diff options
| author | Philip Guenther <guenther@cvs.openbsd.org> | 2014-04-18 11:51:18 +0000 |
|---|---|---|
| committer | Philip Guenther <guenther@cvs.openbsd.org> | 2014-04-18 11:51:18 +0000 |
| commit | 0a8d233b5a2f60bcd449b707cc466d17560dec34 (patch) | |
| tree | 2e60f99714a1681f8961c7ac537c7791334ec02e /sys/arch/vax | |
| parent | c69678059df7cbd9d0d400a81c0b2430847a6436 (diff) | |
Have each thread keeps its own (counted!) reference to the process's ucreds
to avoid possible use-after-free references when swapping ids in threaded
processes. "Do I have the right creds?" checks are always made with the
threads creds.
Inspired by FreeBSD and NetBSD
"right time" deraadt@
Diffstat (limited to 'sys/arch/vax')
| -rw-r--r-- | sys/arch/vax/vax/trap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/arch/vax/vax/trap.c b/sys/arch/vax/vax/trap.c index d7e06b1d49d..bcd9a5a609f 100644 --- a/sys/arch/vax/vax/trap.c +++ b/sys/arch/vax/vax/trap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: trap.c,v 1.50 2014/03/30 21:54:49 guenther Exp $ */ +/* $OpenBSD: trap.c,v 1.51 2014/04/18 11:51:17 guenther Exp $ */ /* $NetBSD: trap.c,v 1.47 1999/08/21 19:26:20 matt Exp $ */ /* * Copyright (c) 1994 Ludd, University of Lule}, Sweden. @@ -110,6 +110,7 @@ arithflt(frame) if ((umode = USERMODE(frame))) { type |= T_USER; p->p_addr->u_pcb.framep = frame; + refreshcreds(p); } type&=~(T_WRITE|T_PTEFETCH); |