Warning: Permanently added '10.128.0.243' (ED25519) to the list of known hosts.
[*] Starting reproducer for circular locking in cgroup_kn_lock_live...
[+] Detected cgroup mount options: blkio,devices,freezer,net_prio
[+] mkdir /tmp/cg successful.
[+] mount cgroup v1 successful.
[+] mkdir /tmp/cg/sub successful (cgroup_mutex -> rtnl_mutex established).
[+] open /sys/module/block2mtd/parameters/block2mtd successful.
[+] write path '/tmp/cg/nonexistent_mtd_bdev
' to block2mtd successful.
[+] write path '/dev/nonexistent_mtd_bdev
' to block2mtd successful (param_lock -> i_mutex_dir_key established).
[+] close block2mtd param_fd successful.
[+] rmdir /tmp/cg/sub successful (lockdep cycle triggered!).
[  140.609293][ T6051] block2mtd: error: cannot open device /tmp/cg/nonexistent_mtd_bdev
[  140.610277][ T6051] block2mtd: error: cannot open device /dev/nonexistent_mtd_bdev
[+] umount2 /tmp/cg successful.
[+] rmdir /tmp/cg successful.
[+] Reproducer finished successfully.