arm/arm64: KVM: Take mmap_sem in kvm_arch_prepare_memory_region

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commit 72f310481a upstream.

We don't hold the mmap_sem while searching for VMAs (via find_vma), in
kvm_arch_prepare_memory_region, which can end up in expected failures.

Fixes: commit 8eef91239e ("arm/arm64: KVM: map MMIO regions at creation time")
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Eric Auger <eric.auger@rehat.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
[ Handle dirty page logging failure case ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Marc Zyngier 2017-03-16 18:20:50 +00:00 • committed by Greg Kroah-Hartman

parent 48f2825abc

commit a1ea318936

1 changed files with 8 additions and 3 deletions

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arch/arm/kvm/mmu.c

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