Invalid message type: 52/53

[xfk]

I've been using the u-root/cpu command. I tried to do a "go build" while "cpu-ed" and get the following error message:

2022/01/30 22:45:26 unknown error: invalid message type: 52
go: RLock /home/xfk/src/cpu/go.mod: input/output error

or sometimes:

2022/01/30 22:45:26 unknown error: invalid message type: 53
go: RLock /home/xfk/src/cpu/go.mod: input/output error

I see those types are not implemented in this library which u-root/cpu uses. (I apologize if I reported the issue in the wrong place)

[hugelgupf]

cc @rminnich

Looks like the T/Rlock message types https://github.com/chaos/diod/blob/master/protocol.md#lock---acquire-or-release-a-posix-record-lock

We'd never needed this in gVisor, so we never implemented it. Should be easy.

[rminnich]

Please see my latest PR. And help me fix fuzzing ;-)

[hugelgupf]

My bad, I should be taking care of issues. https://github.com/hugelgupf/p9/pull/52 implemented this.