Created attachment 257821 [details] OOM / kernel panic screenshot Attaching the OOM / kernel panic screenshot. Steps to reproduce: cryptsetup open /dev/sdX[Y] rand --type plain --key-file /dev/random blkdiscard -z /dev/mapper/rand Similar issue is NOT found in doing `cat /dev/zero > /dev/mapper/rand` on the same hardware and configuration. The issue has been observed on both a usb thumb drive (BOT only) and a SATA drive on a UAS adapter. For reasons I have no capacity to attach the SATA drive to an AHCI controller so I cannot confirm whether or not it occurs only to USB drives.