diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2009-08-24 22:45:30 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2009-08-24 22:45:30 +0000 |
| commit | 64e1c69ccd4bc6743c9900a2501fb2b4f5b4e764 (patch) | |
| tree | 3c8e1e25ad21da0609ae8f69f1138067bf88f57b /sys/uvm | |
| parent | 79ff2e1a25b342d4c81ef87ee4fe2dfa7b061640 (diff) | |
Properly check for VM_MAX_KERNEL_ADDRESS wraparound in the guard pages code.
ok ariane@
Diffstat (limited to 'sys/uvm')
| -rw-r--r-- | sys/uvm/uvm_map.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/uvm/uvm_map.c b/sys/uvm/uvm_map.c index 938fb3edd16..405c3371263 100644 --- a/sys/uvm/uvm_map.c +++ b/sys/uvm/uvm_map.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_map.c,v 1.121 2009/08/13 20:40:13 ariane Exp $ */ +/* $OpenBSD: uvm_map.c,v 1.122 2009/08/24 22:45:29 miod Exp $ */ /* $NetBSD: uvm_map.c,v 1.86 2000/11/27 08:40:03 chs Exp $ */ /* @@ -742,7 +742,7 @@ uvm_map_p(struct vm_map *map, vaddr_t *startp, vsize_t size, * Try to fully exhaust kva prior to wrap-around. * (This may eat your ram!) */ - if (VM_MAX_KERNEL_ADDRESS < (kva_guardstart + size)) { + if (VM_MAX_KERNEL_ADDRESS - kva_guardstart < size) { static int wrap_counter = 0; printf("uvm_map: kva guard page wrap-around %d\n", ++wrap_counter); |