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netfilter: ipset: Fix hash type expire: release empty hash bucket block 

When all entries are expired/all slots are empty, release the bucket.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
hifive-unleashed-5.1
Jozsef Kadlecsik 2015-11-07 11:24:51 +01:00
parent e9dfdc052d
commit 0aae24eb40
1 changed files with 9 additions and 4 deletions
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13
net/netfilter/ipset/ip_set_hash_gen.h
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@ -476,7 +476,7 @@ static void
mtype_expire(struct ip_set *set, struct htype *h, u8 nets_length, size_t dsize)
{
struct htable *t;
struct hbucket *n;
struct hbucket *n, *tmp;
struct mtype_elem *data;
u32 i, j, d;
#ifdef IP_SET_HASH_WITH_NETS
@ -511,9 +511,14 @@ mtype_expire(struct ip_set *set, struct htype *h, u8 nets_length, size_t dsize)
}
}
if (d >= AHASH_INIT_SIZE) {
struct hbucket *tmp = kzalloc(sizeof(*tmp) +
(n->size - AHASH_INIT_SIZE) * dsize,
GFP_ATOMIC);
if (d >= n->size) {
rcu_assign_pointer(hbucket(t, i), NULL);
kfree_rcu(n, rcu);
continue;
}
tmp = kzalloc(sizeof(*tmp) +
(n->size - AHASH_INIT_SIZE) * dsize,
GFP_ATOMIC);
if (!tmp)
/* Still try to delete expired elements */
continue;