linux-kernel - Re: [PATCH] kunit: executor: Fix a memory leak on failure in kunit_filter

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Message-ID: <CAGS_qxrBGcz4gAtqu8QSJO8SP_a0n+18OiBVQaRXBQMwbL4w+Q@mail.gmail.com>
Date:   Tue, 12 Jul 2022 14:27:10 -0700
From:   Daniel Latypov <dlatypov@...gle.com>
To:     David Gow <davidgow@...gle.com>
Cc:     Brendan Higgins <brendanhiggins@...gle.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        kunit-dev@...glegroups.com, linux-kselftest@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        llvm@...ts.linux.dev, kernel test robot <yujie.liu@...el.com>
Subject: Re: [PATCH] kunit: executor: Fix a memory leak on failure in kunit_filter_tests

On Tue, Jul 12, 2022 at 2:56 AM David Gow <davidgow@...gle.com> wrote:
>
> It's possible that memory allocation for the copy 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/
>
> Fixes: a02353f49162 ("kunit: bail out of test filtering logic quicker if OOM")
> Reported-by: kernel test robot <yujie.liu@...el.com>
> Signed-off-by: David Gow <davidgow@...gle.com>

Reviewed-by: Daniel Latypov <dlatypov@...gle.com>

Thanks for taking care of this.