From: Dave Hansen <dave.hansen@intel.com>
To: Reinette Chatre <reinette.chatre@intel.com>,
jarkko@kernel.org, dave.hansen@linux.intel.com,
linux-sgx@vger.kernel.org, shuah@kernel.org
Cc: linux-kselftest@vger.kernel.org
Subject: Re: [PATCH 3/4] selftests/sgx: Ensure enclave data available during debug print
Date: Fri, 28 Jan 2022 11:06:58 -0800 [thread overview]
Message-ID: <ab92b3be-24bf-6fc9-aefe-266aaa16846a@intel.com> (raw)
In-Reply-To: <ddb6554a95b0978aa018740fbfb32f786bcbd284.1643393473.git.reinette.chatre@intel.com>
On 1/28/22 10:23, Reinette Chatre wrote:
> In support of debugging the SGX tests print details from
> the enclave and its memory mappings if any failure is encountered
> during enclave loading.
>
> When a failure is encountered no data is printed because the
> printing of the data is preceded by cleanup of the data.
>
> Move the data cleanup after the data print.
Isn't it worse than that?
> err:
> - encl_delete(encl);
> -
> for (i = 0; i < encl->nr_segments; i++) {
> seg = &encl->segment_tbl[i];
encl_delete() does:
free(encl->segment_tbl);
but doesn't zero encl->nr_segments from what I can see. That seems like
a use-after-free.
Seems like we need to really run the selftest under valgrind.
next prev parent reply other threads:[~2022-01-28 19:07 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-28 18:23 [PATCH 0/4] selftests/sgx: Early enclave loading error path fixes Reinette Chatre
2022-01-28 18:23 ` [PATCH 1/4] selftests/sgx: Fix segfault upon early test failure Reinette Chatre
2022-01-28 18:43 ` Dave Hansen
2022-01-28 19:22 ` Reinette Chatre
2022-01-28 19:26 ` Dave Hansen
2022-01-28 20:08 ` Reinette Chatre
2022-02-15 19:39 ` Jarkko Sakkinen
2022-01-28 18:23 ` [PATCH 2/4] selftests/sgx: Do not attempt enclave build without valid enclave Reinette Chatre
2022-01-28 19:03 ` Dave Hansen
2022-01-28 19:23 ` Reinette Chatre
2022-02-15 19:35 ` Jarkko Sakkinen
2022-01-28 18:23 ` [PATCH 3/4] selftests/sgx: Ensure enclave data available during debug print Reinette Chatre
2022-01-28 19:06 ` Dave Hansen [this message]
2022-01-28 19:40 ` Reinette Chatre
2022-02-15 19:35 ` Jarkko Sakkinen
2022-01-28 18:23 ` [PATCH 4/4] selftests/sgx: Remove extra newlines in test output Reinette Chatre
2022-01-28 19:07 ` Dave Hansen
2022-02-15 19:34 ` Jarkko Sakkinen
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