diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2018-02-10 22:59:03 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2018-02-10 22:59:03 +0000 |
| commit | c70e2652a25154153d77119ed56ff13c995ade68 (patch) | |
| tree | 44277f00d82d2ecdba6fdf5a03d097c951dcf4cb /lib/librthread | |
| parent | 6c9b27a683236066a5742a8d2dd97a3a4a1f2b80 (diff) | |
Shift top-of-stack down so that the random==0 case doesn't leave stack
pointer beyond the space.
ok stefan, tedu
Diffstat (limited to 'lib/librthread')
| -rw-r--r-- | lib/librthread/rthread_stack.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/librthread/rthread_stack.c b/lib/librthread/rthread_stack.c index f40ca006c86..73c13e8478d 100644 --- a/lib/librthread/rthread_stack.c +++ b/lib/librthread/rthread_stack.c @@ -1,4 +1,4 @@ -/* $OpenBSD: rthread_stack.c,v 1.17 2017/09/05 02:40:54 guenther Exp $ */ +/* $OpenBSD: rthread_stack.c,v 1.18 2018/02/10 22:59:02 deraadt Exp $ */ /* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */ @@ -65,7 +65,7 @@ _rthread_alloc_stack(pthread_t thread) #ifdef MACHINE_STACK_GROWS_UP stack->sp = base + rnd; #else - stack->sp = base + thread->attr.stack_size - rnd; + stack->sp = base + thread->attr.stack_size - (_STACKALIGNBYTES+1) - rnd; #endif /* * This impossible guardsize marks this stack as @@ -103,7 +103,7 @@ _rthread_alloc_stack(pthread_t thread) stack->sp = base + rnd; #else guard = base; - stack->sp = base + size - rnd; + stack->sp = base + size - (_STACKALIGNBYTES+1) - rnd; #endif /* memory protect the guard region */ |