[Bug 215995] New: error: array subscript 32 is above array bounds of ‘long unsigned int[17]’

[bugzilla-daemon@xxxxxxxxxx]

https://bugzilla.kernel.org/show_bug.cgi?id=215995

            Bug ID: 215995
           Summary: error: array subscript 32 is above array bounds of
                    ‘long unsigned int[17]’
           Product: Virtualization
           Version: unspecified
    Kernel Version: 5.18.0-rc7
          Hardware: AMD
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx
          Reporter: ionut_n2001@xxxxxxxxx
        Regression: No

Hi Kernel Team,

Today i notice one error on compiling kernel in kvm area.

Error:
  CC [M]  arch/x86/kvm/svm/svm_onhyperv.o
  CHK     kernel/kheaders_data.tar.xz
In function ‘reg_read’,
    inlined from ‘reg_rmw’ at arch/x86/kvm/emulate.c:266:2,
    inlined from ‘decode_register’ at arch/x86/kvm/emulate.c:985:7:
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 ‘decode_register’:
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[4]: *** [scripts/Makefile.build:288: arch/x86/kvm/emulate.o] Error 1
make[4]: *** Waiting for unfinished jobs....
  CHK     include/generated/compile.h
make[3]: *** [scripts/Makefile.build:550: arch/x86/kvm] Error 2
make[2]: *** [Makefile:1882: arch/x86] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [scripts/Makefile.package:66: binrpm-pkg] Error 2
make: *** [Makefile:1588: binrpm-pkg] Error 2


cat /etc/os-release 
NAME="openSUSE Tumbleweed"
# VERSION="20220516"
ID="opensuse-tumbleweed"
ID_LIKE="opensuse suse"
VERSION_ID="20220516"
PRETTY_NAME="openSUSE Tumbleweed"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:opensuse:tumbleweed:20220516"
BUG_REPORT_URL="https://bugs.opensuse.org";
HOME_URL="https://www.opensuse.org/";
DOCUMENTATION_URL="https://en.opensuse.org/Portal:Tumbleweed";
LOGO="distributor-logo-Tumbleweed"

gcc --version
gcc (SUSE Linux) 12.1.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

ldd --version
ldd (GNU libc) 2.35
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.

CONFIG_KVM_WERROR=y

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