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| author | Willy Tarreau <w@1wt.eu> | 2022-05-02 10:46:08 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-05-05 04:22:20 +0200 |
| commit | b2d057560b8107c633b39aabe517ff9d93f285e3 (patch) | |
| tree | cb66d5f31162d4a88c8814a5ecba085492ef98be /include/net/inet_hashtables.h | |
| parent | Merge branch 'wireguard-patches-for-5-18-rc6' (diff) | |
| download | linux-b2d057560b8107c633b39aabe517ff9d93f285e3.tar.xz linux-b2d057560b8107c633b39aabe517ff9d93f285e3.zip | |
secure_seq: use the 64 bits of the siphash for port offset calculation
SipHash replaced MD5 in secure_ipv{4,6}_port_ephemeral() via commit
7cd23e5300c1 ("secure_seq: use SipHash in place of MD5"), but the output
remained truncated to 32-bit only. In order to exploit more bits from the
hash, let's make the functions return the full 64-bit of siphash_3u32().
We also make sure the port offset calculation in __inet_hash_connect()
remains done on 32-bit to avoid the need for div_u64_rem() and an extra
cost on 32-bit systems.
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Moshe Kol <moshe.kol@mail.huji.ac.il>
Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il>
Cc: Amit Klein <aksecurity@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net/inet_hashtables.h')
| -rw-r--r-- | include/net/inet_hashtables.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h index f72ec113ae56..98e1ec1a14f0 100644 --- a/include/net/inet_hashtables.h +++ b/include/net/inet_hashtables.h @@ -425,7 +425,7 @@ static inline void sk_rcv_saddr_set(struct sock *sk, __be32 addr) } int __inet_hash_connect(struct inet_timewait_death_row *death_row, - struct sock *sk, u32 port_offset, + struct sock *sk, u64 port_offset, int (*check_established)(struct inet_timewait_death_row *, struct sock *, __u16, struct inet_timewait_sock **)); |