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authorLinus Torvalds <torvalds@linux-foundation.org>2014-10-19 11:41:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-19 11:41:57 -0700
commite25b492741373542fb593477547fcf7a6b7d8b04 (patch)
tree783f0607cf3d962f443f2f27e47e4c194427d595 /net/ipv6
parent52d589a01d4545ce1dc5c3892bb8c7b55edfe714 (diff)
parent228b16cb13dfa2f77354a9b144a07e86e2dda01c (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller: "A quick batch of bug fixes: 1) Fix build with IPV6 disabled, from Eric Dumazet. 2) Several more cases of caching SKB data pointers across calls to pskb_may_pull(), thus referencing potentially free'd memory. From Li RongQing. 3) DSA phy code tests operation presence improperly, instead of going: if (x->ops->foo) r = x->ops->foo(args); it was going: if (x->ops->foo(args)) r = x->ops->foo(args); Fix from Andew Lunn" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: Net: DSA: Fix checking for get_phy_flags function ipv6: fix a potential use after free in sit.c ipv6: fix a potential use after free in ip6_offload.c ipv4: fix a potential use after free in gre_offload.c tcp: fix build error if IPv6 is not enabled
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ip6_offload.c1
-rw-r--r--net/ipv6/sit.c6
2 files changed, 4 insertions, 3 deletions
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 9034f76ae013..91014d32488d 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -46,6 +46,7 @@ static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
if (unlikely(!pskb_may_pull(skb, len)))
break;
+ opth = (void *)skb->data;
proto = opth->nexthdr;
__skb_pull(skb, len);
}
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 6eab37cf5345..58e5b4710127 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -485,11 +485,11 @@ static void ipip6_tunnel_uninit(struct net_device *dev)
*/
static int ipip6_err_gen_icmpv6_unreach(struct sk_buff *skb)
{
- const struct iphdr *iph = (const struct iphdr *) skb->data;
+ int ihl = ((const struct iphdr *)skb->data)->ihl*4;
struct rt6_info *rt;
struct sk_buff *skb2;
- if (!pskb_may_pull(skb, iph->ihl * 4 + sizeof(struct ipv6hdr) + 8))
+ if (!pskb_may_pull(skb, ihl + sizeof(struct ipv6hdr) + 8))
return 1;
skb2 = skb_clone(skb, GFP_ATOMIC);
@@ -498,7 +498,7 @@ static int ipip6_err_gen_icmpv6_unreach(struct sk_buff *skb)
return 1;
skb_dst_drop(skb2);
- skb_pull(skb2, iph->ihl * 4);
+ skb_pull(skb2, ihl);
skb_reset_network_header(skb2);
rt = rt6_lookup(dev_net(skb->dev), &ipv6_hdr(skb2)->saddr, NULL, 0, 0);