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| author | Zenghui Yu <yuzenghui@huawei.com> | 2019-10-29 10:19:19 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2019-10-29 16:47:39 +0300 |
| commit | ca185b260951d3b55108c0b95e188682d8a507b7 (patch) | |
| tree | 478a1020713a0cf0bb46568973f6dea49c86f539 /mm/debug_page_ref.c | |
| parent | bad36e4e8cdc9048948490293efefdbd85c40ecc (diff) | |
| download | linux-ca185b260951d3b55108c0b95e188682d8a507b7.tar.xz | |
KVM: arm/arm64: vgic: Don't rely on the wrong pending table
It's possible that two LPIs locate in the same "byte_offset" but target
two different vcpus, where their pending status are indicated by two
different pending tables. In such a scenario, using last_byte_offset
optimization will lead KVM relying on the wrong pending table entry.
Let us use last_ptr instead, which can be treated as a byte index into
a pending table and also, can be vcpu specific.
Fixes: 280771252c1b ("KVM: arm64: vgic-v3: KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES")
Cc: stable@vger.kernel.org
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20191029071919.177-4-yuzenghui@huawei.com
Diffstat (limited to 'mm/debug_page_ref.c')
0 files changed, 0 insertions, 0 deletions