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netfilter: ipset: hash:*net*: nomatch flag not excluded on set resize

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If a resize is triggered the nomatch flag is not excluded at hashing,
which leads to the element missed at lookup in the resized set.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jozsef Kadlecsik
2013-04-09 08:57:20 +00:00
committed by Pablo Neira Ayuso
parent 02f815cb6d
commit 6eb4c7e96e
5 changed files with 99 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
include/linux/netfilter/ipset/ip_set_ahash.h
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@ -291,6 +291,7 @@ ip_set_hash_destroy(struct ip_set *set)
#define type_pf_data_tlist TOKEN(TYPE, PF, _data_tlist)
#define type_pf_data_next TOKEN(TYPE, PF, _data_next)
#define type_pf_data_flags TOKEN(TYPE, PF, _data_flags)
#define type_pf_data_reset_flags TOKEN(TYPE, PF, _data_reset_flags)
#ifdef IP_SET_HASH_WITH_NETS
#define type_pf_data_match TOKEN(TYPE, PF, _data_match)
#else
@ -385,9 +386,9 @@ type_pf_resize(struct ip_set *set, bool retried)
struct ip_set_hash *h = set->data;
struct htable *t, *orig = h->table;
u8 htable_bits = orig->htable_bits;
const struct type_pf_elem *data;
struct type_pf_elem *data;
struct hbucket *n, *m;
u32 i, j;
u32 i, j, flags = 0;
int ret;
retry:
@ -412,9 +413,16 @@ retry:
n = hbucket(orig, i);
for (j = 0; j < n->pos; j++) {
data = ahash_data(n, j);
#ifdef IP_SET_HASH_WITH_NETS
flags = 0;
type_pf_data_reset_flags(data, &flags);
#endif
m = hbucket(t, HKEY(data, h->initval, htable_bits));
ret = type_pf_elem_add(m, data, AHASH_MAX(h), 0);
ret = type_pf_elem_add(m, data, AHASH_MAX(h), flags);
if (ret < 0) {
#ifdef IP_SET_HASH_WITH_NETS
type_pf_data_flags(data, flags);
#endif
read_unlock_bh(&set->lock);
ahash_destroy(t);
if (ret == -EAGAIN)
@ -836,9 +844,9 @@ type_pf_tresize(struct ip_set *set, bool retried)
struct ip_set_hash *h = set->data;
struct htable *t, *orig = h->table;
u8 htable_bits = orig->htable_bits;
const struct type_pf_elem *data;
struct type_pf_elem *data;
struct hbucket *n, *m;
u32 i, j;
u32 i, j, flags = 0;
int ret;
/* Try to cleanup once */
@ -873,10 +881,17 @@ retry:
n = hbucket(orig, i);
for (j = 0; j < n->pos; j++) {
data = ahash_tdata(n, j);
#ifdef IP_SET_HASH_WITH_NETS
flags = 0;
type_pf_data_reset_flags(data, &flags);
#endif
m = hbucket(t, HKEY(data, h->initval, htable_bits));
ret = type_pf_elem_tadd(m, data, AHASH_MAX(h), 0,
ip_set_timeout_get(type_pf_data_timeout(data)));
ret = type_pf_elem_tadd(m, data, AHASH_MAX(h), flags,
ip_set_timeout_get(type_pf_data_timeout(data)));
if (ret < 0) {
#ifdef IP_SET_HASH_WITH_NETS
type_pf_data_flags(data, flags);
#endif
read_unlock_bh(&set->lock);
ahash_destroy(t);
if (ret == -EAGAIN)
@ -1187,6 +1202,7 @@ type_pf_gc_init(struct ip_set *set)
#undef type_pf_data_tlist
#undef type_pf_data_next
#undef type_pf_data_flags
#undef type_pf_data_reset_flags
#undef type_pf_data_match
#undef type_pf_elem