netfilter: nf_conntrack: table max size should hold at least table size

Table size is defined as unsigned, wheres the table maximum size is
defined as a signed integer. The calculation of max is 8 or 4,
multiplied the table size. Therefore the max value is aligned to
unsigned.
Signed-off-by: NHagen Paul Pfeifer <hagen@jauu.net>
Signed-off-by: NPatrick McHardy <kaber@trash.net>

include/net/netfilter/nf_conntrack.h

@@ -287,7 +287,7 @@ static inline int nf_ct_is_untracked(const struct sk_buff *skb)
 
 extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp);
 extern unsigned int nf_conntrack_htable_size;
-extern int nf_conntrack_max;
+extern unsigned int nf_conntrack_max;
 
 #define NF_CT_STAT_INC(net, count)	\
 	(per_cpu_ptr((net)->ct.stat, raw_smp_processor_id())->count++)

net/netfilter/nf_conntrack_core.c

@@ -54,7 +54,7 @@ EXPORT_SYMBOL_GPL(nf_conntrack_lock);
 unsigned int nf_conntrack_htable_size __read_mostly;
 EXPORT_SYMBOL_GPL(nf_conntrack_htable_size);
 
-int nf_conntrack_max __read_mostly;
+unsigned int nf_conntrack_max __read_mostly;
 EXPORT_SYMBOL_GPL(nf_conntrack_max);
 
 struct nf_conn nf_conntrack_untracked __read_mostly;