Thread (10 messages) 10 messages, 2 authors, 2017-02-23
STALE3427d
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[PATCH 4/8] Fix bug: sometimes valid entries in hash:* types of sets were evicted

From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: 2017-02-23 11:14:24
Also in: netfilter-devel
Subsystem: netfilter, networking [general], the rest · Maintainers: Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds 

From: Jozsef Kadlecsik <redacted>

Wrong index was used and therefore when shrinking a hash bucket at
deleting an entry, valid entries could be evicted as well.
Thanks to Eric Ewanco for the thorough bugreport.

Fixes netfilter bugzilla #1119

Signed-off-by: Jozsef Kadlecsik <redacted>
---
 net/netfilter/ipset/ip_set_hash_gen.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h
index 1b05d4a7d5a1..f236c0bc7b3f 100644
--- a/net/netfilter/ipset/ip_set_hash_gen.h
+++ b/net/netfilter/ipset/ip_set_hash_gen.h
@@ -897,7 +897,7 @@ mtype_del(struct ip_set *set, void *value, const struct ip_set_ext *ext,
 					continue;
 				data = ahash_data(n, j, dsize);
 				memcpy(tmp->value + k * dsize, data, dsize);
-				set_bit(j, tmp->used);
+				set_bit(k, tmp->used);
 				k++;
 			}
 			tmp->pos = k;
-- 
2.1.4
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