linux-kernel - [PATCH 3.16.y-ckt 019/165] net: reject creation of netdev names with colons

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Message-Id: <1427292138-7021-20-git-send-email-luis.henriques@canonical.com>
Date:	Wed, 25 Mar 2015 13:59:52 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Matthew Thode <mthode@...ode.org>,
	"David S. Miller" <davem@...emloft.net>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 019/165] net: reject creation of netdev names with colons

3.16.7-ckt9 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Matthew Thode <mthode@...ode.org>

commit a4176a9391868bfa87705bcd2e3b49e9b9dd2996 upstream.

colons are used as a separator in netdev device lookup in dev_ioctl.c

Specific functions are SIOCGIFTXQLEN SIOCETHTOOL SIOCSIFNAME

Signed-off-by: Matthew Thode <mthode@...ode.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 net/core/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index efcc7f4b4fc7..58bf1016a521 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -940,7 +940,7 @@ bool dev_valid_name(const char *name)
 		return false;
 
 	while (*name) {
-		if (*name == '/' || isspace(*name))
+		if (*name == '/' || *name == ':' || isspace(*name))
 			return false;
 		name++;
 	}
--
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