diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2022-11-17 16:19:14 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-11-17 18:30:39 -0800 |
| commit | 224b744abf9f0663ca6762a79c7298b663fa4f04 (patch) | |
| tree | 4f6a817547e7d0584d96cd539a3d63be75059cf1 /net/ipv4 | |
| parent | b4b221bd79a1c698d9653e3ae2c3cb61cdc9aee7 (diff) | |
| parent | 847ccab8fdcf4a0cd85a278480fab1ccdc9f6136 (diff) | |
| download | lwn-224b744abf9f0663ca6762a79c7298b663fa4f04.tar.gz lwn-224b744abf9f0663ca6762a79c7298b663fa4f04.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
include/linux/bpf.h
1f6e04a1c7b8 ("bpf: Fix offset calculation error in __copy_map_value and zero_map_value")
aa3496accc41 ("bpf: Refactor kptr_off_tab into btf_record")
f71b2f64177a ("bpf: Refactor map->off_arr handling")
https://lore.kernel.org/all/20221114095000.67a73239@canb.auug.org.au/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/Kconfig | 10 | ||||
| -rw-r--r-- | net/ipv4/inet_hashtables.c | 10 |
2 files changed, 15 insertions, 5 deletions
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig index e983bb0c5012..2dfb12230f08 100644 --- a/net/ipv4/Kconfig +++ b/net/ipv4/Kconfig @@ -402,6 +402,16 @@ config INET_IPCOMP If unsure, say Y. +config INET_TABLE_PERTURB_ORDER + int "INET: Source port perturbation table size (as power of 2)" if EXPERT + default 16 + help + Source port perturbation table size (as power of 2) for + RFC 6056 3.3.4. Algorithm 4: Double-Hash Port Selection Algorithm. + + The default is almost always what you want. + Only change this if you know what you are doing. + config INET_XFRM_TUNNEL tristate select INET_TUNNEL diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c index d3dc28156622..033bf3c2538f 100644 --- a/net/ipv4/inet_hashtables.c +++ b/net/ipv4/inet_hashtables.c @@ -906,13 +906,13 @@ EXPORT_SYMBOL_GPL(inet_bhash2_update_saddr); * Note that we use 32bit integers (vs RFC 'short integers') * because 2^16 is not a multiple of num_ephemeral and this * property might be used by clever attacker. + * * RFC claims using TABLE_LENGTH=10 buckets gives an improvement, though - * attacks were since demonstrated, thus we use 65536 instead to really - * give more isolation and privacy, at the expense of 256kB of kernel - * memory. + * attacks were since demonstrated, thus we use 65536 by default instead + * to really give more isolation and privacy, at the expense of 256kB + * of kernel memory. */ -#define INET_TABLE_PERTURB_SHIFT 16 -#define INET_TABLE_PERTURB_SIZE (1 << INET_TABLE_PERTURB_SHIFT) +#define INET_TABLE_PERTURB_SIZE (1 << CONFIG_INET_TABLE_PERTURB_ORDER) static u32 *table_perturb; int __inet_hash_connect(struct inet_timewait_death_row *death_row, |