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

[bugzilla-daemon@xxxxxxxxxx]

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

            Bug ID: 216026
           Summary: Fails to compile using gcc 12.1 under Ubuntu 22.04
           Product: Virtualization
           Version: unspecified
    Kernel Version: 5.18
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx
          Reporter: nanook@xxxxxxxxxx
        Regression: No

Created attachment 301039
  --> https://bugzilla.kernel.org/attachment.cgi?id=301039&action=edit
The .config tried to build against, did a make mrproper first.

CC      arch/x86/kvm/../../../virt/kvm/kvm_main.o
  CC      arch/x86/kvm/../../../virt/kvm/eventfd.o
  CC      arch/x86/kvm/../../../virt/kvm/binary_stats.o
  CC      arch/x86/kvm/../../../virt/kvm/vfio.o
  CC      arch/x86/kvm/../../../virt/kvm/coalesced_mmio.o
  CC      arch/x86/kvm/../../../virt/kvm/async_pf.o
  CC      arch/x86/kvm/../../../virt/kvm/irqchip.o
  CC      arch/x86/kvm/../../../virt/kvm/dirty_ring.o
  CC      arch/x86/kvm/../../../virt/kvm/pfncache.o
  CC      arch/x86/kvm/x86.o
  CC      arch/x86/kvm/emulate.o
In function ‘reg_read’,
    inlined from ‘reg_rmw’ at arch/x86/kvm/emulate.c:266:2:
arch/x86/kvm/emulate.c:254:27: error: array subscript 32 is above array bounds
of ‘long unsigned int[17]’ [-Werror=array-bounds]
  254 |         return ctxt->_regs[nr];
      |                ~~~~~~~~~~~^~~~
In file included from arch/x86/kvm/emulate.c:23:
arch/x86/kvm/kvm_emulate.h: In function ‘reg_rmw’:
arch/x86/kvm/kvm_emulate.h:366:23: note: while referencing ‘_regs’
  366 |         unsigned long _regs[NR_VCPU_REGS];
      |                       ^~~~~
cc1: all warnings being treated as errors
make[5]: *** [scripts/Makefile.build:288: arch/x86/kvm/emulate.o] Error 1
make[4]: *** [scripts/Makefile.build:550: arch/x86/kvm] Error 2
make[3]: *** [Makefile:1834: arch/x86] Error 2
make[2]: *** [debian/rules:7: build-arch] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
make[1]: *** [scripts/Makefile.package:83: bindeb-pkg] Error 2
make: *** [Makefile:1542: bindeb-pkg] Error 2

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