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#! /bin/bash
# Test for uderef. Since a successful test will kill the shell, we
# need to communicate via the filesystem whether the test worked or
# not.
echo 'Directory for test-uderef.sh'
pwd
# If the feature is not compiled into the kernel, fail right away.
if [ ! -f /sys/kernel/debug/provoke-crash/DIRECT ]; then
echo "Kernel was not compiled with CONFIG_LKDTM"
echo "Not possible to test for UDEREF, failing"
echo "test: uderef: fail"
fi
# Put a marker file that we can check later.
touch /tmp/uderef-6256ff7e
cat /sys/kernel/debug/provoke-crash/DIRECT
# If we got this far, we were not killed by the UDEREF blocks in the
# kernel, which means we should go ahead and fail.
rm /tmp/uderef-6256ff7e
echo "Shell was not killed by uderef"
echo "test: uderef: fail"
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