net: reject creation of netdev names with colons

[ Upstream commit a4176a9391868bfa87705bcd2e3b49e9b9dd2996 ]

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@mthode.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/net/core/dev.c b/net/core/dev.c
index 81e5f55..1c0d862 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -859,7 +859,7 @@ int dev_valid_name(const char *name)
                return 0;
 
        while (*name) {
-               if (*name == '/' || isspace(*name))
+               if (*name == '/' || *name == ':' || isspace(*name))
                        return 0;
                name++;
        }