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kunit: Fix possible memory leak in kunit_filter_suites()

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If the outer layer for loop is iterated more than once and it fails not
in the first iteration, the filtered_suite and filtered_suite->test_cases
allocated in the last kunit_filter_attr_tests() in last inner for loop
is leaked.

So add a new free_filtered_suite err label and free the filtered_suite
and filtered_suite->test_cases so far. And change kmalloc_array of copy
to kcalloc to Clear the copy to make the kfree safe.

Fixes: 529534e8cb ("kunit: Add ability to filter attributes")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Jinjie Ruan 2023-09-27 17:03:49 +08:00 committed by Shuah Khan
parent e44679515a
commit 24de14c98b
1 changed files with 13 additions and 4 deletions
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17
lib/kunit/executor.c
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@ -157,10 +157,11 @@ kunit_filter_suites(const struct kunit_suite_set *suite_set,
struct kunit_suite_set filtered = {NULL, NULL};
struct kunit_glob_filter parsed_glob;
struct kunit_attr_filter *parsed_filters = NULL;
struct kunit_suite * const *suites;
const size_t max = suite_set->end - suite_set->start;
copy = kmalloc_array(max, sizeof(*filtered.start), GFP_KERNEL);
copy = kcalloc(max, sizeof(*filtered.start), GFP_KERNEL);
if (!copy) { /* won't be able to run anything, return an empty set */
return filtered;
}
@ -195,7 +196,7 @@ kunit_filter_suites(const struct kunit_suite_set *suite_set,
parsed_glob.test_glob);
if (IS_ERR(filtered_suite)) {
*err = PTR_ERR(filtered_suite);
goto free_parsed_filters;
goto free_filtered_suite;
}
}
if (filter_count > 0 && parsed_filters != NULL) {
@ -212,11 +213,11 @@ kunit_filter_suites(const struct kunit_suite_set *suite_set,
filtered_suite = new_filtered_suite;
if (*err)
goto free_parsed_filters;
goto free_filtered_suite;
if (IS_ERR(filtered_suite)) {
*err = PTR_ERR(filtered_suite);
goto free_parsed_filters;
goto free_filtered_suite;
}
if (!filtered_suite)
break;
@ -231,6 +232,14 @@ kunit_filter_suites(const struct kunit_suite_set *suite_set,
filtered.start = copy_start;
filtered.end = copy;
free_filtered_suite:
if (*err) {
for (suites = copy_start; suites < copy; suites++) {
kfree((*suites)->test_cases);
kfree(*suites);
}
}
free_parsed_filters:
if (filter_count)
kfree(parsed_filters);