From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leonardo Bras Date: Tue, 26 Nov 2019 22:36:29 +0000 Subject: [PATCH v3 0/2] Replace current->mm by kvm->mm on powerpc/kvm Message-Id: <20191126223631.389779-1-leonardo@linux.ibm.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Paul Mackerras , Benjamin Herrenschmidt , Michael Ellerman Cc: Leonardo Bras , kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Replace current->mm by kvm->mm on powerpc/kvm By replacing, we would reduce the use of 'global' current on code, relying more in the contents of kvm struct. On code, I found that in kvm_create_vm() there is: kvm->mm = current->mm; And that on every kvm_*_ioctl we have tests like that: if (kvm->mm != current->mm) return -EIO; So this change would be safe. --- Changes since v2: - Rebased on torvalds/master and updated the remaining patches. Changes since v1: - Fixes possible 'use after free' on kvm_spapr_tce_release (from v1) - Fixes possible 'use after free' on kvm_vm_ioctl_create_spapr_tce - Fixes undeclared variable error Leonardo Bras (2): powerpc/kvm/book3s: Replace current->mm by kvm->mm powerpc/kvm/book3e: Replace current->mm by kvm->mm arch/powerpc/kvm/book3s_64_mmu_hv.c | 4 ++-- arch/powerpc/kvm/book3s_64_vio.c | 10 ++++++---- arch/powerpc/kvm/book3s_hv.c | 10 +++++----- arch/powerpc/kvm/booke.c | 2 +- 4 files changed, 14 insertions(+), 12 deletions(-) -- 2.23.0