Author: alc
Date: Sat Oct 30 23:49:37 2010
New Revision: 214576
URL: http://svn.freebsd.org/changeset/base/214576
Log:
Add another safety belt to pmap_demote_DMAP().
Modified:
head/sys/amd64/amd64/pmap.c
Modified: head/sys/amd64/amd64/pmap.c
==============================================================================
--- head/sys/amd64/amd64/pmap.c Sat Oct 30 23:09:56 2010 (r214575)
+++ head/sys/amd64/amd64/pmap.c Sat Oct 30 23:49:37 2010 (r214576)
@@ -4973,7 +4973,7 @@ pmap_demote_DMAP(vm_paddr_t base, vm_siz
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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