linux-kernel - [PATCH v1 0/2] KVM: s390: Fix two bugs

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: <20250805111446.40937-1-imbrenda@linux.ibm.com>
Date: Tue,  5 Aug 2025 13:14:44 +0200
From: Claudio Imbrenda <imbrenda@...ux.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: linux-s390@...r.kernel.org, kvm@...r.kernel.org, david@...hat.com,
        frankja@...ux.ibm.com, seiden@...ux.ibm.com, nsg@...ux.ibm.com,
        nrb@...ux.ibm.com, schlameuss@...ux.ibm.com, hca@...ux.ibm.com,
        mhartmay@...ux.ibm.com, borntraeger@...ibm.com
Subject: [PATCH v1 0/2] KVM: s390: Fix two bugs

This small series fixes two bugs in s390 KVM. One is small and trivial,
the other is pretty bad.

* The wrong type of flag was being passed to vcpu_dat_fault_handler();
  it expects a FOLL_* flag, but a FAULT_FLAG_* was passed instead.
* Due to incorrect usage of mmu_notifier_register(), in some rare cases
  when running a secure guest, the struct mm for the userspace process
  would get freed too early and cause a use-after-free.

Claudio Imbrenda (2):
  KVM: s390: Fix incorrect usage of mmu_notifier_register()
  KVM: s390: Fix FOLL_*/FAULT_FLAG_* confusion

 arch/s390/kvm/kvm-s390.c |  8 ++++----
 arch/s390/kvm/pv.c       | 14 +++++++++-----
 2 files changed, 13 insertions(+), 9 deletions(-)

-- 
2.50.1