diff -r fda0775c4195 sys/src/cmd/hjfs/auth.c
--- a/sys/src/cmd/hjfs/auth.c	Tue Jan 19 18:14:53 2021 -0800
+++ b/sys/src/cmd/hjfs/auth.c	Tue Jan 19 19:31:18 2021 -0800
@@ -301,10 +301,13 @@
 	if((fs->flags & FSNOPERM) != 0)
 		return 1;
 	perm = d->mode & 0777;
-	if(d->uid == uid)
-		perm >>= 6;
-	else if(ingroup(fs, uid, d->gid, 0))
-		perm >>= 3;
+	/* uid none gets only other permissions */
+	if(d->uid != 0) {
+		if(d->uid == uid)
+			perm >>= 6;
+		else if(ingroup(fs, uid, d->gid, 0))
+			perm >>= 3;
+	}
 	switch(mode & 3){
 	case OREAD:
 		return (perm & 4) != 0;