Opening debugfs files fails with an error: Operation not permitted.

Issue

• Opening debugfs files fails with an error: Operation not permitted.

# cat /sys/kernel/debug/sched_features
cat: /sys/kernel/debug/sched_features: Operation not permitted

# ls -l /sys/kernel/debug/sched_features
-rw-r--r--. 1 root root 0 Jun  3 03:03 /sys/kernel/debug/sched_features

# id
uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

• Changing file permissionsand ownership ofdebugfsfails with an error:Operation not permitted`.

# ls -l /sys/kernel/debug/sched_features
-rw-r--r--. 1 root root 0 Jun  3 03:18 /sys/kernel/debug/sched_features

# chmod 777 /sys/kernel/debug/sched_features
chmod: changing permissions of '/sys/kernel/debug/sched_features': Operation not permitted

# chown root:root /sys/kernel/debug/sched_features
chown: changing ownership of '/sys/kernel/debug/sched_features': Operation not permitted