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make sure that any messing we do with a process's directories happens atomically and not after sleeping.

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ok deraadt pedro
This commit is contained in:
tedu 2008-11-11 02:11:25 +00:00
parent 93e859c46a
commit 7f4c1854d7
1 changed files with 6 additions and 7 deletions
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13
sys/kern/vfs_syscalls.c
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@ -1,4 +1,4 @@
/* $OpenBSD: vfs_syscalls.c,v 1.151 2008/11/01 20:34:09 deraadt Exp $ */
/* $OpenBSD: vfs_syscalls.c,v 1.152 2008/11/11 02:11:25 tedu Exp $ */
/* $NetBSD: vfs_syscalls.c,v 1.71 1996/04/23 10:29:02 mycroft Exp $ */
/*
@ -323,9 +323,8 @@ void
checkdirs(struct vnode *olddp)
{
struct filedesc *fdp;
struct vnode *newdp;
struct vnode *newdp, *vp;
struct proc *p;
int slept;
if (olddp->v_usecount == 1)
return;
@ -335,17 +334,17 @@ again:
LIST_FOREACH(p, &allproc, p_list) {
fdp = p->p_fd;
if (fdp->fd_cdir == olddp) {
slept = vrele(fdp->fd_cdir);
vp = fdp->fd_cdir;
VREF(newdp);
fdp->fd_cdir = newdp;
if (slept)
if (vrele(vp))
goto again;
}
if (fdp->fd_rdir == olddp) {
slept = vrele(fdp->fd_rdir);
vp = fdp->fd_rdir;
VREF(newdp);
fdp->fd_rdir = newdp;
if (slept)
if (vrele(vp))
goto again;
}
}