diff options
Diffstat (limited to 'sys/uvm/uvm_unix.c')
| -rw-r--r-- | sys/uvm/uvm_unix.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sys/uvm/uvm_unix.c b/sys/uvm/uvm_unix.c index 0506b6fd81d..8f7ce154295 100644 --- a/sys/uvm/uvm_unix.c +++ b/sys/uvm/uvm_unix.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_unix.c,v 1.69 2020/10/13 08:47:59 mpi Exp $ */ +/* $OpenBSD: uvm_unix.c,v 1.70 2020/10/19 08:19:46 mpi Exp $ */ /* $NetBSD: uvm_unix.c,v 1.18 2000/09/13 15:00:25 thorpej Exp $ */ /* @@ -108,19 +108,22 @@ void uvm_grow(struct proc *p, vaddr_t sp) { struct vmspace *vm = p->p_vmspace; + vm_map_t map = &vm->vm_map; int si; /* For user defined stacks (from sendsig). */ if (sp < (vaddr_t)vm->vm_maxsaddr) return; + vm_map_lock(map); + /* For common case of already allocated (from trap). */ #ifdef MACHINE_STACK_GROWS_UP if (sp < (vaddr_t)vm->vm_maxsaddr + ptoa(vm->vm_ssize)) #else if (sp >= (vaddr_t)vm->vm_minsaddr - ptoa(vm->vm_ssize)) #endif - return; + goto out; /* Really need to check vs limit and increment stack size if ok. */ #ifdef MACHINE_STACK_GROWS_UP @@ -130,6 +133,8 @@ uvm_grow(struct proc *p, vaddr_t sp) #endif if (vm->vm_ssize + si <= atop(lim_cur(RLIMIT_STACK))) vm->vm_ssize += si; +out: + vm_map_unlock(map); } #ifndef SMALL_KERNEL |