Abort a dirty ring reset if the current task has a pending signal, as the
hard limit of INT_MAX entries doesn't ensure KVM will respond to a signal
in a timely fashion.
Fixes: fb04a1eddb1a ("KVM: X86: Implement ring-based dirty memory tracking")
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
virt/kvm/dirty_ring.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/virt/kvm/dirty_ring.c b/virt/kvm/dirty_ring.c
index 2faf894dec5a..a81ad17d5eef 100644
--- a/virt/kvm/dirty_ring.c
+++ b/virt/kvm/dirty_ring.c
@@ -117,6 +117,9 @@ int kvm_dirty_ring_reset(struct kvm *kvm, struct kvm_dirty_ring *ring,
cur_slot = cur_offset = mask = 0;
while (likely((*nr_entries_reset) < INT_MAX)) {
+ if (signal_pending(current))
+ return -EINTR;
+
entry = &ring->dirty_gfns[ring->reset_index & (ring->size - 1)];
if (!kvm_dirty_gfn_harvested(entry))
--
2.47.1.613.gc27f4b7a9f-goog
