Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB VNCR TLB invalidation occurs from MMU notifiers or TLBI instructions, and either can race against a vcpu not being onlined yet (no pseudo-TLB allocated). Similarly, the TLB might be invalid, and the invalidation should be skipped in this case. Both kvm_invalidate_vncr_ipa() and kvm_invalidate_vncr_va() are expected to perform the same checks, except that the latter doesn't check for the allocation and blindly dereferences the pointer. Solve this by introducing a new iterator built on top of the usual kvm_for_each_vcpu() that checks for both of the above conditions, and convert the two users to it.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 to < 7c73a269a880b1399baacfb9d521415e6ef7ecc2affected4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 to < 5fd30133af864a1de0a0bd87d3fe3cf23205fbc7affected4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 to < 4be6cbeb93d26994bd1827ddbce391e3c4395c8faffected
Linux Linux
Default version status: affected
6.16affected0 to < 6.16unaffected6.18.39 to ≤ 6.18.*unaffected7.1.4 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected