netfilter: ipset: Limit the maximal range of consecutive elements to add/delete

The range size of consecutive elements were not limited. Thus one could define a huge range which may result soft lockup errors due to the long execution time. Now the range size is limited to 2^20 entries. Reported-by: Brad Spengler <spender@grsecurity.net> Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-07-28 17:01:15 +02:00
parent c7d1022326
commit 5f7b51bf09
11 changed files with 88 additions and 7 deletions
@@ -196,6 +196,9 @@ struct ip_set_region {
 	u32 elements;		/* Number of elements vs timeout */
 };

+/* Max range where every element is added/deleted in one step */
+#define IPSET_MAX_RANGE		(1<<20)
+
 /* The max revision number supported by any set type + 1 */
 #define IPSET_REVISION_MAX	9