diff options
| author |   otto <otto@openbsd.org> | 2009-11-24 10:35:56 +0000 |
|---|---|---|
| committer | otto <otto@openbsd.org> | 2009-11-24 10:35:56 +0000 |
| commit | b9e718d46a0d88c60388e543bbe738e610a989d4 (patch) | |
| tree | 4e67388b4b21055b1f429581a0f5dcb7dec37abf /sys/uvm/uvm_unix.c | |
| parent | kill some old cruft, in particular -F conflicts has never worked... (diff) | |
| download | wireguard-openbsd-b9e718d46a0d88c60388e543bbe738e610a989d4.tar.xz wireguard-openbsd-b9e718d46a0d88c60388e543bbe738e610a989d4.zip | |
Proper check for wrapping high address and setting the break below the
base of data; with nicm@ ok miod@ guenther@
Diffstat (limited to 'sys/uvm/uvm_unix.c')
| -rw-r--r-- | sys/uvm/uvm_unix.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/sys/uvm/uvm_unix.c b/sys/uvm/uvm_unix.c index 45c9f192558..ec7922cd9f3 100644 --- a/sys/uvm/uvm_unix.c +++ b/sys/uvm/uvm_unix.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_unix.c,v 1.39 2009/06/17 22:19:12 kettenis Exp $ */ +/* $OpenBSD: uvm_unix.c,v 1.40 2009/11/24 10:35:56 otto Exp $ */ /* $NetBSD: uvm_unix.c,v 1.18 2000/09/13 15:00:25 thorpej Exp $ */ /* @@ -73,15 +73,15 @@ sys_obreak(struct proc *p, void *v, register_t *retval) syscallarg(char *) nsize; } */ *uap = v; struct vmspace *vm = p->p_vmspace; - vaddr_t new, old; + vaddr_t new, old, base; int error; - old = (vaddr_t)vm->vm_daddr; + base = (vaddr_t)vm->vm_daddr; new = round_page((vaddr_t)SCARG(uap, nsize)); - if ((new - old) > p->p_rlimit[RLIMIT_DATA].rlim_cur) + if (new < base || (new - base) > p->p_rlimit[RLIMIT_DATA].rlim_cur) return (ENOMEM); - old = round_page(old + ptoa(vm->vm_dsize)); + old = round_page(base + ptoa(vm->vm_dsize)); if (new == old) return (0); |