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authorChangli Gao <xiaosuo@gmail.com>2010-08-04 04:55:40 +0000
committerDavid S. Miller <davem@davemloft.net>2010-08-04 21:53:15 -0700
commit12dc96d1673feabef98eed1b5ff37abaa67fbe64 (patch)
tree4f92d2b0eac8e5e2ceedfe42ae0182302d28de65 /net/sched/cls_rsvp.h
parentcls_flow: add sanity check for the packet length (diff)
downloadlinux-dev-12dc96d1673feabef98eed1b5ff37abaa67fbe64.tar.xz
linux-dev-12dc96d1673feabef98eed1b5ff37abaa67fbe64.zip
cls_rsvp: add sanity check for the packet length
The packet length should be checked before the packet data is dereferenced. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_rsvp.h')
-rw-r--r--net/sched/cls_rsvp.h12
1 files changed, 10 insertions, 2 deletions
diff --git a/net/sched/cls_rsvp.h b/net/sched/cls_rsvp.h
index dd9414e44200..425a1790b048 100644
--- a/net/sched/cls_rsvp.h
+++ b/net/sched/cls_rsvp.h
@@ -143,9 +143,17 @@ static int rsvp_classify(struct sk_buff *skb, struct tcf_proto *tp,
u8 tunnelid = 0;
u8 *xprt;
#if RSVP_DST_LEN == 4
- struct ipv6hdr *nhptr = ipv6_hdr(skb);
+ struct ipv6hdr *nhptr;
+
+ if (!pskb_network_may_pull(skb, sizeof(*nhptr)))
+ return -1;
+ nhptr = ipv6_hdr(skb);
#else
- struct iphdr *nhptr = ip_hdr(skb);
+ struct iphdr *nhptr;
+
+ if (!pskb_network_may_pull(skb, sizeof(*nhptr)))
+ return -1;
+ nhptr = ip_hdr(skb);
#endif
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