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diff --git a/sys/kern/kern_proc.c b/sys/kern/kern_proc.c
--- a/sys/kern/kern_proc.c
+++ b/sys/kern/kern_proc.c
@@ -2678,6 +2678,12 @@
kve->kve_protection |= KVME_PROT_WRITE;
if (entry->protection & VM_PROT_EXECUTE)
kve->kve_protection |= KVME_PROT_EXEC;
+ if (entry->max_protection & VM_PROT_READ)
+ kve->kve_protection |= KVME_MAX_PROT_READ;
+ if (entry->max_protection & VM_PROT_WRITE)
+ kve->kve_protection |= KVME_MAX_PROT_WRITE;
+ if (entry->max_protection & VM_PROT_EXECUTE)
+ kve->kve_protection |= KVME_MAX_PROT_EXEC;
if (entry->eflags & MAP_ENTRY_COW)
kve->kve_flags |= KVME_FLAG_COW;
diff --git a/sys/sys/user.h b/sys/sys/user.h
--- a/sys/sys/user.h
+++ b/sys/sys/user.h
@@ -506,6 +506,9 @@
#define KVME_PROT_READ 0x00000001
#define KVME_PROT_WRITE 0x00000002
#define KVME_PROT_EXEC 0x00000004
+#define KVME_MAX_PROT_READ 0x00010000
+#define KVME_MAX_PROT_WRITE 0x00020000
+#define KVME_MAX_PROT_EXEC 0x00040000
#define KVME_FLAG_COW 0x00000001
#define KVME_FLAG_NEEDS_COPY 0x00000002

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