From: Sebastian Ene <sebastianene@google.com>
To: catalin.marinas@arm.com, joey.gouly@arm.com,
kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, maz@kernel.org,
oliver.upton@linux.dev, sebastianene@google.com,
suzuki.poulose@arm.com, will@kernel.org, yuzenghui@huawei.com
Cc: stable@vger.kernel.org
Subject: [PATCH v2 1/1] KVM: arm64: Fix the upper limit of the walker range
Date: Tue, 14 Jan 2025 15:04:08 +0000 [thread overview]
Message-ID: <20250114150407.566762-2-sebastianene@google.com> (raw)
Prevent the walker from running into weeds when walking an
entire address range.
Fixes: b1e57de62cfb4 ("KVM: arm64: Add stand-alone page-table walker
infrastructure")
Cc: stable@vger.kernel.org
Signed-off-by: Sebastian Ene <sebastianene@google.com>
---
arch/arm64/kvm/hyp/pgtable.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c
index 40bd55966..2ffb5571e 100644
--- a/arch/arm64/kvm/hyp/pgtable.c
+++ b/arch/arm64/kvm/hyp/pgtable.c
@@ -260,7 +260,7 @@ static int _kvm_pgtable_walk(struct kvm_pgtable *pgt, struct kvm_pgtable_walk_da
{
u32 idx;
int ret = 0;
- u64 limit = BIT(pgt->ia_bits);
+ u64 limit = BIT(pgt->ia_bits) - 1;
if (data->addr > limit || data->end > limit)
return -ERANGE;
--
2.47.1.688.g23fc6f90ad-goog
reply other threads:[~2025-01-14 15:04 UTC|newest]
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