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bug#29895: Parted 3.2 accessing /dev/mmcblk0rpmb considered a bug?
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From: |
Ceriel Jacobs |
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Subject: |
bug#29895: Parted 3.2 accessing /dev/mmcblk0rpmb considered a bug? |
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Date: |
Fri, 29 Dec 2017 15:00:54 +0100 |
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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.
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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
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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
Retry/Ignore?
Resulting in dmesg logged errors like:
[46684.715228] print_req_error: I/O error, dev mmcblk0rpmb, sector 0
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Should (GNU) parted be patched too, or not?
Cheers, Ceriel
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