diff options
| -rw-r--r-- | sys/nlm/nlm_advlock.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sys/nlm/nlm_advlock.c b/sys/nlm/nlm_advlock.c index 003a43d..456af87 100644 --- a/sys/nlm/nlm_advlock.c +++ b/sys/nlm/nlm_advlock.c @@ -210,7 +210,7 @@ nlm_advlock_internal(struct vnode *vp, void *id, int op, struct flock *fl, struct rpc_callextra ext; struct nlm_feedback_arg nf; AUTH *auth; - struct ucred *cred; + struct ucred *cred, *cred1; struct nlm_file_svid *ns; int svid; int error; @@ -240,15 +240,17 @@ nlm_advlock_internal(struct vnode *vp, void *id, int op, struct flock *fl, else retries = INT_MAX; - if (unlock_vp) - VOP_UNLOCK(vp, 0); - /* * We need to switch to mount-point creds so that we can send - * packets from a privileged port. + * packets from a privileged port. Reference mnt_cred and + * switch to them before unlocking the vnode, since mount + * point could be unmounted right after unlock. */ cred = td->td_ucred; td->td_ucred = vp->v_mount->mnt_cred; + crhold(td->td_ucred); + if (unlock_vp) + VOP_UNLOCK(vp, 0); host = nlm_find_host_by_name(servername, sa, vers); auth = authunix_create(cred); @@ -373,7 +375,9 @@ nlm_advlock_internal(struct vnode *vp, void *id, int op, struct flock *fl, if (ns) nlm_free_svid(ns); + cred1 = td->td_ucred; td->td_ucred = cred; + crfree(cred1); AUTH_DESTROY(auth); nlm_host_release(host); |
