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bug#29895: Parted 3.2 accessing /dev/mmcblk0rpmb considered a bug?

From: Ceriel Jacobs
Subject: bug#29895: Parted 3.2 accessing /dev/mmcblk0rpmb considered a bug?
Date: Fri, 29 Dec 2017 15:00:54 +0100
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:52.0) Gecko/20100101 Thunderbird/52.5.2

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
Parted (GNU parted) 3.2 still tries to access the RPMB:

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

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?

Cheers, Ceriel

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