linux-kernel - [PATCH v2 00/23] SRSO fixes/cleanups

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: <cover.1692919072.git.jpoimboe@kernel.org>
Date:   Fri, 25 Aug 2023 00:01:31 -0700
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Babu Moger <babu.moger@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>, David.Kaplan@....com,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Nikolay Borisov <nik.borisov@...e.com>,
        gregkh@...uxfoundation.org, Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 00/23] SRSO fixes/cleanups

v2:
- reorder everything: fixes/functionality before cleanups
- split up KVM patch, add Sean's changes
- add patch to support live migration
- remove "default:" case for enums throughout bugs.c
- various minor tweaks based on v1 discussions with Boris
- add Reviewed-by's

Josh Poimboeuf (23):
  x86/srso: Fix srso_show_state() side effect
  x86/srso: Set CPUID feature bits independently of bug or mitigation
    status
  x86/srso: Don't probe microcode in a guest
  KVM: x86: Add IBPB_BRTYPE support
  KVM: x86: Add SBPB support
  x86/srso: Fix SBPB enablement for spec_rstack_overflow=off
  x86/srso: Fix SBPB enablement for (possible) future fixed HW
  x86/srso: Print actual mitigation if requested mitigation isn't
    possible
  x86/srso: Print mitigation for retbleed IBPB case
  x86/srso: Fix vulnerability reporting for missing microcode
  x86/srso: Fix unret validation dependencies
  x86/alternatives: Remove faulty optimization
  x86/srso: Improve i-cache locality for alias mitigation
  x86/srso: Unexport untraining functions
  x86/srso: Remove 'pred_cmd' label
  x86/bugs: Remove default case for fully switched enums
  x86/srso: Move retbleed IBPB check into existing 'has_microcode' code
    block
  x86/srso: Remove redundant X86_FEATURE_ENTRY_IBPB check
  x86/srso: Disentangle rethunk-dependent options
  x86/rethunk: Use SYM_CODE_START[_LOCAL]_NOALIGN macros
  x86/retpoline: Remove .text..__x86.return_thunk section
  x86/nospec: Refactor UNTRAIN_RET[_*]
  x86/calldepth: Rename __x86_return_skl() to call_depth_return_thunk()

 Documentation/admin-guide/hw-vuln/srso.rst |  22 ++-
 arch/x86/include/asm/nospec-branch.h       |  69 ++++-----
 arch/x86/include/asm/processor.h           |   2 -
 arch/x86/kernel/alternative.c              |   8 -
 arch/x86/kernel/cpu/amd.c                  |  28 ++--
 arch/x86/kernel/cpu/bugs.c                 | 104 ++++++-------
 arch/x86/kernel/vmlinux.lds.S              |  10 +-
 arch/x86/kvm/cpuid.c                       |   5 +-
 arch/x86/kvm/cpuid.h                       |   3 +-
 arch/x86/kvm/x86.c                         |  29 +++-
 arch/x86/lib/retpoline.S                   | 171 +++++++++++----------
 include/linux/objtool.h                    |   3 +-
 scripts/Makefile.vmlinux_o                 |   3 +-
 13 files changed, 230 insertions(+), 227 deletions(-)

-- 
2.41.0