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[24.9.64.241]) by smtp.gmail.com with ESMTPSA id h12sm8674093ilj.6.2021.07.12.11.31.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 Jul 2021 11:31:28 -0700 (PDT) To: Kees Cook Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Shuah Khan From: Shuah Khan Subject: BUG: lkdtm stack-entropy.sh test hangs Message-ID: <38ca8e69-1385-6035-5ac4-2ef45cfc8141@linuxfoundation.org> Date: Mon, 12 Jul 2021 12:31:28 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Kees, lkdtm stack-entropy.sh test hangs on Linux 5,14-rc1 - I tried root and non-root cases. Both hang. # selftests: lkdtm: stack-entropy.sh # ./stack-entropy.sh: 13: cannot create /sys/kernel/debug/provoke-crash/DIRECT: Permission denied If you have a fix for this, I would like to get this in soon. thanks, -- Shuah