Arch Linux

probackup-nl

Member

From: Delft

Registered: 2017-11-15

Posts: 93

Website

Parted accessing {mmcblk,...}[0-9]rpmb considered a bug?

eMMC spec 4.5 has a tiny (2MiB or 4MiB) Replay Protected Memory Block. As well as UFS and NVMe have support for RPMB. That RPMB area is protected from readwrite access.

The kernel has been patched to not access this rpmb area:

$ dmesg | grep rpmb
[    6.712468] mmcblk0rpmb: mmc0:0001 SEM04G partition 3 2.00 MiB

However parted (GNU parted) 3.2 still tries to access RPMB:

Error: /dev/mmcblk0rpmb: unrecognised disk label
Warning: Error fsyncing/closing /dev/mmcblk0rpmb: Input/output error
Retry/Ignore? 

Resulting in dmesg logged errors like:

[46684.715228] print_req_error: I/O error, dev mmcblk0rpmb, sector 0

Should (GNU) parted be patched too, or not?