Re: [PATCH 01/05] svcrdma: Verify read-list fits within RPCSVC_MAXPAGES

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At 09:56 AM 5/20/2008, J. Bruce Fields wrote:
>> MHO is that it's important but not urgent, and it should be part of a later
>> change. At Connectathon, no clients were sending any problematic requests,
>> so I think it's unlikely this will affect us in the wild, for now. 
>
>Somewhere in the documentation, a really clear warning about the
>security assumptions would be useful.  It could also help if the howto
>(on the web and in Documentation/filesystems/nfs-rdma.txt) included any
>instructions on necessary firewalling, etc.

Agreed. The kernel (/proc) parameters are part of this, and it's time to
spell them all out as well.

The protocol hardening we're talking about above isn't a security issue,
of course. It's just basic and part of the implementation. The client, btw,
has some fairly strict checking.

>By the way, the Kconfig help text for SUNRPC_XPRT_RDMA looks like it
>needs an update to mention the server?

You're right - it only mentions the client. I thought we added that text when
we simplified/collapsed the config.

Tom.

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