diff options
| author | Ross Lagerwall <ross.lagerwall@citrix.com> | 2019-01-17 15:34:38 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-31 08:14:31 +0100 |
| commit | 40f2f08030fa59f634ed8313f4c9578416f2a108 (patch) | |
| tree | 4605da9a0ab26eab21f80c448c9ebd566ad139bb /net/bridge/br_netfilter_ipv6.c | |
| parent | e287968a3837458cd489bdfad7095bb5a10a61b6 (diff) | |
net: Fix usage of pskb_trim_rcsum
[ Upstream commit 6c57f0458022298e4da1729c67bd33ce41c14e7a ]
In certain cases, pskb_trim_rcsum() may change skb pointers.
Reinitialize header pointers afterwards to avoid potential
use-after-frees. Add a note in the documentation of
pskb_trim_rcsum(). Found by KASAN.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/bridge/br_netfilter_ipv6.c')
| -rw-r--r-- | net/bridge/br_netfilter_ipv6.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bridge/br_netfilter_ipv6.c b/net/bridge/br_netfilter_ipv6.c index 96c072e71ea2..5811208863b7 100644 --- a/net/bridge/br_netfilter_ipv6.c +++ b/net/bridge/br_netfilter_ipv6.c @@ -131,6 +131,7 @@ int br_validate_ipv6(struct net *net, struct sk_buff *skb) IPSTATS_MIB_INDISCARDS); goto drop; } + hdr = ipv6_hdr(skb); } if (hdr->nexthdr == NEXTHDR_HOP && br_nf_check_hbh_len(skb)) goto drop; |