Author: kib
Date: Wed Sep 17 18:49:57 2014
New Revision: 271716
URL: http://svnweb.freebsd.org/changeset/base/271716
Log:
Presence of any VM_PROT bits in the permission argument on x86 implies
that the entry is readable and valid.
Reported by: markj
Submitted by: alc
Tested by: pho (previous version), markj
MFC after: 3 days
Modified:
head/sys/amd64/amd64/pmap.c
head/sys/i386/i386/pmap.c
Modified: head/sys/amd64/amd64/pmap.c
==============================================================================
--- head/sys/amd64/amd64/pmap.c Wed Sep 17 18:46:51 2014 (r271715)
+++ head/sys/amd64/amd64/pmap.c Wed Sep 17 18:49:57 2014 (r271716)
@@ -3845,7 +3845,8 @@ pmap_protect(pmap_t pmap, vm_offset_t sv
pt_entry_t *pte, PG_G, PG_M, PG_RW, PG_V;
boolean_t anychanged, pv_lists_locked;
- if ((prot & VM_PROT_READ) == VM_PROT_NONE) {
+ KASSERT((prot & ~VM_PROT_ALL) == 0, ("invalid prot %x", prot));
+ if (prot == VM_PROT_NONE) {
pmap_remove(pmap, sva, eva);
return;
}
Modified: head/sys/i386/i386/pmap.c
==============================================================================
--- head/sys/i386/i386/pmap.c Wed Sep 17 18:46:51 2014 (r271715)
+++ head/sys/i386/i386/pmap.c Wed Sep 17 18:49:57 2014 (r271716)
@@ -3161,7 +3161,8 @@ pmap_protect(pmap_t pmap, vm_offset_t sv
pt_entry_t *pte;
boolean_t anychanged, pv_lists_locked;
- if ((prot & VM_PROT_READ) == VM_PROT_NONE) {
+ KASSERT((prot & ~VM_PROT_ALL) == 0, ("invalid prot %x", prot));
+ if (prot == VM_PROT_NONE) {
pmap_remove(pmap, sva, eva);
return;
}
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