diff options
| author | Eric Dumazet | 2019-03-27 12:40:33 -0700 |
|---|---|---|
| committer | David S. Miller | 2019-03-27 14:29:26 -0700 |
| commit | df453700e8d81b1bdafdf684365ee2b9431fb702 (patch) | |
| tree | cb7ea20a23956471c8362fd5d687822fd3ecc5cf /include/net/netns | |
| parent | 180a8c3d5dad5862b2f19727b363069bfecb26d8 (diff) | |
inet: switch IP ID generator to siphash
According to Amit Klein and Benny Pinkas, IP ID generation is too weak
and might be used by attackers.
Even with recent net_hash_mix() fix (netns: provide pure entropy for net_hash_mix())
having 64bit key and Jenkins hash is risky.
It is time to switch to siphash and its 128bit keys.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Amit Klein <aksecurity@gmail.com>
Reported-by: Benny Pinkas <benny@pinkas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netns')
| -rw-r--r-- | include/net/netns/ipv4.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index 104a6669e344..7698460a3dd1 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -9,6 +9,7 @@ #include <linux/uidgid.h> #include <net/inet_frag.h> #include <linux/rcupdate.h> +#include <linux/siphash.h> struct tcpm_hash_bucket; struct ctl_table_header; @@ -217,5 +218,6 @@ struct netns_ipv4 { unsigned int ipmr_seq; /* protected by rtnl_mutex */ atomic_t rt_genid; + siphash_key_t ip_id_key; }; #endif |