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kunit: executor: Fix a memory leak on failure in kunit_filter_tests 

It's possible that memory allocation for 'filtered' will fail, but for the
copy of the suite to succeed. In this case, the copy could be leaked.

Properly free 'copy' in the error case for the allocation of 'filtered'
failing.

Note that there may also have been a similar issue in
kunit_filter_subsuites, before it was removed in "kunit: flatten
kunit_suite*** to kunit_suite** in .kunit_test_suites".

This was reported by clang-analyzer via the kernel test robot, here:
https://lore.kernel.org/all/c8073b8e-7b9e-0830-4177-87c12f16349c@intel.com/

And by smatch via Dan Carpenter and the kernel test robot:
https://lore.kernel.org/all/202207101328.ASjx88yj-lkp@intel.com/

Fixes: a02353f491 ("kunit: bail out of test filtering logic quicker if OOM")
Reported-by: kernel test robot <yujie.liu@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
David Gow 2022-07-13 07:25:27 +08:00 committed by Shuah Khan
parent f84a9e9658
commit 94681e289b
1 changed files with 3 additions and 1 deletions
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4
lib/kunit/executor.c
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@ -74,8 +74,10 @@ kunit_filter_tests(const struct kunit_suite *const suite, const char *test_glob)
return ERR_PTR(-ENOMEM);
filtered = kcalloc(n + 1, sizeof(*filtered), GFP_KERNEL);
if (!filtered)
if (!filtered) {
kfree(copy);
return ERR_PTR(-ENOMEM);
}
n = 0;
kunit_suite_for_each_test_case(suite, test_case) {