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Groups > linux.kernel > #1572621

[PATCH 4.4 05/20] net: lwtunnel: Handle lwtunnel_fill_encap failure

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

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

From: David Ahern <dsa@cumulusnetworks.com>


[ Upstream commit ea7a80858f57d8878b1499ea0f1b8a635cc48de7 ]

Handle failure in lwtunnel_fill_encap adding attributes to skb.

Fixes: 571e722676fe ("ipv4: support for fib route lwtunnel encap attributes")
Fixes: 19e42e451506 ("ipv6: support for fib route lwtunnel encap attributes")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/fib_semantics.c |   11 +++++++----
 net/ipv6/route.c         |    3 ++-
 2 files changed, 9 insertions(+), 5 deletions(-)

--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1277,8 +1277,9 @@ int fib_dump_info(struct sk_buff *skb, u
 		    nla_put_u32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid))
 			goto nla_put_failure;
 #endif
-		if (fi->fib_nh->nh_lwtstate)
-			lwtunnel_fill_encap(skb, fi->fib_nh->nh_lwtstate);
+		if (fi->fib_nh->nh_lwtstate &&
+		    lwtunnel_fill_encap(skb, fi->fib_nh->nh_lwtstate) < 0)
+			goto nla_put_failure;
 	}
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
 	if (fi->fib_nhs > 1) {
@@ -1314,8 +1315,10 @@ int fib_dump_info(struct sk_buff *skb, u
 			    nla_put_u32(skb, RTA_FLOW, nh->nh_tclassid))
 				goto nla_put_failure;
 #endif
-			if (nh->nh_lwtstate)
-				lwtunnel_fill_encap(skb, nh->nh_lwtstate);
+			if (nh->nh_lwtstate &&
+			    lwtunnel_fill_encap(skb, nh->nh_lwtstate) < 0)
+				goto nla_put_failure;
+
 			/* length of rtnetlink header + attributes */
 			rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *) rtnh;
 		} endfor_nexthops(fi);
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -3196,7 +3196,8 @@ static int rt6_fill_node(struct net *net
 	if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt->rt6i_flags)))
 		goto nla_put_failure;
 
-	lwtunnel_fill_encap(skb, rt->dst.lwtstate);
+	if (lwtunnel_fill_encap(skb, rt->dst.lwtstate) < 0)
+		goto nla_put_failure;
 
 	nlmsg_end(skb, nlh);
 	return 0;

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[PATCH 4.4 00/20] 4.4.47-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  [PATCH 4.4 15/20] tcp: initialize max window for a new fastopen socket Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  [PATCH 4.4 12/20] net: fix harmonize_features() vs NETIF_F_HIGHDMA Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  [PATCH 4.4 02/20] mlxsw: spectrum: Fix memory leak at skb reallocation Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  [PATCH 4.4 20/20] net: dsa: Bring back device detaching in dsa_slave_suspend() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  [PATCH 4.4 05/20] net: lwtunnel: Handle lwtunnel_fill_encap failure Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  [PATCH 4.4 14/20] ipv6: addrconf: Avoid addrconf_disable_change() using RCU read-side lock Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  [PATCH 4.4 13/20] net: phy: bcm63xx: Utilize correct config_intr function Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  [PATCH 4.4 06/20] net: ipv4: fix table id in getroute response Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-02 19:40 +0100
  Re: [PATCH 4.4 00/20] 4.4.47-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-02-02 21:40 +0100
  Re: [PATCH 4.4 00/20] 4.4.47-stable review Guenter Roeck <linux@roeck-us.net> - 2017-02-03 06:20 +0100

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