diff options
author | Ben Hutchings <ben@decadent.org.uk> | 2017-05-31 14:15:41 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-06-02 19:57:27 +0200 |
commit | 6e80ac5cc992ab6256c3dae87f7e57db15e1a58c (patch) | |
tree | ab042c99dd3349f1cf7d8af7dd585db670d6ff58 /net | |
parent | Merge tag 'mac80211-for-davem-2017-06-02' of git://git.kernel.org/pub/scm/lin... (diff) | |
download | linux-6e80ac5cc992ab6256c3dae87f7e57db15e1a58c.tar.xz linux-6e80ac5cc992ab6256c3dae87f7e57db15e1a58c.zip |
ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()
xfrm6_find_1stfragopt() may now return an error code and we must
not treat it as a length.
Fixes: 2423496af35d ("ipv6: Prevent overrun when parsing v6 header options")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: Craig Gallek <kraig@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv6/xfrm6_mode_ro.c | 2 | ||||
-rw-r--r-- | net/ipv6/xfrm6_mode_transport.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_mode_ro.c b/net/ipv6/xfrm6_mode_ro.c index 0e015906f9ca..07d36573f50b 100644 --- a/net/ipv6/xfrm6_mode_ro.c +++ b/net/ipv6/xfrm6_mode_ro.c @@ -47,6 +47,8 @@ static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb) iph = ipv6_hdr(skb); hdr_len = x->type->hdr_offset(x, skb, &prevhdr); + if (hdr_len < 0) + return hdr_len; skb_set_mac_header(skb, (prevhdr - x->props.header_len) - skb->data); skb_set_network_header(skb, -x->props.header_len); skb->transport_header = skb->network_header + hdr_len; diff --git a/net/ipv6/xfrm6_mode_transport.c b/net/ipv6/xfrm6_mode_transport.c index 7a92c0f31912..9ad07a91708e 100644 --- a/net/ipv6/xfrm6_mode_transport.c +++ b/net/ipv6/xfrm6_mode_transport.c @@ -30,6 +30,8 @@ static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb) skb_set_inner_transport_header(skb, skb_transport_offset(skb)); hdr_len = x->type->hdr_offset(x, skb, &prevhdr); + if (hdr_len < 0) + return hdr_len; skb_set_mac_header(skb, (prevhdr - x->props.header_len) - skb->data); skb_set_network_header(skb, -x->props.header_len); skb->transport_header = skb->network_header + hdr_len; |