diff options
| author | Zenghui Yu (Huawei) <zenghui.yu@linux.dev> | 2026-03-17 19:57:48 +0800 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2026-03-17 13:40:00 +0000 |
| commit | 0496acc42fb51eee040b5170cec05cec41385540 (patch) | |
| tree | 7a691477ad54d4f844f27652eb57d05bcd398b89 | |
| parent | 1744a6ef48b9a48f017e3e1a0d05de0a6978396e (diff) | |
KVM: arm64: Fix the descriptor address in __kvm_at_swap_desc()
Using "(u64 __user *)hva + offset" to get the virtual addresses of S1/S2
descriptors looks really wrong, if offset is not zero. What we want to get
for swapping is hva + offset, not hva + offset*8. ;-)
Fix it.
Fixes: f6927b41d573 ("KVM: arm64: Add helper for swapping guest descriptor")
Signed-off-by: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
Link: https://patch.msgid.link/20260317115748.47332-1-zenghui.yu@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
| -rw-r--r-- | arch/arm64/kvm/at.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/at.c b/arch/arm64/kvm/at.c index c5c5644b1878..a024d9a770dc 100644 --- a/arch/arm64/kvm/at.c +++ b/arch/arm64/kvm/at.c @@ -1753,7 +1753,7 @@ int __kvm_at_swap_desc(struct kvm *kvm, gpa_t ipa, u64 old, u64 new) if (!writable) return -EPERM; - ptep = (u64 __user *)hva + offset; + ptep = (void __user *)hva + offset; if (cpus_have_final_cap(ARM64_HAS_LSE_ATOMICS)) r = __lse_swap_desc(ptep, old, new); else |