netdev - [PATCH] ppp: allow usage in namespaces

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Message-Id: <20171027180823.31144-1-mcroce@redhat.com>
Date:   Fri, 27 Oct 2017 20:08:23 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     Paul Mackerras <paulus@...ba.org>, linux-ppp@...r.kernel.org,
        netdev@...r.kernel.org
Cc:     "David S . Miller" <davem@...emloft.net>
Subject: [PATCH] ppp: allow usage in namespaces

Check for CAP_NET_ADMIN with ns_capable() instead of capable()
to allow usage of ppp in user namespace other than the init one.

Signed-off-by: Matteo Croce <mcroce@...hat.com>
---
 drivers/net/ppp/ppp_generic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 6566107cef84..af7f93ed1487 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -390,7 +390,7 @@ static int ppp_open(struct inode *inode, struct file *file)
 	/*
 	 * This could (should?) be enforced by the permissions on /dev/ppp.
 	 */
-	if (!capable(CAP_NET_ADMIN))
+	if (!ns_capable(file->f_cred->user_ns, CAP_NET_ADMIN))
 		return -EPERM;
 	return 0;
 }
-- 
2.13.6