From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Eric Dumazet <edumazet@google.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.16 15/18] ip6_tunnel: better validate user provided tunnel names
Date: Wed, 11 Apr 2018 00:23:50 +0200 [thread overview]
Message-ID: <20180410212759.384487900@linuxfoundation.org> (raw)
In-Reply-To: <20180410212758.564682823@linuxfoundation.org>
4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet <edumazet@google.com>
[ Upstream commit db7a65e3ab78e5b1c4b17c0870ebee35a4ee3257 ]
Use valid_name() to make sure user does not provide illegal
device name.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv6/ip6_tunnel.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -297,13 +297,16 @@ static struct ip6_tnl *ip6_tnl_create(st
struct net_device *dev;
struct ip6_tnl *t;
char name[IFNAMSIZ];
- int err = -ENOMEM;
+ int err = -E2BIG;
- if (p->name[0])
+ if (p->name[0]) {
+ if (!dev_valid_name(p->name))
+ goto failed;
strlcpy(name, p->name, IFNAMSIZ);
- else
+ } else {
sprintf(name, "ip6tnl%%d");
-
+ }
+ err = -ENOMEM;
dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN,
ip6_tnl_dev_setup);
if (!dev)
next prev parent reply other threads:[~2018-04-10 22:23 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-10 22:23 [PATCH 4.16 00/18] 4.16.2-stable review Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 01/18] sparc64: Oracle DAX driver depends on SPARC64 Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 02/18] arp: fix arp_filter on l3slave devices Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 03/18] net: dsa: Discard frames from unused ports Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 04/18] net/ipv6: Increment OUTxxx counters after netfilter hook Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 05/18] net/sched: fix NULL dereference in the error path of tcf_bpf_init() Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 06/18] pptp: remove a buggy dst release in pptp_connect() Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 07/18] sctp: do not leak kernel memory to user space Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 08/18] sctp: sctp_sockaddr_af must check minimal addr length for AF_INET6 Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 09/18] sky2: Increase D3 delay to sky2 stops working after suspend Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 10/18] vlan: also check phy_driver ts_info for vlans real device Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 11/18] net: fool proof dev_valid_name() Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 12/18] ip_tunnel: better validate user provided tunnel names Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 13/18] ipv6: sit: " Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 14/18] ip6_gre: " Greg Kroah-Hartman
2018-04-10 22:23 ` Greg Kroah-Hartman [this message]
2018-04-10 22:23 ` [PATCH 4.16 16/18] vti6: " Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 17/18] net_sched: fix a missing idr_remove() in u32_delete_key() Greg Kroah-Hartman
2018-04-10 22:23 ` [PATCH 4.16 18/18] nfp: use full 40 bits of the NSP buffer address Greg Kroah-Hartman
2018-04-11 6:02 ` [PATCH 4.16 00/18] 4.16.2-stable review kernelci.org bot
2018-04-11 17:15 ` Shuah Khan
2018-04-12 12:31 ` Greg Kroah-Hartman
2018-04-11 17:27 ` Guenter Roeck
2018-04-12 12:31 ` Greg Kroah-Hartman
2018-04-11 19:26 ` Dan Rue
2018-04-12 12:32 ` Greg Kroah-Hartman
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