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diff --git a/sys/netpfil/pf/pf_ioctl.c b/sys/netpfil/pf/pf_ioctl.c
--- a/sys/netpfil/pf/pf_ioctl.c
+++ b/sys/netpfil/pf/pf_ioctl.c
@@ -5054,6 +5054,10 @@
for (int i = 0; i < pf_hashmask; i++) {
struct pf_idhash *ih = &V_pf_idhash[i];
+ /* Avoid taking the lock if there are no states in the row. */
+ if (LIST_EMPTY(&ih->states))
+ continue;
+
PF_HASHROW_LOCK(ih);
LIST_FOREACH(s, &ih->states, entry) {
if (s->timeout == PFTM_UNLINKED)

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