On 13/12/21 10:12 pm, Sachin Sant wrote:
Mitigation patching test iterates over a set of mitigations irrespective
of whether a certain mitigation is supported/available in the kernel.
This causes following messages on a kernel where some mitigations
are unavailable:
Spawned threads enabling/disabling mitigations ...
cat: entry_flush: No such file or directory
cat: uaccess_flush: No such file or directory
Waiting for timeout ...
OK
This patch adds a check for available mitigations in the kernel.
Reported-by: Nageswara R Sastry <rnsas...@linux.ibm.com>
Signed-off-by: Sachin Sant <sach...@linux.vnet.ibm.com>
Tested-by: Nageswara R Sastry <rnsas...@linux.ibm.com>
---
diff -Naurp aa/tools/testing/selftests/powerpc/security/mitigation-patching.sh
bb/tools/testing/selftests/powerpc/security/mitigation-patching.sh
--- aa/tools/testing/selftests/powerpc/security/mitigation-patching.sh
2021-12-13 10:17:05.714127154 -0500
+++ bb/tools/testing/selftests/powerpc/security/mitigation-patching.sh
2021-12-13 10:19:32.575315913 -0500
@@ -44,7 +44,10 @@ mitigations="barrier_nospec stf_barrier
for m in $mitigations
do
- do_one "$m" &
+ if [[ -f /sys/kernel/debug/powerpc/$m ]]
+ then
+ do_one "$m" &
+ fi
done
echo "Spawned threads enabling/disabling mitigations ..."
--
Thanks and Regards
R.Nageswara Sastry
