linux-kernel - [PATCH 0/2] kvm: selftests: cleanup PTE definitions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220421162825.1412792-1-pbonzini@redhat.com>
Date:   Thu, 21 Apr 2022 12:28:23 -0400
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     peterx@...hat.com, seanjc@...gle.com
Subject: [PATCH 0/2] kvm: selftests: cleanup PTE definitions

The width of operations on bit fields greater than 32-bit is
implementation defined, and differs between GCC (which uses the bitfield
precision) and clang (which uses 64-bit arithmetic), so this is a
minefield that is already causing bugs (see patch 1).  Remove the bit
fields and using manual masking instead.

Mostly the same as yesterday's patch, but with constants moved to
processor.h and extended to include common idioms such as PAGE_MASK
and PAGE_SIZE.

Paolo

Supersedes: <20220420103624.1143824-1-pbonzini@...hat.com>

Paolo Bonzini (2):
  kvm: selftests: do not use bitfields larger than 32-bits for PTEs
  kvm: selftests: introduce and use more page size-related constants

 .../selftests/kvm/include/x86_64/processor.h  |  17 ++
 .../selftests/kvm/lib/x86_64/processor.c      | 202 +++++++-----------
 tools/testing/selftests/kvm/x86_64/amx_test.c |   1 -
 .../kvm/x86_64/emulator_error_test.c          |   1 -
 tools/testing/selftests/kvm/x86_64/smm_test.c |   2 -
 .../kvm/x86_64/vmx_tsc_adjust_test.c          |   1 -
 .../selftests/kvm/x86_64/xen_shinfo_test.c    |   1 -
 .../selftests/kvm/x86_64/xen_vmcall_test.c    |   1 -
 8 files changed, 99 insertions(+), 127 deletions(-)

-- 
2.31.1