1 files changed, 11 insertions, 0 deletions

diff --git a/sys/fs/pseudofs/pseudofs_vnops.c b/sys/fs/pseudofs/pseudofs_vnops.c
index d8fa427b3e990..31d7bbd7f8fb3 100644
--- a/sys/fs/pseudofs/pseudofs_vnops.c
+++ b/sys/fs/pseudofs/pseudofs_vnops.c
@@ -197,6 +197,17 @@ pfs_getattr(struct vop_getattr_args *va)
 	if (pvd->pvd_pid != NO_PID) {
 		if ((proc = pfind(pvd->pvd_pid)) == NULL)
 			PFS_RETURN (ENOENT);
+		/*
+		 * XXX: pfind() returning incompletely allocated processes
+		 * is probably a bug.  Or, at least, we should check the
+		 * process state, not the ucred pointer.  Work around for
+		 * now by checking that to avoid a possible NULL pointer
+		 * dereference.
+		 */
+		if (proc->p_ucred == NULL) {
+			PROC_UNLOCK(proc);
+			PFS_RETURN (ENOENT);
+		}
 		vap->va_uid = proc->p_ucred->cr_ruid;
 		vap->va_gid = proc->p_ucred->cr_rgid;
 		if (pn->pn_attr != NULL)