Re: [PATCH] KVM: arm64: Retry fault if vma_lookup() results become invalid

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, 13 Mar 2023 16:54:54 -0700, David Matlack wrote:
> Read mmu_invalidate_seq before dropping the mmap_lock so that KVM can
> detect if the results of vma_lookup() (e.g. vma_shift) become stale
> before it acquires kvm->mmu_lock. This fixes a theoretical bug where a
> VMA could be changed by userspace after vma_lookup() and before KVM
> reads the mmu_invalidate_seq, causing KVM to install page table entries
> based on a (possibly) no-longer-valid vma_shift.
> 
> [...]

Applied to kvmarm/fixes, thanks!

[1/1] KVM: arm64: Retry fault if vma_lookup() results become invalid
      https://git.kernel.org/kvmarm/kvmarm/c/13ec9308a857

--
Best,
Oliver



[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux