> Changes v7->v8:
> - Replace strcpy() with strncpy() in timestamp_expectation_to_desc()
> Changes v6->v7:
> - Introduce timestamp_expectation_to_desc() to convert param to
> description.
> Changes v5->v6:
> - No change to this patch of the patch series
> Changes v4->v5:
> - No change to this patch of the patch series
> Changes v3->v4:
> - Modification based on latest implementation of KUnit parameterized testing
> Changes v2->v3:
> - Marked hardcoded test data const
> - Modification based on latest implementation of KUnit parameterized testing
> Changes v1->v2:
> - Modification based on latest implementation of KUnit parameterized testing
>
> fs/ext4/inode-test.c | 323 ++++++++++++++++++++++---------------------
> 1 file changed, 167 insertions(+), 156 deletions(-)
>
> diff --git a/fs/ext4/inode-test.c b/fs/ext4/inode-test.c
> index d62d802c9c12..2c0c00c45c6b 100644
> --- a/fs/ext4/inode-test.c
> +++ b/fs/ext4/inode-test.c
> @@ -80,6 +80,148 @@ struct timestamp_expectation {
> bool lower_bound;
> };
>
> +static const struct timestamp_expectation test_data[] = {
> + {
> + .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> + .msb_set = true,
> + .lower_bound = true,
> + .extra_bits = 0,
> + .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> + .msb_set = true,
> + .lower_bound = false,
> + .extra_bits = 0,
> + .expected = {.tv_sec = -1LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 0,
> + .expected = {0LL, 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 0,
> + .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
> + .msb_set = true,
> + .lower_bound = true,
> + .extra_bits = 1,
> + .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
> + .msb_set = true,
> + .lower_bound = false,
> + .extra_bits = 1,
> + .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 1,
> + .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 1,
> + .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
> + .msb_set = true,
> + .lower_bound = true,
> + .extra_bits = 2,
> + .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
> + .msb_set = true,
> + .lower_bound = false,
> + .extra_bits = 2,
> + .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 2,
> + .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 2,
> + .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 6,
> + .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 0xFFFFFFFF,
> + .expected = {.tv_sec = 0x300000000LL,
> + .tv_nsec = MAX_NANOSECONDS},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 3,
> + .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 3,
> + .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
> + }
> +};
> +
> +static void timestamp_expectation_to_desc(const struct timestamp_expectation *t,
> + char *desc)
> +{
> + int desc_length = strlen(t->test_case_name);
> +
> + strncpy(desc, t->test_case_name, desc_length);
> + desc[desc_length] = '\0';
> +}
This unfortunately won't prevent out-of-bounds accesses if the
description is longer than KUNIT_PARAM_DESC_SIZE.
With strncpy() we want to avoid copying more bytes than the
destination buffer can hold. This can be done by simply a
strncpy(desc, t->test_case_name, KUNIT_PARAM_DESC_SIZE). But,
strncpy() is unsafe in certain cases, too, so the kernel introduced
strscpy() -- see the note about strncpy() in
Documentation/process/deprecated.rst. Also have a look at the
documentation about str{n,l,s}cpy() in lib/string.c.
So, finally, what we want here is just 1 line:
strscpy(desc, t->test_case_name, KUNIT_PARAM_DESC_SIZE);
Patch 1/2 looks fine though, so hopefully v9 will be final. :-)
Thanks,
-- Marco
On 16/11/20 1:14 am, Marco Elver wrote:
> On Sun, 15 Nov 2020 at 19:59, Arpitha Raghunandan <[email protected]> wrote:
>>
>> Modify fs/ext4/inode-test.c to use the parameterized testing
>> feature of KUnit.
>>
>> Signed-off-by: Arpitha Raghunandan <[email protected]>
>> Signed-off-by: Marco Elver <[email protected]>
>> ---
>> Changes v7->v8:
>> - Replace strcpy() with strncpy() in timestamp_expectation_to_desc()
>> Changes v6->v7:
>> - Introduce timestamp_expectation_to_desc() to convert param to
>> description.
>> Changes v5->v6:
>> - No change to this patch of the patch series
>> Changes v4->v5:
>> - No change to this patch of the patch series
>> Changes v3->v4:
>> - Modification based on latest implementation of KUnit parameterized testing
>> Changes v2->v3:
>> - Marked hardcoded test data const
>> - Modification based on latest implementation of KUnit parameterized testing
>> Changes v1->v2:
>> - Modification based on latest implementation of KUnit parameterized testing
>>
>> fs/ext4/inode-test.c | 323 ++++++++++++++++++++++---------------------
>> 1 file changed, 167 insertions(+), 156 deletions(-)
>>
>> diff --git a/fs/ext4/inode-test.c b/fs/ext4/inode-test.c
>> index d62d802c9c12..2c0c00c45c6b 100644
>> --- a/fs/ext4/inode-test.c
>> +++ b/fs/ext4/inode-test.c
>> @@ -80,6 +80,148 @@ struct timestamp_expectation {
>> bool lower_bound;
>> };
>>
>> +static const struct timestamp_expectation test_data[] = {
>> + {
>> + .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
>> + .msb_set = true,
>> + .lower_bound = true,
>> + .extra_bits = 0,
>> + .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
>> + .msb_set = true,
>> + .lower_bound = false,
>> + .extra_bits = 0,
>> + .expected = {.tv_sec = -1LL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
>> + .msb_set = false,
>> + .lower_bound = true,
>> + .extra_bits = 0,
>> + .expected = {0LL, 0L},
>> + },
>> +
>> + {
>> + .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
>> + .msb_set = false,
>> + .lower_bound = false,
>> + .extra_bits = 0,
>> + .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
>> + .msb_set = true,
>> + .lower_bound = true,
>> + .extra_bits = 1,
>> + .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
>> + .msb_set = true,
>> + .lower_bound = false,
>> + .extra_bits = 1,
>> + .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
>> + .msb_set = false,
>> + .lower_bound = true,
>> + .extra_bits = 1,
>> + .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
>> + .msb_set = false,
>> + .lower_bound = false,
>> + .extra_bits = 1,
>> + .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
>> + .msb_set = true,
>> + .lower_bound = true,
>> + .extra_bits = 2,
>> + .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
>> + .msb_set = true,
>> + .lower_bound = false,
>> + .extra_bits = 2,
>> + .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
>> + .msb_set = false,
>> + .lower_bound = true,
>> + .extra_bits = 2,
>> + .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
>> + .msb_set = false,
>> + .lower_bound = false,
>> + .extra_bits = 2,
>> + .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
>> + .msb_set = false,
>> + .lower_bound = false,
>> + .extra_bits = 6,
>> + .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
>> + },
>> +
>> + {
>> + .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
>> + .msb_set = false,
>> + .lower_bound = true,
>> + .extra_bits = 0xFFFFFFFF,
>> + .expected = {.tv_sec = 0x300000000LL,
>> + .tv_nsec = MAX_NANOSECONDS},
>> + },
>> +
>> + {
>> + .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
>> + .msb_set = false,
>> + .lower_bound = true,
>> + .extra_bits = 3,
>> + .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
>> + },
>> +
>> + {
>> + .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
>> + .msb_set = false,
>> + .lower_bound = false,
>> + .extra_bits = 3,
>> + .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
>> + }
>> +};
>> +
>> +static void timestamp_expectation_to_desc(const struct timestamp_expectation *t,
>> + char *desc)
>> +{
>> + int desc_length = strlen(t->test_case_name);
>> +
>> + strncpy(desc, t->test_case_name, desc_length);
>> + desc[desc_length] = '\0';
>> +}
>
> This unfortunately won't prevent out-of-bounds accesses if the
> description is longer than KUNIT_PARAM_DESC_SIZE.
>
> With strncpy() we want to avoid copying more bytes than the
> destination buffer can hold. This can be done by simply a
> strncpy(desc, t->test_case_name, KUNIT_PARAM_DESC_SIZE). But,
> strncpy() is unsafe in certain cases, too, so the kernel introduced
> strscpy() -- see the note about strncpy() in
> Documentation/process/deprecated.rst. Also have a look at the
> documentation about str{n,l,s}cpy() in lib/string.c.
>
> So, finally, what we want here is just 1 line:
>
> strscpy(desc, t->test_case_name, KUNIT_PARAM_DESC_SIZE);
>
Okay, I'll look this up and make this change for v9.
> Patch 1/2 looks fine though, so hopefully v9 will be final. :-)
>
> Thanks,
> -- Marco
>
Thanks!