On Fri, 2023-03-10 at 14:33 +0100, Greg Kroah-Hartman wrote:
> From: Sean Christopherson <seanjc@xxxxxxxxxx>
>
> [ Upstream commit e4a9af799e5539b0feb99571f0aaed5a3c81dc5a ]
>
> For commands with small input/output buffers, use the local stack to
> "allocate" the structures used to communicate with the PSP. Now that
> __sev_do_cmd_locked() gracefully handles vmalloc'd buffers, there's no
> reason to avoid using the stack, e.g. CONFIG_VMAP_STACK=y will just work.
[...]
Julien Cristau reported a regression in ccp - the
WARN_ON_ONCE(!virt_addr_valid(data)) is now being triggered. I believe
this was introduced by the above commit, which depends on:
commit 8347b99473a313be6549a5b940bc3c56a71be81c
Author: Sean Christopherson <seanjc@xxxxxxxxxx>
Date: Tue Apr 6 15:49:48 2021 -0700
crypto: ccp: Play nice with vmalloc'd memory for SEV command structs
Ben.
--
Ben Hutchings
The two most common things in the universe are hydrogen and stupidity.
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