1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 457f2d7430cf..15d67635bb10 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -123,7 +123,7 @@ static int tun_attach(struct tun_struct *tun, struct file *file)
 
         /* Check permissions */
         if (((tun->owner != -1 && cred->euid != tun->owner) ||
-             (tun->group != -1 && cred->egid != tun->group)) &&
+             (tun->group != -1 && !in_egroup_p(tun->group))) &&
                 !capable(CAP_NET_ADMIN))
                 return -EPERM;