From f5caa5a507338e1e97d435df73c78a80915fc7a1 Mon Sep 17 00:00:00 2001
From: dchagin <dchagin@FreeBSD.org>
Date: Tue, 7 Mar 2017 17:09:12 +0000
Subject: [PATCH] Linux kernel does not export to the user space ipc_perm.mode
 values other than S_IRWXUGO (0777).

MFC after:	1 month
---
 sys/compat/linux/linux_ipc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/compat/linux/linux_ipc.c b/sys/compat/linux/linux_ipc.c
index c85dfb09f88d..a8c55099ed8b 100644
--- a/sys/compat/linux/linux_ipc.c
+++ b/sys/compat/linux/linux_ipc.c
@@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/msg.h>
 #include <sys/sem.h>
 #include <sys/shm.h>
+#include <sys/stat.h>
 
 #include "opt_compat.h"
 
@@ -151,7 +152,7 @@ bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc64_perm *lpp)
 	lpp->gid = bpp->gid;
 	lpp->cuid = bpp->cuid;
 	lpp->cgid = bpp->cgid;
-	lpp->mode = bpp->mode;
+	lpp->mode = bpp->mode & (S_IRWXU|S_IRWXG|S_IRWXO);
 	lpp->seq = bpp->seq;
 }