diff options
| author | Dag-Erling Smørgrav <des@FreeBSD.org> | 2013-06-18 07:02:35 +0000 |
|---|---|---|
| committer | Dag-Erling Smørgrav <des@FreeBSD.org> | 2013-06-18 07:02:35 +0000 |
| commit | 5b3e02570aad765ee54aa9ba564aa97f52101227 (patch) | |
| tree | 128a935a2ea1cc348d2df9fe239a666ee16d9f5d /sys/vm | |
| parent | 51091a07630097929e461d81930d3d01a2f3c3d4 (diff) | |
Notes
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_map.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c index a9ae8030dde9..1fee839b9895 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -3807,6 +3807,12 @@ RetryLookup:; vm_map_unlock_read(map); return (KERN_PROTECTION_FAILURE); } + if ((fault_typea & VM_PROT_COPY) != 0 && + (entry->max_protection & VM_PROT_WRITE) == 0 && + (entry->eflags & MAP_ENTRY_COW) == 0) { + vm_map_unlock_read(map); + return (KERN_PROTECTION_FAILURE); + } /* * If this page is not pageable, we have to get it for all possible |