Re: F36 Change: Enable fs-verity in RPM (System-Wide Change proposal)

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> I think there are two cases of interest:
> 
> 1) a file or signature in the rpm is corrupted, the signature doesn't have a matching
> cert installed, etc...
> in this case, if the plugin is present, when you attempt to install the rpm the verity
> enable ioctl will explicitly fail, and presumably so will the rpm install. You can see
> most of the details for this sort of case here in the rpm plugin code:
> https://github.com/rpm-software-management/rpm/blob/master/plugins/fsveri....
> 
> 2) after installation, a file from an fs-verity enabled rpm gets one or more blocks
> corrupted
> The first read of a corrupted block from disk (the good uncorrupted page might survive in
> page cache for a while) will result in EIO for read-like system calls and SIGBUS if the
> file is mapped (executables, mmap).

Thanks for the information. So in the event of an error, it's expected that the user would be informed that the error was due to a rpm-fsverity check and they could potentially reinstall the rpm from a trusted source to resolve the problem? Of course there's the underlying issue of _why_ it happened, but from the standpoint of wanting an immediate path forward.
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