[Bug 216026] Fails to compile using gcc 12.1 under Ubuntu 22.04

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216026

Sean Christopherson (seanjc@google.com) changed:

           What    |Removed                     |Added
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                 CC|                            |seanjc@google.com

--- Comment #3 from Sean Christopherson (seanjc@google.com) ---
Some of the GCC-12 errors, including this one[*], are likely GCC bugs.  The KVM
code has existed for many, many years, i.e. this wasn't something introduced in
v5.18.  I am working on a small series to guard against KVM bugs in this area,
which will in theory squash this warning, but unless someone can prove that an
out-of-bounds access really truly is possible, I doubt any "fix" for this will
be backported to already-released kernels.

Your best bet is to build with CONFIG_WERROR=n and CONFIG_KVM_WERROR=n so that
GCC-12's zealotry doesn't break the build.

[*] https://lore.kernel.org/all/YofQlBrlx18J7h9Y@google.com

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