diff options
| author |   guenther <guenther@openbsd.org> | 2008-10-09 06:31:53 +0000 |
|---|---|---|
| committer | guenther <guenther@openbsd.org> | 2008-10-09 06:31:53 +0000 |
| commit | 5de831d5975031cedc04a30f1f47cd7c4c9b119f (patch) | |
| tree | c0eb31105d3fe896ea9f21a93003523c50b38365 /sys/kern/kern_fork.c | |
| parent | support setting PermitEmptyPasswords in a Match block (diff) | |
| download | wireguard-openbsd-5de831d5975031cedc04a30f1f47cd7c4c9b119f.tar.xz wireguard-openbsd-5de831d5975031cedc04a30f1f47cd7c4c9b119f.zip | |
Put a reference count in struct process to prevent use-after-free
if the main thread reaches the reaper ahead of some other thread
in the process.
ok art@ tedu@
Diffstat (limited to 'sys/kern/kern_fork.c')
| -rw-r--r-- | sys/kern/kern_fork.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c index a7ba5624565..42a57f07ee0 100644 --- a/sys/kern/kern_fork.c +++ b/sys/kern/kern_fork.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_fork.c,v 1.95 2008/05/11 23:54:40 tedu Exp $ */ +/* $OpenBSD: kern_fork.c,v 1.96 2008/10/09 06:31:53 guenther Exp $ */ /* $NetBSD: kern_fork.c,v 1.29 1996/02/09 18:59:34 christos Exp $ */ /* @@ -161,6 +161,7 @@ process_new(struct proc *newproc, struct proc *parent) pr->ps_mainproc = newproc; TAILQ_INIT(&pr->ps_threads); TAILQ_INSERT_TAIL(&pr->ps_threads, newproc, p_thr_link); + pr->ps_refcnt = 1; newproc->p_p = pr; } @@ -231,6 +232,7 @@ fork1(struct proc *p1, int exitsig, int flags, void *stack, size_t stacksize, atomic_setbits_int(&p2->p_flag, P_THREAD); p2->p_p = p1->p_p; TAILQ_INSERT_TAIL(&p2->p_p->ps_threads, p2, p_thr_link); + p2->p_p->ps_refcnt++; } else { process_new(p2, p1); } |