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-rw-r--r--sys/amd64/amd64/pmap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 2b3c10f..aa20133 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -4973,7 +4973,7 @@ pmap_demote_DMAP(vm_paddr_t base, vm_size_t len, boolean_t invalidate)
KASSERT(powerof2(len), ("pmap_demote_DMAP: len is not a power of 2"));
KASSERT((base & (len - 1)) == 0,
("pmap_demote_DMAP: base is not a multiple of len"));
- if (len < NBPDP) {
+ if (len < NBPDP && base < dmaplimit) {
va = PHYS_TO_DMAP(base);
changed = FALSE;
PMAP_LOCK(kernel_pmap);
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