diff options
| author | Willy Tarreau <w@1wt.eu> | 2022-05-02 11:46:08 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-06 09:33:49 +0300 |
| commit | ab5b00cfe0500f5f5a3648ca945b892156b839fb (patch) | |
| tree | f7d82467541c377890ed1f0e30fb14b3647c0f66 /include | |
| parent | 80cca53a48c8e604e3cb9bf86e26f062f433ce0d (diff) | |
| download | linux-ab5b00cfe0500f5f5a3648ca945b892156b839fb.tar.xz | |
secure_seq: use the 64 bits of the siphash for port offset calculation
commit b2d057560b8107c633b39aabe517ff9d93f285e3 upstream.
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>
[SG: Adjusted context]
Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/inet_hashtables.h | 2 | ||||
| -rw-r--r-- | include/net/secure_seq.h | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h index a1869a678944..a186c245a6f4 100644 --- a/include/net/inet_hashtables.h +++ b/include/net/inet_hashtables.h @@ -420,7 +420,7 @@ 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 **)); diff --git a/include/net/secure_seq.h b/include/net/secure_seq.h index d7d2495f83c2..dac91aa38c5a 100644 --- a/include/net/secure_seq.h +++ b/include/net/secure_seq.h @@ -4,8 +4,8 @@ #include <linux/types.h> -u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport); -u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr, +u64 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport); +u64 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr, __be16 dport); u32 secure_tcp_seq(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport); |