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| author | Simon Horman <horms@verge.net.au> | 2013-05-28 20:34:27 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-05-28 23:49:07 -0700 |
| commit | f7c0c2ae843b74f8dba55820cb0a3de19c976703 (patch) | |
| tree | e2bd88b85cecb6f616a16a5926342dd35c059a97 /net/ipv4/icmp.c | |
| parent | 29a3cad5c6ae9e7fbf1509d01d39c3c3c38f11f9 (diff) | |
| download | linux-f7c0c2ae843b74f8dba55820cb0a3de19c976703.tar.gz linux-f7c0c2ae843b74f8dba55820cb0a3de19c976703.tar.bz2 linux-f7c0c2ae843b74f8dba55820cb0a3de19c976703.zip | |
ipv4: Correct comparisons and calculations using skb->tail and skb-transport_header
This corrects an regression introduced by "net: Use 16bits for *_headers
fields of struct skbuff" when NET_SKBUFF_DATA_USES_OFFSET is not set. In
that case skb->tail will be a pointer whereas skb->transport_header
will be an offset from head. This is corrected by using wrappers that
ensure that comparisons and calculations are always made using pointers.
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/icmp.c')
| -rw-r--r-- | net/ipv4/icmp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 562efd91f457..5d0d379b0152 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -503,7 +503,8 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info) iph = ip_hdr(skb_in); if ((u8 *)iph < skb_in->head || - (skb_in->network_header + sizeof(*iph)) > skb_in->tail) + (skb_network_header(skb_in) + sizeof(*iph)) > + skb_tail_pointer(skb_in)) goto out; /* |