diff options
| -rw-r--r-- | net/ipv4/route.c | 4 | ||||
| -rw-r--r-- | net/ipv6/ip6_output.c | 3 |
2 files changed, 6 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 4f7c378c841d..13816361fc04 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -487,13 +487,15 @@ EXPORT_SYMBOL(ip_idents_reserve); void __ip_select_ident(struct iphdr *iph, int segs) { static u32 ip_idents_hashrnd __read_mostly; + static u32 ip_idents_hashrnd_extra __read_mostly; u32 hash, id; net_get_random_once(&ip_idents_hashrnd, sizeof(ip_idents_hashrnd)); + net_get_random_once(&ip_idents_hashrnd_extra, sizeof(ip_idents_hashrnd_extra)); hash = jhash_3words((__force u32)iph->daddr, (__force u32)iph->saddr, - iph->protocol, + iph->protocol ^ ip_idents_hashrnd_extra, ip_idents_hashrnd); id = ip_idents_reserve(hash, segs); iph->id = htons(id); diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index e59b30054b0f..bb98cde51476 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -541,12 +541,15 @@ static void ip6_copy_metadata(struct sk_buff *to, struct sk_buff *from) static void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt) { static u32 ip6_idents_hashrnd __read_mostly; + static u32 ip6_idents_hashrnd_extra __read_mostly; u32 hash, id; net_get_random_once(&ip6_idents_hashrnd, sizeof(ip6_idents_hashrnd)); + net_get_random_once(&ip6_idents_hashrnd_extra, sizeof(ip6_idents_hashrnd_extra)); hash = __ipv6_addr_jhash(&rt->rt6i_dst.addr, ip6_idents_hashrnd); hash = __ipv6_addr_jhash(&rt->rt6i_src.addr, hash); + hash = jhash_1word(hash, ip6_idents_hashrnd_extra); id = ip_idents_reserve(hash, 1); fhdr->identification = htonl(id); |