diff options
| author | David Ahern <dsa@cumulusnetworks.com> | 2016-02-23 10:10:26 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-25 15:34:26 -0500 |
| commit | 65c38aa653c14df49e19faad74bd375f36e61c57 (patch) | |
| tree | ff42824874036d2293626e8b0f80474fc42f0e3d /drivers/net/vrf.c | |
| parent | ee50c130c82175eaa0820c96b6d3763928af2241 (diff) | |
net: vrf: Remove direct access to skb->data
Nik pointed that the VRF driver should be using skb_header_pointer
instead of accessing skb->data and bits beyond directly which can
be garbage.
Fixes: 35402e313663 ("net: Add IPv6 support to VRF device")
Cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vrf.c')
| -rw-r--r-- | drivers/net/vrf.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 66addb7a7911..bdcf617a9d52 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -104,20 +104,23 @@ static struct dst_ops vrf_dst_ops = { #if IS_ENABLED(CONFIG_IPV6) static bool check_ipv6_frame(const struct sk_buff *skb) { - const struct ipv6hdr *ipv6h = (struct ipv6hdr *)skb->data; - size_t hlen = sizeof(*ipv6h); + const struct ipv6hdr *ipv6h; + struct ipv6hdr _ipv6h; bool rc = true; - if (skb->len < hlen) + ipv6h = skb_header_pointer(skb, 0, sizeof(_ipv6h), &_ipv6h); + if (!ipv6h) goto out; if (ipv6h->nexthdr == NEXTHDR_ICMP) { const struct icmp6hdr *icmph; + struct icmp6hdr _icmph; - if (skb->len < hlen + sizeof(*icmph)) + icmph = skb_header_pointer(skb, sizeof(_ipv6h), + sizeof(_icmph), &_icmph); + if (!icmph) goto out; - icmph = (struct icmp6hdr *)(skb->data + sizeof(*ipv6h)); switch (icmph->icmp6_type) { case NDISC_ROUTER_SOLICITATION: case NDISC_ROUTER_ADVERTISEMENT: |