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authorJozsef Kadlecsik <kadlec@netfilter.org>2020-02-22 12:01:43 +0100
committerJozsef Kadlecsik <kadlec@netfilter.org>2020-02-22 12:13:45 +0100
commit8af1c6fbd9239877998c7f5a591cb2c88d41fb66 (patch)
tree3dd963d34f4d280fe5c878f0a96be6ab7a4d3f72 /net
parentf66ee0410b1c3481ee75e5db9b34547b4d582465 (diff)
netfilter: ipset: Fix forceadd evaluation path
When the forceadd option is enabled, the hash:* types should find and replace the first entry in the bucket with the new one if there are no reuseable (deleted or timed out) entries. However, the position index was just not set to zero and remained the invalid -1 if there were no reuseable entries. Reported-by: syzbot+6a86565c74ebe30aea18@syzkaller.appspotmail.com Fixes: 23c42a403a9c ("netfilter: ipset: Introduction of new commands and protocol version 7") Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/ipset/ip_set_hash_gen.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h
index 71e93eac0831..e52d7b7597a0 100644
--- a/net/netfilter/ipset/ip_set_hash_gen.h
+++ b/net/netfilter/ipset/ip_set_hash_gen.h
@@ -931,6 +931,8 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
}
}
if (reuse || forceadd) {
+ if (j == -1)
+ j = 0;
data = ahash_data(n, j, set->dsize);
if (!deleted) {
#ifdef IP_SET_HASH_WITH_NETS