The kernel is in lockdown mode when secureboot is enabled and hence debugfs cannot be used. But the error printed after running tests does not indicate this currently:
TAP version 13 1..6 # selftests: damon: debugfs_attrs.sh # cat: /sys/kernel/debug/damon/monitor_on: Operation not permitted # _debugfs_common.sh: line 48: [: =: unary operator expected # cat: /sys/kernel/debug/damon/attrs: Operation not permitted # _debugfs_common.sh: line 11: /sys/kernel/debug/damon/attrs: Operation not permitted # writing 1 2 3 4 5 to /sys/kernel/debug/damon/attrs doesn't return 0 # expected because: valid input # _debugfs_common.sh: line 16: /sys/kernel/debug/damon/attrs: Operation not permitted not ok 1 selftests: damon: debugfs_attrs.sh # exit=1
After adding the check for secureboot, the output is as follows:
TAP version 13 1..6 # selftests: damon: debugfs_attrs.sh # debugfs cannot work with secureboot enabled not ok 1 selftests: damon: debugfs_attrs.sh # exit=1
Signed-off-by: Gautam gautammenghani201@gmail.com --- tools/testing/selftests/damon/_chk_dependency.sh | 10 ++++++++++ 1 file changed, 10 insertions(+) mode change 100644 => 100755 tools/testing/selftests/damon/_chk_dependency.sh
diff --git a/tools/testing/selftests/damon/_chk_dependency.sh b/tools/testing/selftests/damon/_chk_dependency.sh old mode 100644 new mode 100755 index 0189db81550b..6e45c1fe230e --- a/tools/testing/selftests/damon/_chk_dependency.sh +++ b/tools/testing/selftests/damon/_chk_dependency.sh @@ -26,3 +26,13 @@ do exit 1 fi done + +secureboot_error="Operation not permitted" +for f in attrs target_ids monitor_on +do + status=$( cat "$DBGFS/$f" 2>&1 ) + if [ "${status#*$secureboot_error}" != "$status" ]; then + echo "debugfs cannot work with secureboot enabled" + exit 1 + fi +done